CVE-2018-20969: OS Command Injection
First published: Fri Aug 16 2019(Updated: )
A vulnerability was found in 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 <a href="https://access.redhat.com/security/cve/CVE-2019-13638">CVE-2019-13638</a>, but the ! syntax is specific to ed, and is unrelated to a shell metacharacter. Reference: <a href="https://git.savannah.gnu.org/cgit/patch.git/commit/?id=3fcd042d26d70856e826a42b5f93dc4854d80bf0">https://git.savannah.gnu.org/cgit/patch.git/commit/?id=3fcd042d26d70856e826a42b5f93dc4854d80bf0</a> <a href="https://seclists.org/bugtraq/2019/Aug/29">https://seclists.org/bugtraq/2019/Aug/29</a>
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GNU patch | <=2.7.6 |
Remedy
https://git.savannah.gnu.org/cgit/patch.git/commit/?id=3fcd042d26d70856e826a42b5f93dc4854d80bf0
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Reference Links
- http://packetstormsecurity.com/files/154124/GNU-patch-Command-Injection-Directory-Traversal.html
- https://access.redhat.com/errata/RHSA-2019:2798
- https://access.redhat.com/errata/RHSA-2019:2964
- https://access.redhat.com/errata/RHSA-2019:3757
- https://access.redhat.com/errata/RHSA-2019:3758
- https://access.redhat.com/errata/RHSA-2019:4061
- https://git.savannah.gnu.org/cgit/patch.git/commit/?id=3fcd042d26d70856e826a42b5f93dc4854d80bf0
- https://github.com/irsl/gnu-patch-vulnerabilities
- https://seclists.org/bugtraq/2019/Aug/29
- https://access.redhat.com/security/cve/CVE-2019-13638
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1746673
- https://access.redhat.com/security/cve/cve-2018-20969
- https://bugzilla.redhat.com/show_bug.cgi?id=1746672
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- version/gnu patch/2.7.6