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AUSCERT External Security Bulletin Redistribution
ESB-2018.2582
libx11 vulnerabilities
31 August 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: libx11
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Access Privileged Data -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2018-14600 CVE-2018-14599 CVE-2018-14598
CVE-2016-7943 CVE-2016-7942
Reference: ASB-2017.0219
ESB-2018.2562
Original Bulletin:
http://www.ubuntu.com/usn/usn-3758-1
http://www.ubuntu.com/usn/usn-3758-2
Comment: This bulletin contains two (2) Ubuntu security advisories.
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USN-3758-1: libx11 vulnerabilities
30 August 2018
libx11 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
o Ubuntu 14.04 LTS
Summary
Several security issues were fixed in libx11.
Software Description
o 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 LTS
libx11-6 - 2:1.6.4-3ubuntu0.1
libx11-dev - 2:1.6.4-3ubuntu0.1
Ubuntu 16.04 LTS
libx11-6 - 2:1.6.3-1ubuntu2.1
libx11-dev - 2:1.6.3-1ubuntu2.1
Ubuntu 14.04 LTS
libx11-6 - 2:1.6.2-1ubuntu2.1
libx11-dev - 2:1.6.2-1ubuntu2.1
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades
After a standard system update you need to reboot your computer to make all the
necessary changes.
References
o CVE-2016-7942
o CVE-2016-7943
o CVE-2018-14598
o CVE-2018-14599
o CVE-2018-14600
- -------------------------------------------------------------------------------
USN-3758-2: libx11 vulnerabilities
30 August 2018
libx11 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 12.04 ESM
Summary
Several security issues were fixed in libx11.
Software Description
o libx11 - X11 client-side library
Details
USN-3758-1 fixed several vulnerabilities in libx11. This update provides the
corresponding update for Ubuntu 12.04 ESM.
Original advisory 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 12.04 ESM
libx11-6 - 2:1.4.99.1-0ubuntu2.4
libx11-dev - 2:1.4.99.1-0ubuntu2.4
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades
After a standard system update you need to reboot your computer to make all the
necessary changes.
References
o USN-3758-1
o CVE-2016-7942
o CVE-2016-7943
o CVE-2018-14598
o CVE-2018-14599
o CVE-2018-14600
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