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USN-5907-1: c-ares vulnerability

2 March 2023

c-ares could be made to crash or run programs if it processed specially crafted input.

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Releases

Packages

  • c-ares - library for asynchronous name resolution

Details

It was discovered that c-ares incorrectly handled certain sortlist strings.
A remote attacker could use this issue to cause c-ares to crash, resulting
in a denial of service, or possibly execute arbitrary code.

Reduce your security exposure

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.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 22.10
Ubuntu 22.04
Ubuntu 20.04
Ubuntu 18.04

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

References

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Further reading