USN-3758-1: libx11 vulnerabilities

Releases

• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• libx11 - X11 client-side library

Details

Tobias Stoeckmann discovered that libx11 incorrectly handled certain images.
An attacker could possibly use this issue to access sensitive information
(CVE-2016-7942)

Tobias Stoeckmann discovered that libx11 incorrectly handled certain inputs.
An attacker could possibly use this issue to access sensitive information.
(CVE-2016-7943)

It was discovered that libx11 incorrectly handled certain inputs.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2018-14598, CVE-2018-14599, CVE-2018-14600)

Update instructions

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

Ubuntu 18.04

• libx11-6 - 2:1.6.4-3ubuntu0.1
• libx11-dev - 2:1.6.4-3ubuntu0.1

Ubuntu 16.04

• libx11-6 - 2:1.6.3-1ubuntu2.1
• libx11-dev - 2:1.6.3-1ubuntu2.1

Ubuntu 14.04

• libx11-6 - 2:1.6.2-1ubuntu2.1
• libx11-dev - 2:1.6.2-1ubuntu2.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

• CVE-2016-7942
• CVE-2016-7943
• CVE-2018-14598
• CVE-2018-14599
• CVE-2018-14600

Related notices

• USN-3758-2: libx11-6, libx11, libx11-dev