CVE-2015-2318

Name	CVE-2015-2318
Description	The TLS stack in Mono before 3.12.1 allows man-in-the-middle attackers to conduct message skipping attacks and consequently impersonate clients by leveraging missing handshake state validation, aka a "SMACK SKIP-TLS" issue.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
References	DLA-176-1, DSA-3202-1
Debian Bugs	780751

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
mono (PTS)	buster	5.18.0.240+dfsg-3	fixed
	buster (security)	5.18.0.240+dfsg-3+deb10u1	fixed
	bullseye	6.8.0.105+dfsg-3.3~deb11u1	fixed
	bookworm, sid	6.8.0.105+dfsg-3.3	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
mono	source	squeeze	2.6.7-5.1+deb6u1	DLA-176-1
mono	source	wheezy	2.10.8.1-8+deb7u1	DSA-3202-1
mono	source	(unstable)	3.2.8+dfsg-10		780751

Notes

https://github.com/mono/mono/commit/1509226c41d74194c146deb173e752b8d3cdeec4
Patch for versions earlier than 3.4: https://gist.github.com/directhex/f8c6e67f551d8a608154