1. Ubuntu Security Notices
  2. USN-4221-1

USN-4221-1: libpcap vulnerability

Publication date

11 December 2019

Overview

Applications using libpcap could be made to crash if given specially crafted data.

Releases

Packages

  • libpcap - Library for for user-level network packet capture

Details

It was discovered that libpcap did not properly validate PHB headers in
some situations. An attacker could use this to cause a denial of service
(memory exhaustion).

It was discovered that libpcap did not properly validate PHB headers in
some situations. An attacker could use this to cause a denial of service
(memory exhaustion).

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
19.04 disco libpcap0.8 –  1.8.1-6ubuntu1.19.04.1
18.04 bionic libpcap0.8 –  1.8.1-6ubuntu1.18.04.1
16.04 xenial libpcap0.8 –  1.7.4-2ubuntu0.1
14.04 trusty libpcap0.8 –  1.5.3-2ubuntu0.1  

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References

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