CVE-2015-1793

NameCVE-2015-1793
DescriptionThe 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.
SourceCVE (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 PackageReleaseVersionStatus
openssl (PTS)buster, buster (security)1.1.1n-0+deb10u3fixed
bullseye (security), bullseye1.1.1n-0+deb11u3fixed
bookworm3.0.5-2fixed
sid3.0.5-4fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
opensslsourcesqueeze(not affected)
opensslsourcewheezy(not affected)
opensslsourcejessie(not affected)
opensslsource(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

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