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Alerts This Week
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Ubuntu 20.04 ESM USN-5965-1: TigerVNC Info Exposure Risk

ubuntu
Calendar Grey March 21, 2023
Scroller Ubuntu
A critical flaw in TigerVNC on Ubuntu 20.04 may leak sensitive data, necessitating prompt updates to resolve the security concern.
TigerVNC could be made to expose sensitive information over the network.

Summary

TigerVNC could be made to expose sensitive information over the network.

Software Description:

- tigervnc: High-performance, platform-neutral implementation of VNC

Details:

It was discovered that TigerVNC mishandled TLS certificate exceptions. An

attacker could use this vulnerability to impersonate any server after a client

had added an exception and obtain sensitive information.

Topics%20covered

Topics Covered

security advisory Ubuntu update instructions information exposure TigerVNC

Update Instructions

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

Ubuntu 20.04 ESM:
  tigervnc-common                 1.10.1+dfsg-3ubuntu0.1+esm2
  tigervnc-scraping-server        1.10.1+dfsg-3ubuntu0.1+esm2
  tigervnc-standalone-server      1.10.1+dfsg-3ubuntu0.1+esm2

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

References

https://ubuntu.com/security/notices/USN-5965-1

CVE-2020-26117

Severity
important
Lowest
Low
Medium
High
Critical

March 21, 2023

Topics%20covered

Topics Covered

security advisory Ubuntu update instructions information exposure TigerVNC

Package Information

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