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HIGH

libseccomp-golang: mishandling of multiple argument rules leading to a bypass of intended access restrictions

Published Apr 24, 2019

Description

libseccomp-golang 0.9.0 and earlier incorrectly generates BPFs that OR multiple arguments rather than ANDing them. A process running under a restrictive seccomp filter that specified multiple syscall arguments could bypass intended access restrictions by specifying a single matching argument.

Affected products

Remediation

Red Hat statement

This issue may affect OpenShift Container Platform 3.x and 4.x if you are providing a custom Seccomp profile using Security Context Constraints [1]. The custom Seccomp profile would need to specify multiple arguments, such as below, from [2]. { "names": [ "socketcall" ], "action": "SCMP_ACT_ALLOW", "args": [ { "index": 0, "value": 1, "valueTwo": 0, "op": "SCMP_CMP_EQ" }, { "index": 1, "value": 1, "valueTwo": 0, "op": "SCMP_CMP_EQ" } ], "comment": "", "includes": {}, "excludes": {} }, If such a profile was used the arguments could be combined as an OR rule, not AND, as the user might expect from Seccomp. [1] https://docs.openshift.com/container-platform/4.1/authentication/managing-security-context-constraints.html [2] https://github.com/moby/moby/issues/32714#issuecomment-295532163

Metrics

Weaknesses (3)

CWE-20

Improper Input Validation

CWE-284

CWE-305

References (12)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Apr 24, 2019
Updated Aug 5, 2024
Reserved Apr 24, 2019
Link CVE-2017-18367
CISA Vulnrichment
Updated n/a
NVD
Status Modified
Modified Jun 17, 2026
Link CVE-2017-18367
Red Hat
Severity Moderate
Public date Apr 24, 2019
Links CVE-2017-18367 - Bugzilla
GHSA-58V3-J75H-XR49