USN-5102-2: Mercurial vulnerabilities

16 March 2021

Mercurial could be made to overwrite files.

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Releases

Packages

  • mercurial - easy-to-use, scalable distributed version control system

Details

USN-5102-1 fixed vulnerabilities in Mercurial. This update provides the
corresponding updates for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

It was discovered that Mercurial mishandled symlinks in subrepositories. An
attacker could use this issue to write arbitrary files to the
target’s filesystem. (CVE-2019-3902)

It was discovered that Mercurial incorrectly handled certain manifest files.
An attacker could use this issue to cause a denial of service and possibly
execute arbitrary code. This issue only affected Ubuntu 16.04 ESM. (CVE-2018-17983)

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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
Ubuntu 14.04

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

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