CVE-2014-6052

Publication date 24 September 2014

Last updated 26 May 2025

Ubuntu priority

Medium

Why this priority?

Description

The HandleRFBServerMessage function in libvncclient/rfbproto.c in LibVNCServer 0.9.9 and earlier does not check certain malloc return values, which allows remote VNC servers to cause a denial of service (application crash) or possibly execute arbitrary code by specifying a large screen size in a (1) FramebufferUpdate, (2) ResizeFrameBuffer, or (3) PalmVNCReSizeFrameBuffer message.

Read the notes from the security team

Status

Package Ubuntu Release Status
italc 20.04 LTS focal Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial
Fixed in 1:2.0.2+dfsg1-4ubuntu0.1
14.04 LTS trusty Not in release
krfb 14.04 LTS trusty Not in release
12.04 LTS precise Not in release
10.04 LTS lucid Not in release
libvncserver 14.04 LTS trusty
Fixed in 0.9.9+dfsg-1ubuntu1.1
12.04 LTS precise
Fixed in 0.9.8.2-2ubuntu1.1
10.04 LTS lucid Ignored end of life

Notes

mdeslaur

same patches as CVE-2014-6051 krfb is only a server, this issue is client side.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libvncserver

References

Related Ubuntu Security Notices (USN)

    • USN-2365-1
    • LibVNCServer vulnerabilities
    • 29 September 2014
    • USN-4587-1
    • iTALC vulnerabilities
    • 20 October 2020

Other references

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