Out-of-bounds read in Irssi - CVE-2017-5356
Published: March 3, 2017 / Updated: July 18, 2020
Vulnerability identifier: #VU31442
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-5356
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
Irssi before 0.8.21 allows remote attackers to cause a denial of service (out-of-bounds read and crash) via a string containing a formatting sequence (%[) without a closing bracket (]).
Affected software
Irssi
irssi (Alpine package)
irssi
Fedora
irssi (Alpine package)
irssi
Fedora
How to mitigate CVE-2017-5356
Install update from vendor's website.
Irssi - update to 0.8.21
irssi (Alpine package) - update to 0.8.21-r0
irssi - addressed in versions 0.8.21-1.el5, 0.8.21-1.fc24, 0.8.21-1.fc25
irssi (Alpine package) - update to 0.8.21-r0
irssi - addressed in versions 0.8.21-1.el5, 0.8.21-1.fc24, 0.8.21-1.fc25
External References
- http://www.openwall.com/lists/oss-security/2017/01/12/8
- http://www.openwall.com/lists/oss-security/2017/01/13/2
- http://www.securityfocus.com/bid/96581
- https://blog.fuzzing-project.org/55-Fuzzing-Irssi-with-Perl-Scripts.html
- https://irssi.org/security/irssi_sa_2017_01.txt
- https://lists.debian.org/debian-lts-announce/2017/12/msg00022.html