USN-5102-2: Mercurial vulnerabilities

Releases

• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

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)

Update instructions

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

Ubuntu 16.04

• mercurial - 3.7.3-1ubuntu1.2+esm2
  Available with Ubuntu Pro
• mercurial-common - 3.7.3-1ubuntu1.2+esm2
  Available with Ubuntu Pro

Ubuntu 14.04

• mercurial - 2.8.2-1ubuntu1.4+esm1
  Available with Ubuntu Pro
• mercurial-common - 2.8.2-1ubuntu1.4+esm1
  Available with Ubuntu Pro

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

References

• CVE-2019-3902
• CVE-2018-17983

Related notices

• USN-4086-1: mercurial-common, mercurial
• USN-5102-1: mercurial-common, mercurial