USN-4524-1: TNEF vulnerabilities

21 September 2020

TNEF could be made to crash or write arbitrary files to the filesystem.

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Releases

Packages

  • tnef - Tool to unpack MIME application/ms-tnef attachments

Details

Paul Dreik discovered that TNEF incorrectly handled filenames. If a user
were tricked into opening a specially crafted email attachment, an
attacker could possibly use this issue to write arbitrary files to the
filesystem or cause TNEF crash, resulting in a denial of service.
(CVE-2019-18849)

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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 16.04

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

References

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Further reading