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USN-3434-2: Libidn vulnerability

23 October 2017

Libidn could be made to crash or run programs if it processed specially crafted input.

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Releases

Packages

  • libidn - implementation of IETF IDN specifications

Details

USN-3434-1 fixed a vulnerability in Libidn. This update
provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

It was discovered that Libidn incorrectly handled decoding certain digits.
A remote attacker could use this issue to cause Libidn 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.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 12.04

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

References

Related notices

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Further reading