| Name | CVE-2023-30571 |
| Description | Libarchive through 3.6.2 can cause directories to have world-writable permissions. The umask() call inside archive_write_disk_posix.c changes the umask of the whole process for a very short period of time; a race condition with another thread can lead to a permanent umask 0 setting. Such a race condition could lead to implicit directory creation with permissions 0777 (without the sticky bit), which means that any low-privileged local user can delete and rename files inside those directories. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1037093 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libarchive (PTS) | bullseye | 3.4.3-2+deb11u1 | vulnerable |
| bullseye (security) | 3.4.3-2+deb11u2 | vulnerable |
| bookworm | 3.6.2-1+deb12u1 | vulnerable |
| bookworm (security) | 3.6.2-1+deb12u2 | vulnerable |
| sid, trixie | 3.7.4-1.1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| libarchive | source | (unstable) | (unfixed) | unimportant | | 1037093 |
Notes
https://github.com/libarchive/libarchive/issues/1876
libarchive does not officially support multi-threaded use archive_read_disk
and archive_write_disk API functions. Upstream aims to clarify the documentation:
https://github.com/libarchive/libarchive/issues/1876#issuecomment-1627767567
We'll use the first version to include the documentation update as fixed version