CVE-2020-21674

Name	CVE-2020-21674
Description	Heap-based buffer overflow in archive_string_append_from_wcs() (archive_string.c) in libarchive-3.4.1dev allows remote attackers to cause a denial of service (out-of-bounds write in heap memory resulting into a crash) via a crafted archive file. NOTE: this only affects users who downloaded the development code from GitHub. Users of the product's official releases are unaffected.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libarchive (PTS)	bookworm	3.6.2-1+deb12u4	fixed
	bookworm (security)	3.6.2-1+deb12u5	fixed
	trixie	3.7.4-4+deb13u1	fixed
	forky, sid	3.8.9-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libarchive	source	(unstable)	(not affected)

Notes

- libarchive <not-affected> (Vulnerable code not present in a released version)
https://github.com/libarchive/libarchive/issues/1298
Introduced (around): https://github.com/libarchive/libarchive/commit/3566a5d6ba2458e68c7e42b23f00a57901c6eafb
Fixed by: https://github.com/libarchive/libarchive/commit/4f085eea879e2be745f4d9bf57e8513ae48157f4 (v3.4.1)