CVE-2020-25648

Name	CVE-2020-25648
Description	A flaw was found in the way NSS handled CCS (ChangeCipherSpec) messages in TLS 1.3. This flaw allows a remote attacker to send multiple CCS messages, causing a denial of service for servers compiled with the NSS library. The highest threat from this vulnerability is to system availability. This flaw affects NSS versions before 3.58.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-3634-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
nss (PTS)	bullseye	2:3.61-1+deb11u3	fixed
	bullseye (security)	2:3.61-1+deb11u4	fixed
	bookworm, bookworm (security)	2:3.87.1-1+deb12u1	fixed
	trixie	2:3.110-1	fixed
	forky, sid	2:3.117-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
nss	source	buster	2:3.42.1-1+deb10u7		DLA-3634-1
nss	source	(unstable)	2:3.58-1

Notes

[stretch] - nss <no-dsa> (Minor issue)
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.58_release_notes
https://bugzilla.mozilla.org/show_bug.cgi?id=1641480 (private)
Fixed by: https://hg.mozilla.org/projects/nss/rev/57bbefa793232586d27cee83e74411171e128361