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USN-3546-1: gcab vulnerability

24 January 2018

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

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Releases

Packages

gcab - Microsoft Cabinet file manipulation tool

Details

Richard Hughes discovered that gcab incorrectly handled certain malformed
cabinet files. If a user or automated system were tricked into opening a
specially crafted cabinet file, a remote attacker could use this issue to
cause gcab 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 17.10

gcab - 0.7-4ubuntu0.1
libgcab-1.0-0 - 0.7-4ubuntu0.1

Ubuntu 16.04

gcab - 0.7-1ubuntu0.1
libgcab-1.0-0 - 0.7-1ubuntu0.1

After a standard system update you need to restart your session to make
all the necessary changes.

References

CVE-2018-5345

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Further reading