CVE-2024-5742: Nano: running `chmod` and `chown` on the filename allows malicious user to replace the emergency file with a malicious symlink to a root-owned file
First published: Thu May 02 2024(Updated: )
A vulnerability was found in GNU Nano that allows a possible privilege escalation through an insecure temporary file. If Nano is killed while editing, a file it saves to an emergency file with the permissions of the running user provides a window of opportunity for attackers to escalate privileges through a malicious symlink.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/nano | <8.0 | 8.0 |
| debian/nano | 5.4-2+deb11u3 7.2-1+deb12u1 8.3-1 | |
| GNU nano | >=2.2.0<8.0 | |
| Red Hat Enterprise Linux | =6.0 | |
| Red Hat Enterprise Linux | =7.0 | |
| Red Hat Enterprise Linux | =8.0 | |
| Red Hat Enterprise Linux | =9.0 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2277586
- https://git.savannah.gnu.org/cgit/nano.git/commit/?id=5e7a3c2e7e118c7f12d5dfda9f9140f638976aa2
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2290866
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2290867
- https://git.savannah.gnu.org/cgit/nano.git/commit/?id=ce5513b009a4c639d3a0b057fa0de94cd82e14e4
- https://access.redhat.com/errata/RHSA-2024:6986
- https://bugzilla.redhat.com/show_bug.cgi?id=2278574
- https://access.redhat.com/security/cve/CVE-2024-5742
- https://lists.debian.org/debian-lts-announce/2024/06/msg00006.html
- https://launchpad.net/bugs/cve/CVE-2024-5742
- https://git.savannah.gnu.org/cgit/nano.git/commit/?id=123110c5dc3e0d8c60a4ff0121056e301f503706
- https://security-tracker.debian.org/tracker/CVE-2024-5742
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-5742
- https://nvd.nist.gov/vuln/detail/CVE-2024-5742
- https://ubuntu.com/security/CVE-2024-5742
- https://access.redhat.com/errata/RHSA-2024:9430
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