CVE-2011-1775: Input Validation
First published: Thu May 05 2011(Updated: )
It was reported [1] that vncviewer could prompt for, and send, authentication credentials to a remote server without first properly validating the X.509 certificate. This could allow a malicious server to obtain a client's credentials because the client does not indicate to the user that a certificate is bad or missing. A proposed patch [2] is being discussed. [1] <a href="http://www.mail-archive.com/tigervnc-devel@lists.sourceforge.net/msg01342.html">http://www.mail-archive.com/tigervnc-devel@lists.sourceforge.net/msg01342.html</a> [2] <a href="http://www.mail-archive.com/tigervnc-devel@lists.sourceforge.net/msg01347.html">http://www.mail-archive.com/tigervnc-devel@lists.sourceforge.net/msg01347.html</a>
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| TigerVNC | =1.1-beta1 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=702470
- https://bugzilla.redhat.com/show_bug.cgi?id=702672
- http://openwall.com/lists/oss-security/2011/05/09/7
- http://lists.fedoraproject.org/pipermail/package-announce/2011-May/060567.html
- http://openwall.com/lists/oss-security/2011/05/06/2
- http://www.securityfocus.com/bid/47738
- http://secunia.com/advisories/44939
- http://www.redhat.com/support/errata/RHSA-2011-0871.html
- http://www.mail-archive.com/tigervnc-devel%40lists.sourceforge.net/msg01342.html
- http://www.mail-archive.com/tigervnc-devel%40lists.sourceforge.net/msg01345.html
- http://www.mail-archive.com/tigervnc-devel%40lists.sourceforge.net/msg01347.html
- http://www.mail-archive.com/tigervnc-devel@lists.sourceforge.net/msg01342.html
- http://www.mail-archive.com/tigervnc-devel@lists.sourceforge.net/msg01347.html
- http://tigervnc.svn.sourceforge.net/viewvc/tigervnc?view=revision&revision=4200
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=702672
- https://access.redhat.com/security/cve/CVE-2011-1775
- https://rhn.redhat.com/errata/RHSA-2011-0871.html
Frequently Asked Questions
What is the severity of CVE-2011-1775?
CVE-2011-1775 is categorized as a moderate severity vulnerability due to potential credential exposure.
How do I fix CVE-2011-1775?
To mitigate CVE-2011-1775, users should upgrade to a version of TigerVNC that addresses the certificate validation issue.
What does CVE-2011-1775 affect?
CVE-2011-1775 specifically affects TigerVNC version 1.1-beta1 due to improper certificate validation.
What is the main risk associated with CVE-2011-1775?
The main risk of CVE-2011-1775 is that a malicious server could obtain legitimate client authentication credentials.
Is CVE-2011-1775 still a risk today?
While CVE-2011-1775 may be less prevalent due to older software being outdated, it still poses a risk for legacy systems using vulnerable versions.
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