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USN-4968-1: LZ4 vulnerability

26 May 2021

LZ4 could be made to crash or run programs if it opened a specially crafted file.

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Releases

Packages

  • lz4 - Extremely fast compression algorithm

Details

It was discovered that LZ4 incorrectly handled certain memory operations.
If a user or automated system were tricked into uncompressing a specially-
crafted LZ4 file, a remote attacker could use this issue to cause LZ4 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 21.04
Ubuntu 20.10
Ubuntu 20.04
Ubuntu 18.04

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

References

Related notices

  • USN-4968-2: liblz4-dev, liblz4-1, lz4, liblz4-tool

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Further reading