NULL pointer dereference in Irssi - CVE-2018-5206

Vulnerability identifier: #VU11473

CSH Severity: Low

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2018-5206

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to NULL pointer dereference when the channel topic is set without specifying a sender. A remote attacker can cause the service to crash.

Irssi
Arch Linux
Debian Linux
Slackware Linux
Ubuntu
Fedora
irssi (Alpine package)
irssi

Update to version 1.0.6.

irssi (Alpine package) - update to 1.0.6-r0
irssi - addressed in versions 1.0.6-1.fc26, 1.0.6-1.fc27

• https://irssi.org/security/irssi_sa_2018_01.txt

• Ubuntu update for Irssi
• Arch Linux update for irssi
• Debian update for irssi
• Slackware Linux update for irssi
• NULL pointer dereference in irssi (Alpine package)
• Fedora 27 update for irssi
• Fedora 26 update for irssi