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📚 USN-3184-1: Irssi vulnerabilities


💡 Newskategorie: Unix Server
🔗 Quelle: ubuntu.com

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: https://wiki.ubuntu.com/Security/Upgrades.

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

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