The following updates has been released for Ubuntu Linux:

USN-4086-1: Mercurial vulnerability
USN-4087-1: BWA vulnerability

USN-4086-1: Mercurial vulnerability

==========================================================================
Ubuntu Security Notice USN-4086-1
August 06, 2019

Mercurial vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04

Summary:

Mercurial could be made to overwrite files.

Software Description:
- mercurial: easy-to-use, scalable distributed version control system

Details:

It was discovered that Mercurial mishandled symlinks in subrepositories. An
attacker could use this vulnerability to write arbitrary files to the
target's filesystem.

Update instructions:

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

Ubuntu 19.04:
mercurial 4.8.2-1ubuntu3.19.04.1
mercurial-common 4.8.2-1ubuntu3.19.04.1

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

References:
https://usn.ubuntu.com/4086-1
CVE-2019-3902

Package Information:
https://launchpad.net/ubuntu/+source/mercurial/4.8.2-1ubuntu3.19.04.1

USN-4087-1: BWA vulnerability

==========================================================================
Ubuntu Security Notice USN-4087-1
August 06, 2019

BWA vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04
- Ubuntu 18.04 LTS

Summary:

BWA could be made to crash or run programs as your login if it
opened a specially crafted file.

Software Description:
- bwa: Software package for mapping DNA sequences against a large reference genome

Details:

It was discovered that Burrows-Wheeler Aligner (BWA) mishandled certain
crafted .alt files. An attacker could use this vulnerability to cause a
denial of service (crash) or possibly execute arbitrary code.

Update instructions:

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

Ubuntu 19.04:
bwa 0.7.17-3~ubuntu0.19.04.1

Ubuntu 18.04 LTS:
bwa 0.7.17-1ubuntu0.1

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

References:
https://usn.ubuntu.com/4087-1
CVE-2019-10269

Package Information:
https://launchpad.net/ubuntu/+source/bwa/0.7.17-3~ubuntu0.19.04.1
https://launchpad.net/ubuntu/+source/bwa/0.7.17-1ubuntu0.1