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CVE-2016-9941

Publication date 31 December 2016

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

Heap-based buffer overflow in rfbproto.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message containing a subrectangle outside of the client drawing area.

Status

Package Ubuntu Release Status
italc 20.04 LTS focal Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial
Fixed 1:2.0.2+dfsg1-4ubuntu0.1
14.04 LTS trusty Not in release
libvncserver 16.10 yakkety
Fixed 0.9.10+dfsg-3ubuntu0.16.10.1
16.04 LTS xenial
Fixed 0.9.10+dfsg-3ubuntu0.16.04.1
14.04 LTS trusty
Fixed 0.9.9+dfsg-1ubuntu1.2
12.04 LTS precise
Fixed 0.9.8.2-2ubuntu1.2

Patch details

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

Package Patch details
libvncserver

Severity score breakdown

Parameter Value
Base score 9.8 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-3171-1
    • LibVNCServer vulnerabilities
    • 11 January 2017
    • USN-4587-1
    • iTALC vulnerabilities
    • 20 October 2020

Other references