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fix multizone multivar (#2727)

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Thibault "bui" Koechlin 2024-01-12 10:11:13 +01:00 committed by GitHub
parent aa4f02c798
commit adba4e2a2f
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 33 additions and 1 deletions
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29
pkg/appsec/appsec_rule/modsec_rule_test.go
View file

@ -18,6 +18,16 @@ func TestVPatchRuleString(t *testing.T) {
},
expected: `SecRule ARGS_GET:foo "@rx [^a-zA-Z]" "id:2203944045,phase:2,deny,log,msg:'Base Rule',tag:'crowdsec-Base Rule',t:lowercase"`,
},
{
name: "One zone, multi var",
rule: CustomRule{
Zones: []string{"ARGS"},
Variables: []string{"foo", "bar"},
Match: match{Type: "regex", Value: "[^a-zA-Z]"},
Transform: []string{"lowercase"},
},
expected: `SecRule ARGS_GET:foo|ARGS_GET:bar "@rx [^a-zA-Z]" "id:385719930,phase:2,deny,log,msg:'One zone, multi var',tag:'crowdsec-One zone, multi var',t:lowercase"`,
},
{
name: "Base Rule #2",
rule: CustomRule{
@ -44,6 +54,25 @@ func TestVPatchRuleString(t *testing.T) {
},
expected: `SecRule ARGS_GET:foo|ARGS_POST:foo "@rx [^a-zA-Z]" "id:3387135861,phase:2,deny,log,msg:'Multiple Zones',tag:'crowdsec-Multiple Zones',t:lowercase"`,
},
{
name: "Multiple Zones Multi Var",
rule: CustomRule{
Zones: []string{"ARGS", "BODY_ARGS"},
Variables: []string{"foo", "bar"},
Match: match{Type: "regex", Value: "[^a-zA-Z]"},
Transform: []string{"lowercase"},
},
expected: `SecRule ARGS_GET:foo|ARGS_GET:bar|ARGS_POST:foo|ARGS_POST:bar "@rx [^a-zA-Z]" "id:1119773585,phase:2,deny,log,msg:'Multiple Zones Multi Var',tag:'crowdsec-Multiple Zones Multi Var',t:lowercase"`,
},
{
name: "Multiple Zones No Vars",
rule: CustomRule{
Zones: []string{"ARGS", "BODY_ARGS"},
Match: match{Type: "regex", Value: "[^a-zA-Z]"},
Transform: []string{"lowercase"},
},
expected: `SecRule ARGS_GET|ARGS_POST "@rx [^a-zA-Z]" "id:2020110336,phase:2,deny,log,msg:'Multiple Zones No Vars',tag:'crowdsec-Multiple Zones No Vars',t:lowercase"`,
},
{
name: "Basic AND",
rule: CustomRule{

5
pkg/appsec/appsec_rule/modsecurity.go
View file

@ -123,6 +123,9 @@ func (m *ModsecurityRule) buildRules(rule *CustomRule, appsecRuleName string, an
}
for idx, zone := range rule.Zones {
if idx > 0 {
r.WriteByte('|')
}
mappedZone, ok := zonesMap[zone]
if !ok {
return nil, fmt.Errorf("unknown zone '%s'", zone)
@ -131,7 +134,7 @@ func (m *ModsecurityRule) buildRules(rule *CustomRule, appsecRuleName string, an
r.WriteString(mappedZone)
} else {
for j, variable := range rule.Variables {
if idx > 0 || j > 0 {
if j > 0 {
r.WriteByte('|')
}
r.WriteString(fmt.Sprintf("%s:%s", mappedZone, variable))