CVE-2011-1775

Description

The CSecurityTLS::processMsg function in common/rfb/CSecurityTLS.cxx in the vncviewer component in TigerVNC 1.1beta1 does not properly verify the server's X.509 certificate, which allows man-in-the-middle attackers to spoof a TLS VNC server via an arbitrary certificate.

Category

5.8
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.56%
Vendor Advisory fedoraproject.org Vendor Advisory redhat.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://openwall.com/lists/oss-security/2011/05/06/2 mailing list
http://openwall.com/lists/oss-security/2011/05/09/7 mailing list
http://www.mail-archive.com/tigervnc-devel%40lists.sourceforge.net/msg01342.html mailing list
http://www.mail-archive.com/tigervnc-devel%40lists.sourceforge.net/msg01345.html mailing list
https://bugzilla.redhat.com/show_bug.cgi?id=702672
http://lists.fedoraproject.org/pipermail/package-announce/2011-May/060567.html vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=702470
http://www.redhat.com/support/errata/RHSA-2011-0871.html vendor advisory
http://secunia.com/advisories/44939 third party advisory
http://www.securityfocus.com/bid/47738 vdb entry
http://www.mail-archive.com/tigervnc-devel%40lists.sourceforge.net/msg01347.html mailing list

Frequently Asked Questions

What is the severity of CVE-2011-1775?
CVE-2011-1775 has been scored as a medium severity vulnerability.
How to fix CVE-2011-1775?
To fix CVE-2011-1775, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-1775 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2011-1775 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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