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USN-4221-1: libpcap vulnerability

11 December 2019

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



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


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 19.04
Ubuntu 18.04
Ubuntu 16.04
Ubuntu 14.04

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


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