Ubuntu Security Notice USN-3205-1
21st February, 2017
tcpdump 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
tcpdump could be made to crash or run programs if it received specially
crafted network traffic.
Software description
- tcpdump
– command-line network traffic analyzer
Details
It was discovered that tcpdump incorrectly handled certain packets. A
remote attacker could use this issue to cause tcpdump to crash, resulting
in a denial of service, or possibly execute arbitrary code.
In the default installation, attackers would be isolated by the tcpdump
AppArmor profile.
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 16.10:
-
tcpdump
4.9.0-1ubuntu1~ubuntu16.10.1
- Ubuntu 16.04 LTS:
-
tcpdump
4.9.0-1ubuntu1~ubuntu16.04.1
- Ubuntu 14.04 LTS:
-
tcpdump
4.9.0-1ubuntu1~ubuntu14.04.1
- Ubuntu 12.04 LTS:
-
tcpdump
4.9.0-1ubuntu1~ubuntu12.04.1
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.