Use-after-free in Irssi - CVE-2017-15227
Published: October 22, 2017 / Updated: July 28, 2020
Vulnerability identifier: #VU32046
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-2017-15227
CWE-ID: CWE-416
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 1.0.5, while waiting for the channel synchronisation, may incorrectly fail to remove destroyed channels from the query list, resulting in use-after-free conditions when updating the state later on.
Affected software
Irssi
Arch Linux
Slackware Linux
irssi (Alpine package)
Arch Linux
Slackware Linux
irssi (Alpine package)
How to mitigate CVE-2017-15227
Install update from vendor's website.
Irssi - update to 1.0.5
irssi (Alpine package) - addressed in versions 1.0.5-r0, 1.0.6-r0
irssi (Alpine package) - addressed in versions 1.0.5-r0, 1.0.6-r0