CVE-2022-45939: OS Command Injection
First published: Mon Nov 28 2022(Updated: )
GNU Emacs through 28.2 allows attackers to execute commands via shell metacharacters in the name of a source-code file, because lib-src/etags.c uses the system C library function in its implementation of the ctags program. For example, a victim may use the "ctags *" command (suggested in the ctags documentation) in a situation where the current working directory has contents that depend on untrusted input.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GNU Emacs | <=28.2 | |
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =11.0 | |
| Fedoraproject Fedora | =36 | |
| Fedoraproject Fedora | =37 | |
| debian/emacs | 1:27.1+1-3.1+deb11u5 1:28.2+1-15+deb12u3 1:29.4+1-3 | |
| debian/xemacs21 | <=21.4.24-9 | 21.4.24-11 21.4.24-12 |
| <=28.2 | ||
| =10.0 | ||
| =11.0 | ||
| =36 | ||
| =37 |
Remedy
https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=d48bb4874bc6cd3e69c7a15fc3c91cc141025c51
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Reference Links
- https://security-tracker.debian.org/tracker/CVE-2022-45939
- https://www.cve.org/CVERecord?id=CVE-2022-45939
- https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=d48bb4874bc6cd3e69c7a15fc3c91cc141025c51
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1025009
- https://lists.debian.org/debian-lts-announce/2022/12/msg00046.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FOSK3J7BBAEI4IITW2DRUKLQYUZYKH6Y/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GOXIH2FDEQJEAARE52C3GHTLGQFBYPIB/
- https://www.debian.org/security/2023/dsa-5314
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2149381
- https://access.redhat.com/errata/RHSA-2023:2366
- https://access.redhat.com/errata/RHSA-2023:3042
- https://access.redhat.com/security/cve/cve-2022-45939
- https://access.redhat.com/errata/RHSA-2024:1103
- https://bugzilla.redhat.com/show_bug.cgi?id=2149380
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GOXIH2FDEQJEAARE52C3GHTLGQFBYPIB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FOSK3J7BBAEI4IITW2DRUKLQYUZYKH6Y/
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-45939
- https://nvd.nist.gov/vuln/detail/CVE-2022-45939
- https://launchpad.net/bugs/cve/CVE-2022-45939
- https://ubuntu.com/security/CVE-2022-45939
Frequently Asked Questions
What is CVE-2022-45939?
CVE-2022-45939 is a vulnerability in GNU Emacs that allows attackers to execute commands through shell metacharacters in the name of a source-code file.
How does CVE-2022-45939 affect GNU Emacs?
CVE-2022-45939 affects GNU Emacs versions up to 28.2.
How does CVE-2022-45939 affect Debian Linux?
CVE-2022-45939 affects Debian Linux versions 10.0 and 11.0.
How does CVE-2022-45939 affect Fedora Linux?
CVE-2022-45939 affects Fedora Linux versions 36 and 37.
How can I fix CVE-2022-45939 in GNU Emacs?
To fix CVE-2022-45939 in GNU Emacs, update to version 28.3 or later.
How can I fix CVE-2022-45939 in Debian Linux?
To fix CVE-2022-45939 in Debian Linux, apply the recommended security updates.
How can I fix CVE-2022-45939 in Fedora Linux?
To fix CVE-2022-45939 in Fedora Linux, update to a version that includes the security patch.
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