CVE-2018-9860

Name	CVE-2018-9860
Description	An issue was discovered in Botan 1.11.32 through 2.x before 2.6.0. An off-by-one error when processing malformed TLS-CBC ciphertext could cause the receiving side to include in the HMAC computation exactly 64K bytes of data following the record buffer, aka an over-read. The MAC comparison will subsequently fail and the connection will be closed. This could be used for denial of service. No information leak occurs.
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

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
botan (PTS)	buster	2.9.0-2	fixed
	bullseye	2.17.3+dfsg-2	fixed
	bookworm, sid	2.18.2+dfsg-1	fixed
botan1.10 (PTS)	stretch	1.10.16-1	fixed
	stretch (security)	1.10.17-1+deb9u1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
botan	source	(unstable)	2.4.0-6
botan1.10	source	(unstable)	(not affected)

Notes

- botan1.10 <not-affected> (Issue introduced in 1.11.32)
https://github.com/randombit/botan/commit/ec222c99719c396a1f4756b2ca345dbbfbeb5ed5
Bug introduced in 1.11.32, fixed in 2.6.0