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.
02 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.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 5.59% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 92.5% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2017-03-03 15:00Z9 YR AGO
- Last updated
- 2024-08-05 14:55Z2 YR AGO
- Reserved
- 2017-01-06
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-476NULL Pointer DereferenceBase
- Data version
- 5.1
- Document digest
- eb53c3fb7283791a86ae26d89fb1a9fbe0d936df72252635c5ee921f063a4b63
05 Affected products
06 References
- www.openwall.com[oss-security] 20170106 Re: CVE Request: Irssi Multiple Vulnerabilities (2017/01)http://www.openwall.com/lists/oss-security/2017/01/06/1
- lists.debian.org[debian-lts-announce] 20171223 [SECURITY] [DLA 1217-1] irssi security updatehttps://lists.debian.org/debian-lts-announce/2017/12/msg00022.html
- irssi.orghttps://irssi.org/security/irssi_sa_2017_01.txt
- www.securityfocus.com95310http://www.securityfocus.com/bid/95310
- security.gentoo.orgGLSA-201701-45https://security.gentoo.org/glsa/201701-45
07 Fixed in
Arch Linux
- irssi Fixed in 0.8.21-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
Debian 12
- irssi Fixed in 0.8.21-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- irssi Fixed in 0.8.21-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- irssi Fixed in 0.8.21-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- irssi Fixed in 0.8.15-5ubuntu3.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- irssi Fixed in 0.8.19-1ubuntu1.3
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.