USN-5053-1: libssh vulnerability

26 August 2021

libssh could be made to crash or run programs if it received specially crafted network traffic.

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Releases

Packages

  • libssh - A tiny C SSH library

Details

It was discovered that libssh incorrectly handled rekeying. A remote
attacker could use this issue to cause libssh to crash, resulting in a
denial of service, or possibly execute arbitrary code.

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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 21.04
Ubuntu 20.04

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

References

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Further reading