go1.21.4 (released 2023-11-07) includes security fixes to the path/filepath
package, as well as bug fixes to the linker, the runtime, the compiler, and
the go/types, net/http, and runtime/cgo packages. See the Go 1.21.4 milestone
on our issue tracker for details:
- https://github.com/golang/go/issues?q=milestone%3AGo1.21.4+label%3ACherryPickApproved
- full diff: https://github.com/golang/go/compare/go1.21.3...go1.21.4
from the security mailing:
[security] Go 1.21.4 and Go 1.20.11 are released
Hello gophers,
We have just released Go versions 1.21.4 and 1.20.11, minor point releases.
These minor releases include 2 security fixes following the security policy:
- path/filepath: recognize `\??\` as a Root Local Device path prefix.
On Windows, a path beginning with `\??\` is a Root Local Device path equivalent
to a path beginning with `\\?\`. Paths with a `\??\` prefix may be used to
access arbitrary locations on the system. For example, the path `\??\c:\x`
is equivalent to the more common path c:\x.
The filepath package did not recognize paths with a `\??\` prefix as special.
Clean could convert a rooted path such as `\a\..\??\b` into
the root local device path `\??\b`. It will now convert this
path into `.\??\b`.
`IsAbs` did not report paths beginning with `\??\` as absolute.
It now does so.
VolumeName now reports the `\??\` prefix as a volume name.
`Join(`\`, `??`, `b`)` could convert a seemingly innocent
sequence of path elements into the root local device path
`\??\b`. It will now convert this to `\.\??\b`.
This is CVE-2023-45283 and https://go.dev/issue/63713.
- path/filepath: recognize device names with trailing spaces and superscripts
The `IsLocal` function did not correctly detect reserved names in some cases:
- reserved names followed by spaces, such as "COM1 ".
- "COM" or "LPT" followed by a superscript 1, 2, or 3.
`IsLocal` now correctly reports these names as non-local.
This is CVE-2023-45284 and https://go.dev/issue/63713.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
go1.21.3 (released 2023-10-10) includes a security fix to the net/http package.
See the Go 1.21.3 milestone on our issue tracker for details:
https://github.com/golang/go/issues?q=milestone%3AGo1.21.3+label%3ACherryPickApproved
full diff: https://github.com/golang/go/compare/go1.21.2...go1.21.3
From the security mailing:
[security] Go 1.21.3 and Go 1.20.10 are released
Hello gophers,
We have just released Go versions 1.21.3 and 1.20.10, minor point releases.
These minor releases include 1 security fixes following the security policy:
- net/http: rapid stream resets can cause excessive work
A malicious HTTP/2 client which rapidly creates requests and
immediately resets them can cause excessive server resource consumption.
While the total number of requests is bounded to the
http2.Server.MaxConcurrentStreams setting, resetting an in-progress
request allows the attacker to create a new request while the existing
one is still executing.
HTTP/2 servers now bound the number of simultaneously executing
handler goroutines to the stream concurrency limit. New requests
arriving when at the limit (which can only happen after the client
has reset an existing, in-flight request) will be queued until a
handler exits. If the request queue grows too large, the server
will terminate the connection.
This issue is also fixed in golang.org/x/net/http2 v0.17.0,
for users manually configuring HTTP/2.
The default stream concurrency limit is 250 streams (requests)
per HTTP/2 connection. This value may be adjusted using the
golang.org/x/net/http2 package; see the Server.MaxConcurrentStreams
setting and the ConfigureServer function.
This is CVE-2023-39325 and Go issue https://go.dev/issue/63417.
This is also tracked by CVE-2023-44487.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
go1.21.2 (released 2023-10-05) includes one security fixes to the cmd/go package,
as well as bug fixes to the compiler, the go command, the linker, the runtime,
and the runtime/metrics package. See the Go 1.21.2 milestone on our issue
tracker for details:
https://github.com/golang/go/issues?q=milestone%3AGo1.21.2+label%3ACherryPickApproved
full diff: https://github.com/golang/go/compare/go1.21.1...go1.21.2
From the security mailing:
[security] Go 1.21.2 and Go 1.20.9 are released
Hello gophers,
We have just released Go versions 1.21.2 and 1.20.9, minor point releases.
These minor releases include 1 security fixes following the security policy:
- cmd/go: line directives allows arbitrary execution during build
"//line" directives can be used to bypass the restrictions on "//go:cgo_"
directives, allowing blocked linker and compiler flags to be passed during
compliation. This can result in unexpected execution of arbitrary code when
running "go build". The line directive requires the absolute path of the file in
which the directive lives, which makes exploting this issue significantly more
complex.
