CVE-2023-0401

Name	CVE-2023-0401
Description	A NULL pointer can be dereferenced when signatures are being verified on PKCS7 signed or signedAndEnveloped data. In case the hash algorithm used for the signature is known to the OpenSSL library but the implementation of the hash algorithm is not available the digest initialization will fail. There is a missing check for the return value from the initialization function which later leads to invalid usage of the digest API most likely leading to a crash. The unavailability of an algorithm can be caused by using FIPS enabled configuration of providers or more commonly by not loading the legacy provider. PKCS7 data is processed by the SMIME library calls and also by the time stamp (TS) library calls. The TLS implementation in OpenSSL does not call these functions however third party applications would be affected if they call these functions to verify signatures on untrusted data.
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)	buster	1.1.1n-0+deb10u3	fixed
	buster (security)	1.1.1n-0+deb10u6	fixed
	bullseye	1.1.1w-0+deb11u1	fixed
	bullseye (security)	1.1.1n-0+deb11u5	fixed
	bookworm, bookworm (security)	3.0.11-1~deb12u2	fixed
	trixie	3.1.5-1	fixed
	sid	3.2.1-3	fixed

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

Package	Type	Release	Fixed Version
openssl	source	buster	(not affected)
openssl	source	bullseye	(not affected)
openssl	source	(unstable)	3.0.8-1

Notes

[bullseye] - openssl <not-affected> (Only affects 3.x)
[buster] - openssl <not-affected> (Only affects 3.x)
https://www.openssl.org/news/secadv/20230207.txt
https://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=d3b6dfd70db844c4499bec6ad6601623a565e674 (openssl-3.0.8)