| Name | CVE-2021-23177 |
| Description | An improper link resolution flaw while extracting an archive can lead to changing the access control list (ACL) of the target of the link. 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 change the ACL of a file on the system and gain more privileges. |
| 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, ELA-603-1 |
| Debian Bugs | 1001986 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| libarchive (PTS) | jessie, jessie (lts) | 3.1.2-11+deb8u11 | fixed |
| stretch (security) | 3.2.2-2+deb9u3 | fixed | |
| stretch (lts), stretch | 3.2.2-2+deb9u4 | fixed | |
| buster (security), buster, buster (lts) | 3.3.3-4+deb10u3 | fixed | |
| bullseye | 3.4.3-2+deb11u1 | fixed | |
| bookworm (security), bookworm | 3.6.2-1+deb12u1 | fixed | |
| trixie | 3.7.4-1 | fixed | |
| sid | 3.7.4-1.1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| libarchive | source | jessie | 3.1.2-11+deb8u9 | ELA-603-1 | ||
| 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 | 1001986 |
https://github.com/libarchive/libarchive/issues/1565
https://github.com/libarchive/libarchive/commit/fba4f123cc456d2b2538f811bb831483bf336bad (v3.5.2)