- Vulnerability/
- USN-3171-1
USN-3171-1: LibVNCServer vulnerabilities
First published: Wed Jan 11 2017(Updated: )
Josef Gajdusek discovered that the LibVNCServer client library incorrectly handled certain FrameBufferUpdate messages. If a user were tricked into connecting to a malicious server, an attacker could use this issue to cause a denial of service, or possibly execute arbitrary code. (CVE-2016-9941, CVE-2016-9942)
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| ubuntu/libvncclient1 | <0.9.10+dfsg-3ubuntu0.16.10.1 | 0.9.10+dfsg-3ubuntu0.16.10.1 |
| Ubuntu Ubuntu | =16.10 | |
| All of | ||
| ubuntu/libvncserver1 | <0.9.10+dfsg-3ubuntu0.16.10.1 | 0.9.10+dfsg-3ubuntu0.16.10.1 |
| Ubuntu Ubuntu | =16.10 | |
| All of | ||
| ubuntu/libvncclient1 | <0.9.10+dfsg-3ubuntu0.16.04.1 | 0.9.10+dfsg-3ubuntu0.16.04.1 |
| Ubuntu Ubuntu | =16.04 | |
| All of | ||
| ubuntu/libvncserver1 | <0.9.10+dfsg-3ubuntu0.16.04.1 | 0.9.10+dfsg-3ubuntu0.16.04.1 |
| Ubuntu Ubuntu | =16.04 | |
| All of | ||
| ubuntu/libvncserver0 | <0.9.9+dfsg-1ubuntu1.2 | 0.9.9+dfsg-1ubuntu1.2 |
| Ubuntu Ubuntu | =14.04 | |
| All of | ||
| ubuntu/libvncserver0 | <0.9.8.2-2ubuntu1.2 | 0.9.8.2-2ubuntu1.2 |
| Ubuntu Ubuntu | =12.04 |
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Reference Links
- https://ubuntu.com/security/CVE-2016-9941
- https://ubuntu.com/security/CVE-2016-9942
- https://ubuntu.com/security/notices/USN-4587-1
- https://launchpad.net/ubuntu/+source/libvncserver/0.9.10+dfsg-3ubuntu0.16.10.1
- https://launchpad.net/ubuntu/+source/libvncserver/0.9.10+dfsg-3ubuntu0.16.04.1
- https://launchpad.net/ubuntu/+source/libvncserver/0.9.9+dfsg-1ubuntu1.2
- https://launchpad.net/ubuntu/+source/libvncserver/0.9.8.2-2ubuntu1.2
- https://ubuntu.com/security/notices/USN-3171-1 (Advisory)
Frequently Asked Questions
What is the vulnerability ID for this advisory?
The vulnerability ID for this advisory is CVE-2016-9941.
What is the severity of CVE-2016-9941?
The severity of CVE-2016-9941 is not provided in the advisory.
How does the vulnerability CVE-2016-9941 affect LibVNCServer?
The vulnerability CVE-2016-9941 affects the LibVNCServer client library.
How can an attacker exploit CVE-2016-9941?
An attacker can exploit CVE-2016-9941 by tricking a user into connecting to a malicious server.
Is there a fix available for CVE-2016-9941?
Yes, a fix is available for CVE-2016-9941. Users should update to version 0.9.10+dfsg-3ubuntu0.16.10.1 of libvncclient1 and libvncserver1.
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