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CVE-2021-36976

Published: 20 July 2021

libarchive 3.4.1 through 3.5.1 has a use-after-free in copy_string (called from do_uncompress_block and process_block).

Priority

Medium

CVSS 3 base score: 6.5

Status

Package Release Status
libarchive
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 21.10 (Impish Indri) Deferred
(2021-11-08)
Ubuntu 21.04 (Hirsute Hippo) Deferred
(2021-11-08)
Ubuntu 20.04 LTS (Focal Fossa) Deferred
(2021-11-08)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(code not present)
Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(code not present)
Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable
(code not present)
Patches:
Upstream: https://github.com/libarchive/libarchive/pull/1491
Upstream: https://github.com/libarchive/libarchive/pull/1492

Notes

AuthorNote
leosilva
as of 2021-11-08, fix is still incomplete
mdeslaur
introduced by:
https://github.com/libarchive/libarchive/commit/47bb8187d3ef2d49ee8c7841cb2872b3cfa1f6f7
this was backported by the upstream-rar-window-mask.patch patch
in focal

References

Bugs