CVE-2015-1793

Name	CVE-2015-1793
Description	The X509_verify_cert function in crypto/x509/x509_vfy.c in OpenSSL 1.0.1n, 1.0.1o, 1.0.2b, and 1.0.2c does not properly process X.509 Basic Constraints cA values during identification of alternative certificate chains, which allows remote attackers to spoof a Certification Authority role and trigger unintended certificate verifications via a valid leaf certificate.
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)

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 (security), bullseye	1.1.1n-0+deb11u4	fixed
	bookworm, sid	3.0.8-1	fixed

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

Package	Type	Release	Fixed Version
openssl	source	squeeze	(not affected)
openssl	source	wheezy	(not affected)
openssl	source	jessie	(not affected)
openssl	source	(unstable)	1.0.2d-1

Notes

[jessie] - openssl <not-affected> (Vulnerable code not present)
[wheezy] - openssl <not-affected> (Vulnerable code not present)
[squeeze] - openssl <not-affected> (Vulnerable code not present)
http://openssl.org/news/secadv/20150709.txt