Several security issues were fixed in Irssi.
It was discovered that the Irssi buf.pl script set incorrect permissions. A local attacker could use this issue to retrieve another user’s window contents. (CVE-2016-7553)
1 February 2017
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in Irssi.
It was discovered that the Irssi buf.pl script set incorrect permissions. A local attacker could use this issue to retrieve another user’s window contents. (CVE-2016-7553)
Joseph Bisch discovered that Irssi incorrectly handled comparing nicks. A remote attacker could use this issue to cause Irssi to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-5193)
It was discovered that Irssi incorrectly handled invalid nick messages. A remote attacker could use this issue to cause Irssi to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-5194)
Joseph Bisch discovered that Irssi incorrectly handled certain incomplete control codes. A remote attacker could use this issue to cause Irssi to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2017-5195)
Hanno Böck and Joseph Bisch discovered that Irssi incorrectly handled certain incomplete character sequences. A remote attacker could use this issue to cause Irssi to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2017-5196)
Hanno Böck discovered that Irssi incorrectly handled certain format strings. A remote attacker could use this issue to cause Irssi to crash, resulting in a denial of service. (CVE-2017-5356)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart Irssi to make all the necessary changes.
Vulmon