What’s Vulnerable › Vulnerabilities

CVE-2017-5193

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-03-03 · updated 2026-06-17
• Weakness: CWE-476

Description

The nickcmp function in Irssi before 0.8.21 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a message without a nick.

Affected products

• Debian Linux: 7.0
• Irssi: before 0.8.21 — fixed in 0.8.21

How to fix

Upgrade to a fixed version: Irssi 0.8.21. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2017/01/06/1
• http://www.securityfocus.com/bid/95310
• https://irssi.org/security/irssi_sa_2017_01.txt
• https://lists.debian.org/debian-lts-announce/2017/12/msg00022.html
• https://security.gentoo.org/glsa/201701-45
• http://www.openwall.com/lists/oss-security/2017/01/06/1
• http://www.securityfocus.com/bid/95310
• https://irssi.org/security/irssi_sa_2017_01.txt
• https://lists.debian.org/debian-lts-announce/2017/12/msg00022.html
• https://security.gentoo.org/glsa/201701-45

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