CVE-2018-0732

Name	CVE-2018-0732
Description	During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This could be exploited in a Denial Of Service attack. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o).
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-1449-1, DSA-4348-1, DSA-4355-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
openssl (PTS)	buster	1.1.1n-0+deb10u3	fixed
	buster (security)	1.1.1n-0+deb10u4	fixed
	bullseye	1.1.1n-0+deb11u4	fixed
	bullseye (security)	1.1.1n-0+deb11u5	fixed
	bookworm	3.0.8-1	fixed
	sid	3.0.9-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin
openssl	source	jessie	1.0.1t-1+deb8u9		DLA-1449-1
openssl	source	stretch	1.1.0j-1~deb9u1		DSA-4348-1
openssl	source	(unstable)	1.1.1-1	low
openssl1.0	source	stretch	1.0.2q-1~deb9u1		DSA-4355-1
openssl1.0	source	(unstable)	1.0.2q-1	low

Notes

OpenSSL_1_1_0-stable: https://git.openssl.org/?p=openssl.git;a=commit;h=ea7abeeabf92b7aca160bdd0208636d4da69f4f4
OpenSSL_1_0_2-stable: https://git.openssl.org/?p=openssl.git;a=commit;h=3984ef0b72831da8b3ece4745cac4f8575b19098
https://www.openssl.org/news/secadv/20180612.txt