This is CVE-2023-39323 and Go issue https://go.dev/issue/63211.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This required changes to the download-URL, as downloads are now provided
using the full version (including the `.0` patch version);
curl -sI https://go.dev/dl/go1.21.windows-amd64.zip | grep 'location'
location: https://dl.google.com/go/go1.21.windows-amd64.zip
curl -sI https://dl.google.com/go/go1.21.windows-amd64.zip
HTTP/2 404
# ...
curl -sI https://dl.google.com/go/go1.21.0.windows-amd64.zip
HTTP/2 200
# ...
Unfortunately this also means that the GO_VERSION can no longer be set to
versions lower than 1.21.0 (without additional changes), because older
versions do NOT provide the `.0` version, and Go 1.21.0 and up, no longer
provides URLs _without_ the `.0` version.
Co-authored-by: Bjorn Neergaard <bjorn.neergaard@docker.com>
Signed-off-by: Bjorn Neergaard <bjorn.neergaard@docker.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This exposes `ACTIONS_RUNTIME_TOKEN` and `ACTIONS_CACHE_URL`, which are
used to skip cache exporter tests, when combined with
a8789cbd4a
Co-authored-by: Bjorn Neergaard <bjorn.neergaard@docker.com>
Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>
Signed-off-by: Bjorn Neergaard <bjorn.neergaard@docker.com>
go1.20.8 (released 2023-09-06) includes two security fixes to the html/template
package, as well as bug fixes to the compiler, the go command, the runtime,
and the crypto/tls, go/types, net/http, and path/filepath packages. See the
Go 1.20.8 milestone on our issue tracker for details:
https://github.com/golang/go/issues?q=milestone%3AGo1.20.8+label%3ACherryPickApproved
full diff: https://github.com/golang/go/compare/go1.20.7...go1.20.8
From the security mailing:
[security] Go 1.21.1 and Go 1.20.8 are released
Hello gophers,
We have just released Go versions 1.21.1 and 1.20.8, minor point releases.
These minor releases include 4 security fixes following the security policy:
- cmd/go: go.mod toolchain directive allows arbitrary execution
The go.mod toolchain directive, introduced in Go 1.21, could be leveraged to
execute scripts and binaries relative to the root of the module when the "go"
command was executed within the module. This applies to modules downloaded using
the "go" command from the module proxy, as well as modules downloaded directly
using VCS software.
Thanks to Juho Nurminen of Mattermost for reporting this issue.
This is CVE-2023-39320 and Go issue https://go.dev/issue/62198.
- html/template: improper handling of HTML-like comments within script contexts
The html/template package did not properly handle HMTL-like "<!--" and "-->"
comment tokens, nor hashbang "#!" comment tokens, in <script> contexts. This may
cause the template parser to improperly interpret the contents of <script>
contexts, causing actions to be improperly escaped. This could be leveraged to
perform an XSS attack.
Thanks to Takeshi Kaneko (GMO Cybersecurity by Ierae, Inc.) for reporting this
issue.
This is CVE-2023-39318 and Go issue https://go.dev/issue/62196.
- html/template: improper handling of special tags within script contexts
The html/template package did not apply the proper rules for handling occurrences
of "<script", "<!--", and "</script" within JS literals in <script> contexts.
This may cause the template parser to improperly consider script contexts to be
terminated early, causing actions to be improperly escaped. This could be
leveraged to perform an XSS attack.
Thanks to Takeshi Kaneko (GMO Cybersecurity by Ierae, Inc.) for reporting this
issue.
This is CVE-2023-39319 and Go issue https://go.dev/issue/62197.
- crypto/tls: panic when processing post-handshake message on QUIC connections
Processing an incomplete post-handshake message for a QUIC connection caused a panic.
Thanks to Marten Seemann for reporting this issue.
This is CVE-2023-39321 and CVE-2023-39322 and Go issue https://go.dev/issue/62266.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This wires up the integration tests to export spans to a jager instance.
After tests are finished it exports the data out of jaeger and uploads
as an artifact to the action run.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
I had a CI run fail to "Upload reports":
Exponential backoff for retry #1. Waiting for 4565 milliseconds before continuing the upload at offset 0
Finished backoff for retry #1, continuing with upload
Total file count: 211 ---- Processed file #160 (75.8%)
...
