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USN-6166-2: libcap2 vulnerability

19 June 2023

libcap could be made to crash or possibly execute arbitrary code if it received a specially crafted input.

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Releases

Packages

  • libcap2 - POSIX 1003.1e capabilities (library)

Details

USN-6166-1 fixed a vulnerability in libcap2. This update provides
the corresponding update for Ubuntu 14.04 ESM, Ubuntu 16.04 ESM
and Ubuntu 18.04 ESM.

Original advisory details:

Richard Weinberger discovered that libcap2 incorrectly handled certain long
input strings. An attacker could use this issue to cause libcap2 to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2023-2603)

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 18.04
Ubuntu 16.04
Ubuntu 14.04

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

References

Related notices

  • USN-6166-1: libcap2, libpam-cap, libcap2-bin, libcap-dev

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Further reading