CVE-2011-1775

Home/CVE/The CSecurityTLS::processMsg function in common/rfb/CSecurityTLS.cxx in the vncviewer component in TigerVNC 1.1beta1 doe

CVE

The CSecurityTLS::processMsg function in common/rfb/CSecurityTLS.cxx in the vncviewer component in TigerVNC 1.1beta1 doe

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.

MEDIUM · CVSS 5.8 EPSS 0.00561

Monitor

No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence

Sigma rules0 YARA rules0

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Weakness Classification

CWE-20Improper Input Validation

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Affected Products & Versions

tigervncall versions

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Scoring & Timeline

5.8

MEDIUM · CVSS v2 (legacy) · secalert@redhat.com

View on NVD

This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.

v2 Vector

AV:N/AC:M/Au:N/C:P/I:P/A:N

Published to NVD26 May 2011 · 06:55 PM

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Vendor Advisories

rhsaRHSA-2011:0871Moderate

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References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

http://lists.fedoraproject.org/pipermail/package-announce/2011-May/060567.html

http://openwall.com/lists/oss-security/2011/05/06/2

http://openwall.com/lists/oss-security/2011/05/09/7

http://secunia.com/advisories/44939

http://www.mail-archive.com/tigervnc-devel%40lists.sourceforge.net/msg01342.html

http://www.mail-archive.com/tigervnc-devel%40lists.sourceforge.net/msg01345.html

Show all 11 references

http://www.mail-archive.com/tigervnc-devel%40lists.sourceforge.net/msg01347.html

http://www.redhat.com/support/errata/RHSA-2011-0871.html

http://www.securityfocus.com/bid/47738

https://bugzilla.redhat.com/show_bug.cgi?id=702470

https://bugzilla.redhat.com/show_bug.cgi?id=702672

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