USN-3877-1: LibVNCServer vulnerabilities

Releases

• Ubuntu 18.10
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• libvncserver - vnc server library

Details

It was discovered that LibVNCServer incorrectly handled certain operations.
A remote attacker able to connect to applications using LibVNCServer could
possibly use this issue to obtain sensitive information, cause a denial of
service, or execute arbitrary code.

Update instructions

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

Ubuntu 18.10

• libvncclient1 - 0.9.11+dfsg-1.1ubuntu0.1
• libvncserver1 - 0.9.11+dfsg-1.1ubuntu0.1

Ubuntu 18.04

• libvncclient1 - 0.9.11+dfsg-1ubuntu1.1
• libvncserver1 - 0.9.11+dfsg-1ubuntu1.1

Ubuntu 16.04

• libvncclient1 - 0.9.10+dfsg-3ubuntu0.16.04.3
• libvncserver1 - 0.9.10+dfsg-3ubuntu0.16.04.3

Ubuntu 14.04

• libvncserver0 - 0.9.9+dfsg-1ubuntu1.4

After a standard system update you need to restart LibVNCServer
applications to make all the necessary changes.

References

• CVE-2018-15126
• CVE-2018-15127
• CVE-2018-20019
• CVE-2018-20020
• CVE-2018-20021
• CVE-2018-20022
• CVE-2018-20023
• CVE-2018-20024
• CVE-2018-20748
• CVE-2018-20749
• CVE-2018-20750
• CVE-2018-6307

Related notices

• USN-4547-1: italc-master, libitalccore, italc-client, italc
• USN-4587-1: libitalccore, italc-master, italc-client, italc-management-console, italc
• USN-4547-2: ssvnc