Total file count: 211 ---- Processed file #164 (77.7%)
Total file count: 211 ---- Processed file #164 (77.7%)
Total file count: 211 ---- Processed file #164 (77.7%)
A 503 status code has been received, will attempt to retry the upload
##### Begin Diagnostic HTTP information #####
Status Code: 503
Status Message: Service Unavailable
Header Information: {
"content-length": "592",
"content-type": "application/json; charset=utf-8",
"date": "Mon, 21 Aug 2023 14:08:10 GMT",
"server": "Kestrel",
"cache-control": "no-store,no-cache",
"pragma": "no-cache",
"strict-transport-security": "max-age=2592000",
"x-tfs-processid": "b2fc902c-011a-48be-858d-c62e9c397cb6",
"activityid": "49a48b53-0411-4ff3-86a7-4528e3f71ba2",
"x-tfs-session": "49a48b53-0411-4ff3-86a7-4528e3f71ba2",
"x-vss-e2eid": "49a48b53-0411-4ff3-86a7-4528e3f71ba2",
"x-vss-senderdeploymentid": "63be6134-28d1-8c82-e969-91f4e88fcdec",
"x-frame-options": "SAMEORIGIN"
}
###### End Diagnostic HTTP information ######
Retry limit has been reached for chunk at offset 0 to https://pipelinesghubeus5.actions.githubusercontent.com/Y2huPMnV2RyiTvKoReSyXTCrcRyxUdSDRZYoZr0ONBvpl5e9Nu/_apis/resources/Containers/8331549?itemPath=integration-reports%2Fubuntu-22.04-systemd%2Fbundles%2Ftest-integration%2FTestInfoRegistryMirrors%2Fd20ac12e48cea%2Fdocker.log
Warning: Aborting upload for /tmp/reports/ubuntu-22.04-systemd/bundles/test-integration/TestInfoRegistryMirrors/d20ac12e48cea/docker.log due to failure
Error: aborting artifact upload
Total file count: 211 ---- Processed file #165 (78.1%)
A 503 status code has been received, will attempt to retry the upload
Exponential backoff for retry #1. Waiting for 5799 milliseconds before continuing the upload at offset 0
As a result, the "Download reports" continued retrying:
...
Total file count: 1004 ---- Processed file #436 (43.4%)
Total file count: 1004 ---- Processed file #436 (43.4%)
Total file count: 1004 ---- Processed file #436 (43.4%)
An error occurred while attempting to download a file
Error: Request timeout: /Y2huPMnV2RyiTvKoReSyXTCrcRyxUdSDRZYoZr0ONBvpl5e9Nu/_apis/resources/Containers/8331549?itemPath=integration-reports%2Fubuntu-20.04%2Fbundles%2Ftest-integration%2FTestCreateWithDuplicateNetworkNames%2Fd47798cc212d1%2Fdocker.log
at ClientRequest.<anonymous> (/home/runner/work/_actions/actions/download-artifact/v3/dist/index.js:3681:26)
at Object.onceWrapper (node:events:627:28)
at ClientRequest.emit (node:events:513:28)
at TLSSocket.emitRequestTimeout (node:_http_client:839:9)
at Object.onceWrapper (node:events:627:28)
at TLSSocket.emit (node:events:525:35)
at TLSSocket.Socket._onTimeout (node:net:550:8)
at listOnTimeout (node:internal/timers:559:17)
at processTimers (node:internal/timers:502:7)
Exponential backoff for retry #1. Waiting for 5305 milliseconds before continuing the download
Total file count: 1004 ---- Processed file #436 (43.4%)
And, it looks like GitHub doesn't allow cancelling the job, possibly
because it is defined with `if: always()`?
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
There are still messy special cases (e.g. DOCKER_GITCOMMIT vs VERSION),
but this makes things a little easier to follow, as we keep
GHA-specifics in the GHA files.
Signed-off-by: Bjorn Neergaard <bjorn.neergaard@docker.com>
Includes a fix for CVE-2023-29409
go1.20.7 (released 2023-08-01) includes a security fix to the crypto/tls
package, as well as bug fixes to the assembler and the compiler. See the
Go 1.20.7 milestone on our issue tracker for details:
- https://github.com/golang/go/issues?q=milestone%3AGo1.20.7+label%3ACherryPickApproved
- full diff: https://github.com/golang/go/compare/go1.20.6...go1.20.7
From the mailing list announcement:
[security] Go 1.20.7 and Go 1.19.12 are released
Hello gophers,
We have just released Go versions 1.20.7 and 1.19.12, minor point releases.
