CVE-2022-1473

Name	CVE-2022-1473
Description	The OPENSSL_LH_flush() function, which empties a hash table, contains a bug that breaks reuse of the memory occuppied by the removed hash table entries. This function is used when decoding certificates or keys. If a long lived process periodically decodes certificates or keys its memory usage will expand without bounds and the process might be terminated by the operating system causing a denial of service. Also traversing the empty hash table entries will take increasingly more time. Typically such long lived processes might be TLS clients or TLS servers configured to accept client certificate authentication. The function was added in the OpenSSL 3.0 version thus older releases are not affected by the issue. Fixed in OpenSSL 3.0.3 (Affected 3.0.0,3.0.1,3.0.2).
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
openssl (PTS)	jessie, jessie (lts)	1.0.1t-1+deb8u21	fixed
	stretch (security)	1.1.0l-1~deb9u6	fixed
	stretch (lts), stretch	1.1.0l-1~deb9u9	fixed
	buster (security), buster, buster (lts)	1.1.1n-0+deb10u6	fixed
	bullseye	1.1.1w-0+deb11u1	fixed
	bullseye (security)	1.1.1w-0+deb11u2	fixed
	bookworm	3.0.15-1~deb12u1	fixed
	bookworm (security)	3.0.14-1~deb12u2	fixed
	sid, trixie	3.3.2-2	fixed
openssl1.0 (PTS)	stretch (security)	1.0.2u-1~deb9u7	fixed
	stretch (lts), stretch	1.0.2u-1~deb9u9	fixed

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

Package	Type	Release	Fixed Version
openssl	source	experimental	3.0.3-1
openssl	source	(unstable)	(not affected)
openssl1.0	source	(unstable)	(not affected)

Notes

- openssl <not-affected> (Only affects OpenSSL 3.0)
https://www.openssl.org/news/secadv/20220503.txt
https://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=64c85430f95200b6b51fe9475bd5203f7c19daf1 (openssl-3.0.3)
- openssl1.0 <not-affected> (Vulnerable code introduced later in version 3.0)