OS Command Injection Affecting patch package, versions <0:2.7.1-12.el7_7
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-RHEL7-PATCH-4956340
- published26 Jul 2021
- disclosed16 Aug 2019
Introduced: 16 Aug 2019
CVE-2018-20969 (opens in a new tab)How to fix?
Upgrade RHEL:7 patch to version 0:2.7.1-12.el7_7 or higher.
This issue was patched in RHSA-2019:2964.
NVD Description
Note: Versions mentioned in the description apply only to the upstream patch package and not the patch package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
do_ed_script in pch.c in GNU patch through 2.7.6 does not block strings beginning with a ! character. NOTE: this is the same commit as for CVE-2019-13638, but the ! syntax is specific to ed, and is unrelated to a shell metacharacter.
References
- https://seclists.org/bugtraq/2019/Aug/29
- https://access.redhat.com/security/cve/CVE-2018-20969
- http://packetstormsecurity.com/files/154124/GNU-patch-Command-Injection-Directory-Traversal.html
- https://github.com/irsl/gnu-patch-vulnerabilities
- https://git.savannah.gnu.org/cgit/patch.git/commit/?id=3fcd042d26d70856e826a42b5f93dc4854d80bf0
- https://access.redhat.com/errata/RHSA-2019:2964