CVE-2015-1793

Priority
Medium
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.
References
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1793
https://mta.openssl.org/pipermail/openssl-announce/2015-July/000037.html
https://www.openssl.org/news/secadv_20150709.txt
Notes
 mdeslaur> introduced by the following commit in 1.0.2b and 1.0.1n:
 mdeslaur> https://git.openssl.org/?p=openssl.git;a=commit;h=6281abc79623419eae6a64768c478272d5d3a426
Assigned-to
mdeslaur
Package
Source: openssl098 (LP Ubuntu Debian)
Upstream:needs-triage
Ubuntu 14.04 LTS (Trusty Tahr):not-affected
Package
Source: openssl (LP Ubuntu Debian)
Upstream:needs-triage
Ubuntu 14.04 LTS (Trusty Tahr):not-affected (1.0.1f-1ubuntu2.15)
More Information

Updated: 2017-12-14 20:04:19 UTC (commit 13907)