CVE-2010-1155

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2010-04-16 · updated 2026-06-16
Weakness: CWE-20

Description

Irssi before 0.8.15, when SSL is used, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) field or a Subject Alternative Name field of the X.509 certificate, which allows man-in-the-middle attackers to spoof IRC servers via an arbitrary certificate.

Affected products

Irssi: through 0.8.15; 0.8.0, 0.8.1, 0.8.2, 0.8.3, 0.8.4, 0.8.5 (+17)

References

http://github.com/ensc/irssi-proxy/commit/85bbc05b21678e80423815d2ef1dfe26208491ab
http://irssi.org/news
http://irssi.org/news/ChangeLog
http://lists.fedoraproject.org/pipermail/package-announce/2010-May/041054.html
http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00001.html
http://marc.info/?l=oss-security&m=127098845125270&w=2
http://marc.info/?l=oss-security&m=127110132019166&w=2
http://marc.info/?l=oss-security&m=127116251220784&w=2
http://marc.info/?l=oss-security&m=127119240204394&w=2
http://secunia.com/advisories/39365
http://secunia.com/advisories/39620
http://secunia.com/advisories/39797

Get alerted when CVE-2010-1155 or the next vulnerability affects your stack