| Name | CVE-2021-31566 |
| Description | An improper link resolution flaw can occur while extracting an archive leading to changing modes, times, access control lists, and flags of a file outside of the archive. An attacker may provide a malicious archive to a victim user, who would trigger this flaw when trying to extract the archive. A local attacker may use this flaw to gain more privileges in a system. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2987-1, DLA-3202-1 |
| Debian Bugs | 1001990 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| libarchive (PTS) | buster | 3.3.3-4+deb10u1 | vulnerable |
| buster (security) | 3.3.3-4+deb10u3 | fixed | |
| bullseye | 3.4.3-2+deb11u1 | fixed | |
| bookworm | 3.6.2-1 | fixed | |
| sid, trixie | 3.7.2-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| libarchive | source | stretch | 3.2.2-2+deb9u3 | DLA-2987-1 | ||
| libarchive | source | buster | 3.3.3-4+deb10u2 | DLA-3202-1 | ||
| libarchive | source | bullseye | 3.4.3-2+deb11u1 | |||
| libarchive | source | (unstable) | 3.5.2-1 | 1001990 |
https://github.com/libarchive/libarchive/issues/1566
https://github.com/libarchive/libarchive/commit/b41daecb5ccb4c8e3b2c53fd6147109fc12c3043 (v3.5.2)
https://github.com/libarchive/libarchive/commit/e2ad1a2c3064fa9eba6274b3641c4c1beed25c0b (v3.5.2)