USN-4221-2: libpcap vulnerability

15 January 2020

libpcap vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 12.04 ESM


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

Software Description

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


USN-4221-1 fixed a vulnerability in libpcap. This update provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory 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).

Update instructions

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

Ubuntu 12.04 ESM
libpcap0.8 - 1.1.1-10ubuntu0.1

To update your system, please follow these instructions:

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