These minor releases include 1 security fixes following the security policy:
- crypto/tls: restrict RSA keys in certificates to <= 8192 bits
Extremely large RSA keys in certificate chains can cause a client/server
to expend significant CPU time verifying signatures. Limit this by
restricting the size of RSA keys transmitted during handshakes to <=
8192 bits.
Based on a survey of publicly trusted RSA keys, there are currently only
three certificates in circulation with keys larger than this, and all
three appear to be test certificates that are not actively deployed. It
is possible there are larger keys in use in private PKIs, but we target
the web PKI, so causing breakage here in the interests of increasing the
default safety of users of crypto/tls seems reasonable.
Thanks to Mateusz Poliwczak for reporting this issue.
View the release notes for more information:
https://go.dev/doc/devel/release#go1.20.7
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Post-f8c0d92a22bad004cb9cbb4db704495527521c42, BUILDKIT_REPO doesn't
really do what it claims to. Instead, don't allow overloading since the
import path for BuildKit is always the same, and make clear the
provenance of values when generating the final variable definitions.
We also better document the script, and follow some best practices for
both POSIX sh and Bash.
Signed-off-by: Bjorn Neergaard <bjorn.neergaard@docker.com>
go1.20.6 (released 2023-07-11) includes a security fix to the net/http package,
as well as bug fixes to the compiler, cgo, the cover tool, the go command,
the runtime, and the crypto/ecdsa, go/build, go/printer, net/mail, and text/template
packages. See the Go 1.20.6 milestone on our issue tracker for details.
https://github.com/golang/go/issues?q=milestone%3AGo1.20.6+label%3ACherryPickApproved
Full diff: https://github.com/golang/go/compare/go1.20.5...go1.20.6
These minor releases include 1 security fixes following the security policy:
net/http: insufficient sanitization of Host header
The HTTP/1 client did not fully validate the contents of the Host header.
A maliciously crafted Host header could inject additional headers or entire
requests. The HTTP/1 client now refuses to send requests containing an
invalid Request.Host or Request.URL.Host value.
Thanks to Bartek Nowotarski for reporting this issue.
Includes security fixes for [CVE-2023-29406 ][1] and Go issue https://go.dev/issue/60374
[1]: https://github.com/advisories/GHSA-f8f7-69v5-w4vx
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
We can't upload the same file in a matrix so generate
metadata in prepare job instead. Also fixes wrong bake meta
file in merge job.
Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>
CI failed sometimes if no daemon.json was present:
Run sudo rm /etc/docker/daemon.json
sudo rm /etc/docker/daemon.json
sudo service docker restart
docker version
docker info
shell: /usr/bin/bash -e {0}
env:
DESTDIR: ./build
BUILDKIT_REPO: moby/buildkit
BUILDKIT_TEST_DISABLE_FEATURES: cache_backend_azblob,cache_backend_s3,merge_diff
BUILDKIT_REF: 798ad6b0ce9f2fe86dfb2b0277e6770d0b545871
rm: cannot remove '/etc/docker/daemon.json': No such file or directory
Error: Process completed with exit code 1.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
I think this may be missing a sudo (as all other operations do use
sudo to access daemon.json);
Run if [ ! -e /etc/docker/daemon.json ]; then
if [ ! -e /etc/docker/daemon.json ]; then
echo '{}' | tee /etc/docker/daemon.json >/dev/null
fi
DOCKERD_CONFIG=$(jq '.+{"experimental":true,"live-restore":true,"ipv6":true,"fixed-cidr-v6":"2001:db8:1::/64"}' /etc/docker/daemon.json)
sudo tee /etc/docker/daemon.json <<<"$DOCKERD_CONFIG" >/dev/null
sudo service docker restart
shell: /usr/bin/bash --noprofile --norc -e -o pipefail {0}
env:
GO_VERSION: 1.20.5
GOTESTLIST_VERSION: v0.3.1
TESTSTAT_VERSION: v0.1.3
ITG_CLI_MATRIX_SIZE: 6
DOCKER_EXPERIMENTAL: 1
DOCKER_GRAPHDRIVER: overlay2
tee: /etc/docker/daemon.json: Permission denied
Error: Process completed with exit code 1.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
re-enable the DCO check, which was temporarily disabled to migrate
old commits from github.com/docker/libkv
This reverts commit 7d7225fae6.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The migrated history has some commits that missed a DCO:
These commits do not have a proper 'Signed-off-by:' marker:
- 3fa22634a617e2c52d2c5f061826e5107e27985f
- 9b11053e9147884c43c9a9d8ebfcd7bb9470e8b5
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
go1.20.5 (released 2023-06-06) includes four security fixes to the cmd/go and
runtime packages, as well as bug fixes to the compiler, the go command, the
runtime, and the crypto/rsa, net, and os packages. See the Go 1.20.5 milestone
on our issue tracker for details:
https://github.com/golang/go/issues?q=milestone%3AGo1.20.5+label%3ACherryPickApproved
full diff: https://github.com/golang/go/compare/go1.20.4...go1.20.5
These minor releases include 3 security fixes following the security policy:
- cmd/go: cgo code injection
The go command may generate unexpected code at build time when using cgo. This
may result in unexpected behavior when running a go program which uses cgo.
