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Ubuntu 16.04 LTS Advisory USN-4547-2 Critical: ssvnc Memory Issues

ubuntu
Calendar Grey September 28, 2020
Dist Ubuntu Esm H88
Multiple vulnerabilities in ssvnc addressed in Ubuntu 16.04 LTS. Make sure your machines are current to safeguard against potential threats.
Several security issues were fixed in SSVNC.

Summary

Several security issues were fixed in SSVNC.

Software Description:

- ssvnc: Enhanced TightVNC viewer with SSL/SSH tunnel helper

Details:

It was discovered that the LibVNCClient vendored in SSVNC incorrectly handled

certain packet lengths. A remote attacker could possibly use this issue to

obtain sensitive information, cause a denial of service, or execute arbitrary

code. (CVE-2018-20020, CVE-2018-20021, CVE-2018-20022, CVE-2018-2024)

Topics%20covered

Topics Covered

security advisory denial of service memory corruption Ubuntu ssvnc

Update Instructions

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

Ubuntu 16.04 LTS:
  ssvnc                           1.0.29-2+deb8u1build0.16.04.1

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

References

https://ubuntu.com/security/notices/USN-4547-2

https://ubuntu.com/security/notices/USN-4547-1

CVE-2018-20020, CVE-2018-20021, CVE-2018-20022, CVE-2018-20024

Severity
critical
Lowest
Low
Medium
High
Critical

September 28, 2020

Topics%20covered

Topics Covered

security advisory denial of service memory corruption Ubuntu ssvnc

Package Information

https://launchpad.net/ubuntu/+source/ssvnc/1.0.29-2+deb8u1build0.16.04.1
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