CVE-2017-5193
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.59%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 5.59% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- irssi/irssi · debian/debian linux
- Source
- cve@mitre.org
EPSS 5.6% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.openwall.com/lists/oss-security/2017/01/06/1Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/95310Third Party Advisory, VDB Entry
- https://irssi.org/security/irssi_sa_2017_01.txtPatch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2017/12/msg00022.htmlThird Party Advisory
- https://security.gentoo.org/glsa/201701-45Third Party Advisory
- http://www.openwall.com/lists/oss-security/2017/01/06/1Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/95310Third Party Advisory, VDB Entry
- https://irssi.org/security/irssi_sa_2017_01.txtPatch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2017/12/msg00022.htmlThird Party Advisory
- https://security.gentoo.org/glsa/201701-45Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.