CVE-2010-1155
Irssi before 0.8.15, when SSL is used, does not verify that the server hostname matches a domain...
CVE-2010-1155 is a medium vulnerability (CVSS 6.8) in Irssi, published April 16, 2010. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.56%, the 75th percentile. Fixed in irssi 0.8.15-1.
- Severity
- 6.8 MediumCVSS 2.0, NVD
- Exploit chance
- 1.56%EPSS, 75th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
0.8.15-1irssi +3 more
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.
Exploit likelihood
Affected products
Affected packages
What each source reports
NVD Score used
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.
- Record
CVE-2010-1155- CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-20
- Updated
- 2026-11-02
CVE ListNo score
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.
- Record
CVE-2010-1155- Updated
- 2026-11-02
EUVDEUVD-2010-1186No score
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.
- Record
EUVD-2010-1186- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hvgv-8rp6-894gNo score
Irssi before 0.8.15, when SSL is used, does not verify that the server hostname matches a domain...
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.
- Record
GHSA-hvgv-8rp6-894g- Weakness
- CWE-20
- Updated
- 2026-11-02
OSVNo score
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.
- Record
CVE-2010-1155- Updated
- 2026-11-02
OSVDEBIAN-CVE-2010-1155No score
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.
- Record
DEBIAN-CVE-2010-1155- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10455-1No score
irssi-0.8.20-3.1 on GA media
These are all security issues fixed in the irssi-0.8.20-3.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10455-1- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
marc.info?l=oss-security&m=127110132019166&w=2
vupen.com/english/advisories/2010/0856
exchange.xforce.ibmcloud.com/vulnerabilities/57790
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lists.opensuse.org/opensuse-security-announce/2010-05/msg00001.html
secunia.com/advisories/39620
ubuntu.com/usn/USN-929-1
irssi.org/news
slackware.com/security/viewer.php?l=slackware-security&y=2010&m=slackware-security.497301
lists.fedoraproject.org/pipermail/package-announce/2010-May/041054.html
github.com/ensc/irssi-proxy/commit/85bbc05b21678e80423815d2ef1dfe26208491ab
nvd.nist.gov/vuln/detail/CVE-2010-1155
security-tracker.debian.org/tracker/CVE-2010-1155
suse.com/security/cve/CVE-2009-1959