tigervnc: vncviewer can send password to server without proper validation of the X.509 certificate
Published May 26, 2011
5.8
MEDIUMCVSS 2.0
EPSS 1.29%
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.
Affected products
No data.
No data.
Red Hat Enterprise Linux 6
tigervnc-0:1.0.90-0.15.20110314svn4359.el6_1.1
Fixed · RHSA-2011:0871
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | tigervnc-0:1.0.90-0.15.20110314svn4359.el6_1.1 | Fixed | RHSA-2011:0871 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:P/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.29% (0.01290) | 69.18th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.29% (0.01290) | 66.37th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.56% (0.00561) | 66.34th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.28% (0.00281) | 69.30th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.28% (0.00281) | 67.54th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.28% (0.00281) | 63.46th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.54% (0.01537) | 74.00th | v2 (v2022.01.01) |
| Feb 3, 2023 | 2.69% (0.02686) | 82.44th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.54% (0.01537) | 51.33th | v2 (v2022.01.01) |
References (14)
- http://lists.fedoraproject.org/pipermail/package-announce/2011-May/060567.html vendor-advisoryx_refsource_FEDORA
- http://openwall.com/lists/oss-security/2011/05/06/2 mailing-listx_refsource_MLIST
- http://openwall.com/lists/oss-security/2011/05/09/7 mailing-listx_refsource_MLIST
- http://secunia.com/advisories/44939 third-party-advisoryx_refsource_SECUNIA
- http://www.mail-archive.com/tigervnc-devel%40lists.sourceforge.net/msg01342.html mailing-listx_refsource_MLIST
- http://www.mail-archive.com/tigervnc-devel%40lists.sourceforge.net/msg01345.html mailing-listx_refsource_MLIST
- http://www.mail-archive.com/tigervnc-devel%40lists.sourceforge.net/msg01347.html mailing-listx_refsource_MLIST
- http://www.redhat.com/support/errata/RHSA-2011-0871.html vendor-advisoryx_refsource_REDHAT
- http://www.securityfocus.com/bid/47738 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2011-1775 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=702470 x_refsource_CONFIRMIssue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=702672 x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2011-1775
- https://www.cve.org/CVERecord?id=CVE-2011-1775
Change history (0)
No recorded changes yet.