USN-3184-1: Irssi vulnerabilities
Ubuntu Security Notice USN-3184-1
1st February, 2017
irssi vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
Summary
Several security issues were fixed in Irssi.
Software description
- irssi - terminal based IRC client
Details
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)
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 16.10:
- irssi 0.8.19-1ubuntu2.1
- Ubuntu 16.04 LTS:
- irssi 0.8.19-1ubuntu1.3
- Ubuntu 14.04 LTS:
- irssi 0.8.15-5ubuntu3.1
- Ubuntu 12.04 LTS:
- irssi 0.8.15-4ubuntu3.1
To update your system, please follow these instructions: http://ift.tt/17VXqjU.
After a standard system update you need to restart Irssi to make all the
necessary changes.
References
CVE-2016-7553, CVE-2017-5193, CVE-2017-5194, CVE-2017-5195, CVE-2017-5196, CVE-2017-5356
from Ubuntu Security Notices http://ift.tt/2ksI7vw