CVE catalog

CVE-2011-1775

tigervnc: CVE-2011-1775

Severity: Low
Published: Jun 15, 2011, 10:05:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 1.29% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	tigervnc	sid	`1.16.2+dfsg-1`	not affected
Debian	tigervnc	forky	`1.16.2+dfsg-1`	not affected
Debian	tigervnc	trixie	`1.15.0+dfsg-2.1~deb13u1`	not affected
Debian	tigervnc	bookworm	`1.12.0+dfsg-8`	not affected

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	tigervnc	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	tigervnc	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	tigervnc	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	tigervnc	source	bookworm	`Not affected`	unimportant	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[tigervnc-common]Not affected
Source package: [tigervnc]
Details (2)
- 1.12.0+dfsg-8 · amd64 · bookworm
  Not affected
  dsa · tigervnc · debian · bookworm
- 1.12.0+dfsg-8 · arm64 · bookworm
  Not affected
  dsa · tigervnc · debian · bookworm
[tigervnc-scraping-server]Not affected
Source package: [tigervnc]
Details (2)
- 1.12.0+dfsg-8 · amd64 · bookworm
  Not affected
  dsa · tigervnc · debian · bookworm
- 1.12.0+dfsg-8 · arm64 · bookworm
  Not affected
  dsa · tigervnc · debian · bookworm
[tigervnc-standalone-server]Not affected
Source package: [tigervnc]
Details (2)
- 1.12.0+dfsg-8 · amd64 · bookworm
  Not affected
  dsa · tigervnc · debian · bookworm
- 1.12.0+dfsg-8 · arm64 · bookworm
  Not affected
  dsa · tigervnc · debian · bookworm
[tigervnc-tools]Not affected
Source package: [tigervnc]
Details (2)
- 1.12.0+dfsg-8 · amd64 · bookworm
  Not affected
  dsa · tigervnc · debian · bookworm
- 1.12.0+dfsg-8 · arm64 · bookworm
  Not affected
  dsa · tigervnc · debian · bookworm
[tigervnc-viewer]Not affected
Source package: [tigervnc]
Details (2)
- 1.12.0+dfsg-8 · amd64 · bookworm
  Not affected
  dsa · tigervnc · debian · bookworm
- 1.12.0+dfsg-8 · arm64 · bookworm
  Not affected
  dsa · tigervnc · debian · bookworm
[tigervnc-xorg-extension]Not affected
Source package: [tigervnc]
Details (2)
- 1.12.0+dfsg-8 · amd64 · bookworm
  Not affected
  dsa · tigervnc · debian · bookworm
- 1.12.0+dfsg-8 · arm64 · bookworm
  Not affected
  dsa · tigervnc · debian · bookworm

Observed: Oct 23, 2026, 5:05:24 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [Red Hat security advisories and VEX]