This may occur when running an untrusted module which contains directories with
newline characters in their names. Modules which are retrieved using the go command,
i.e. via "go get", are not affected (modules retrieved using GOPATH-mode, i.e.
GO111MODULE=off, may be affected).
Thanks to Juho Nurminen of Mattermost for reporting this issue.
This is CVE-2023-29402 and Go issue https://go.dev/issue/60167.
- runtime: unexpected behavior of setuid/setgid binaries
The Go runtime didn't act any differently when a binary had the setuid/setgid
bit set. On Unix platforms, if a setuid/setgid binary was executed with standard
I/O file descriptors closed, opening any files could result in unexpected
content being read/written with elevated prilieges. Similarly if a setuid/setgid
program was terminated, either via panic or signal, it could leak the contents
of its registers.
Thanks to Vincent Dehors from Synacktiv for reporting this issue.
This is CVE-2023-29403 and Go issue https://go.dev/issue/60272.
- cmd/go: improper sanitization of LDFLAGS
The go command may execute arbitrary code at build time when using cgo. This may
occur when running "go get" on a malicious module, or when running any other
command which builds untrusted code. This is can by triggered by linker flags,
specified via a "#cgo LDFLAGS" directive.
Thanks to Juho Nurminen of Mattermost for reporting this issue.
This is CVE-2023-29404 and CVE-2023-29405 and Go issues https://go.dev/issue/60305 and https://go.dev/issue/60306.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Adds a Dockerfile and make targets to update and validate
generated files (proto, seccomp default profile)
Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>
go1.20.4 (released 2023-05-02) includes three security fixes to the html/template
package, as well as bug fixes to the compiler, the runtime, and the crypto/subtle,
crypto/tls, net/http, and syscall packages. See the Go 1.20.4 milestone on our
issue tracker for details:
https://github.com/golang/go/issues?q=milestone%3AGo1.20.4+label%3ACherryPickApproved
release notes: https://go.dev/doc/devel/release#go1.20.4
full diff: https://github.com/golang/go/compare/go1.20.3...go1.20.4
from the announcement:
> These minor releases include 3 security fixes following the security policy:
>
> - html/template: improper sanitization of CSS values
>
> Angle brackets (`<>`) were not considered dangerous characters when inserted
> into CSS contexts. Templates containing multiple actions separated by a '/'
> character could result in unexpectedly closing the CSS context and allowing
> for injection of unexpected HMTL, if executed with untrusted input.
>
> Thanks to Juho Nurminen of Mattermost for reporting this issue.
>
> This is CVE-2023-24539 and Go issue https://go.dev/issue/59720.
>
> - html/template: improper handling of JavaScript whitespace
>
> Not all valid JavaScript whitespace characters were considered to be
> whitespace. Templates containing whitespace characters outside of the character
> set "\t\n\f\r\u0020\u2028\u2029" in JavaScript contexts that also contain
> actions may not be properly sanitized during execution.
>
> Thanks to Juho Nurminen of Mattermost for reporting this issue.
>
> This is CVE-2023-24540 and Go issue https://go.dev/issue/59721.
>
> - html/template: improper handling of empty HTML attributes
>
> Templates containing actions in unquoted HTML attributes (e.g. "attr={{.}}")
> executed with empty input could result in output that would have unexpected
> results when parsed due to HTML normalization rules. This may allow injection
> of arbitrary attributes into tags.
>
> Thanks to Juho Nurminen of Mattermost for reporting this issue.
