CVE-2021-25635

Name	CVE-2021-25635
Description	An Improper Certificate Validation vulnerability in LibreOffice allowed an attacker to self sign an ODF document, with a signature untrusted by the target, then modify it to change the signature algorithm to an invalid (or unknown to LibreOffice) algorithm and LibreOffice would incorrectly present such a signature with an unknown algorithm as a valid signature issued by a trusted person This issue affects LibreOffice: from 7.0 before 7.0.5, from 7.1 before 7.1.1.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, 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
libreoffice (PTS)	bullseye	1:7.0.4-4+deb11u10	fixed
	bullseye (security)	1:7.0.4-4+deb11u12	fixed
	bookworm, bookworm (security)	4:7.4.7-1+deb12u7	fixed
	trixie	4:25.2.2-1	fixed
	sid	4:25.2.2-2	fixed

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

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

Notes

- libreoffice <not-affected> (Only affects Microsoft Crypto API back-end)
https://www.libreoffice.org/about-us/security/advisories/CVE-2021-25635
https://www.openwall.com/lists/oss-security/2021/10/11/3
Fixed by: https://github.com/LibreOffice/core/commit/edeb164c1d8ab64116afee4e2140403a362a1358 (7-0)
Fixed by: https://github.com/LibreOffice/core/commit/a5fe0bea138c5b32268a5cd0093908909d8bc013 (7-1)