CVE-2011-1775

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Summary

CVECVE-2011-1775
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2011-05-26 18:55:02 UTC
Updated2026-04-29 01:13:23 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v2.0 5.8 from [email protected]

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

Problem Types: CWE-20 | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Tigervnc Tigervnc 1.1 beta1 All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
TigerVNC SSL Certificate Validation Security Bypass Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
Bug 702470 – CVE-2011-1775 tigervnc: vncviewer can send password to server without proper validation of the X.509 certificate af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com
Bug 702672 – tigervnc: vncviewer can send password to server without proper validation of the X.509 certificate [fedora-15] af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com
Re: [Tigervnc-devel] potential vulnerability in TLS secType? af854a3a-2127-422b-91ae-364da2661108 www.mail-archive.com
[Tigervnc-devel] potential vulnerability in TLS secType? af854a3a-2127-422b-91ae-364da2661108 www.mail-archive.com
[SECURITY] Fedora 15 Update: tigervnc-1.0.90-4.fc15 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
Support af854a3a-2127-422b-91ae-364da2661108 www.redhat.com
oss-security - Re: CVE request: tigervnc af854a3a-2127-422b-91ae-364da2661108 openwall.com
Red Hat update for tigervnc - Secunia.com af854a3a-2127-422b-91ae-364da2661108 secunia.com
oss-security - CVE request: tigervnc af854a3a-2127-422b-91ae-364da2661108 openwall.com
Re: [Tigervnc-devel] potential vulnerability in TLS secType? af854a3a-2127-422b-91ae-364da2661108 www.mail-archive.com
[Tigervnc-devel] potential vulnerability in TLS secType? MITRE www.mail-archive.com
Re: [Tigervnc-devel] potential vulnerability in TLS secType? MITRE www.mail-archive.com
Re: [Tigervnc-devel] potential vulnerability in TLS secType? MITRE www.mail-archive.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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