>
> This is CVE-2023-29400 and Go issue https://go.dev/issue/59722.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
go1.20.3 (released 2023-04-04) includes security fixes to the go/parser,
html/template, mime/multipart, net/http, and net/textproto packages, as well
as bug fixes to the compiler, the linker, the runtime, and the time package.
See the Go 1.20.3 milestone on our issue tracker for details:
https://github.com/golang/go/issues?q=milestone%3AGo1.20.3+label%3ACherryPickApproved
full diff: https://github.com/golang/go/compare/go1.20.2...go1.20.3
Further details from the announcement on the mailing list:
We have just released Go versions 1.20.3 and 1.19.8, minor point releases.
These minor releases include 4 security fixes following the security policy:
- go/parser: infinite loop in parsing
Calling any of the Parse functions on Go source code which contains `//line`
directives with very large line numbers can cause an infinite loop due to
integer overflow.
Thanks to Philippe Antoine (Catena cyber) for reporting this issue.
This is CVE-2023-24537 and Go issue https://go.dev/issue/59180.
- html/template: backticks not treated as string delimiters
Templates did not properly consider backticks (`) as Javascript string
delimiters, and as such did not escape them as expected. Backticks are
used, since ES6, for JS template literals. If a template contained a Go
template action within a Javascript template literal, the contents of the
action could be used to terminate the literal, injecting arbitrary Javascript
code into the Go template.
As ES6 template literals are rather complex, and themselves can do string
interpolation, we've decided to simply disallow Go template actions from being
used inside of them (e.g. "var a = {{.}}"), since there is no obviously safe
way to allow this behavior. This takes the same approach as
github.com/google/safehtml. Template.Parse will now return an Error when it
encounters templates like this, with a currently unexported ErrorCode with a
value of 12. This ErrorCode will be exported in the next major release.
Users who rely on this behavior can re-enable it using the GODEBUG flag
jstmpllitinterp=1, with the caveat that backticks will now be escaped. This
should be used with caution.
Thanks to Sohom Datta, Manipal Institute of Technology, for reporting this issue.
This is CVE-2023-24538 and Go issue https://go.dev/issue/59234.
- net/http, net/textproto: denial of service from excessive memory allocation
HTTP and MIME header parsing could allocate large amounts of memory, even when
parsing small inputs.
Certain unusual patterns of input data could cause the common function used to
parse HTTP and MIME headers to allocate substantially more memory than
required to hold the parsed headers. An attacker can exploit this behavior to
cause an HTTP server to allocate large amounts of memory from a small request,
potentially leading to memory exhaustion and a denial of service.
Header parsing now correctly allocates only the memory required to hold parsed
headers.
Thanks to Jakob Ackermann (@das7pad) for discovering this issue.
This is CVE-2023-24534 and Go issue https://go.dev/issue/58975.
- net/http, net/textproto, mime/multipart: denial of service from excessive resource consumption
Multipart form parsing can consume large amounts of CPU and memory when
processing form inputs containing very large numbers of parts. This stems from
several causes:
mime/multipart.Reader.ReadForm limits the total memory a parsed multipart form
can consume. ReadForm could undercount the amount of memory consumed, leading
it to accept larger inputs than intended. Limiting total memory does not
account for increased pressure on the garbage collector from large numbers of
small allocations in forms with many parts. ReadForm could allocate a large
number of short-lived buffers, further increasing pressure on the garbage
collector. The combination of these factors can permit an attacker to cause an
program that parses multipart forms to consume large amounts of CPU and
memory, potentially resulting in a denial of service. This affects programs
that use mime/multipart.Reader.ReadForm, as well as form parsing in the
net/http package with the Request methods FormFile, FormValue,
ParseMultipartForm, and PostFormValue.
ReadForm now does a better job of estimating the memory consumption of parsed
forms, and performs many fewer short-lived allocations.
In addition, mime/multipart.Reader now imposes the following limits on the
size of parsed forms:
Forms parsed with ReadForm may contain no more than 1000 parts. This limit may
be adjusted with the environment variable GODEBUG=multipartmaxparts=. Form
parts parsed with NextPart and NextRawPart may contain no more than 10,000
header fields. In addition, forms parsed with ReadForm may contain no more
than 10,000 header fields across all parts. This limit may be adjusted with
the environment variable GODEBUG=multipartmaxheaders=.
Thanks to Jakob Ackermann for discovering this issue.
This is CVE-2023-24536 and Go issue https://go.dev/issue/59153.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
