GLSA-201507-15 : OpenSSL: Alternate chains certificate forgery
Medium Nessus Plugin ID 86084
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-201507-15 (OpenSSL: Alternate chains certificate forgery)
During certificate verification, OpenSSL attempts to find an alternative certificate chain if the first attempt to build such a chain fails.
A remote attacker could cause certain checks on untrusted certificates to be bypassed, such as the CA flag, enabling them to use a valid leaf certificate to act as a CA and “issue” an invalid certificate.
There is no known workaround at this time.
SolutionAll OpenSSL users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=dev-libs/openssl-1.0.1p'