CVE-2020-25657

Name	CVE-2020-25657
Description	A flaw was found in all released versions of m2crypto, where they are vulnerable to Bleichenbacher timing attacks in the RSA decryption API via the timed processing of valid PKCS#1 v1.5 Ciphertext. The highest threat from this vulnerability is to confidentiality.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severity	medium
Debian Bugs	975002

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
m2crypto (PTS)	stretch	0.24.0-1.1	vulnerable
	buster	0.31.0-4+deb10u1	vulnerable
	bullseye	0.37.1-1	vulnerable
	sid	0.37.1-2	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
m2crypto	source	(unstable)	(unfixed)			975002

Notes

[bullseye] - m2crypto <no-dsa> (Minor issue)
[buster] - m2crypto <no-dsa> (Minor issue)
[stretch] - m2crypto <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=1889823
https://gitlab.com/m2crypto/m2crypto/-/issues/285
https://gitlab.com/m2crypto/m2crypto/-/issues/282 (restricted)