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TI-2017-03586 Aliases CVE-2017-5581GHSA-q2c6-v9x6-qvr4

Buffer overflow in the ModifiablePixelBuffer::fillRect function in TigerVNC before 1.7.1…

Priority MEDIUM 49CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.

Summary

Buffer overflow in the ModifiablePixelBuffer::fillRect function in TigerVNC before 1.7.1 allows remote servers to execute arbitrary code via an RRE message with subrectangle outside framebuffer boundaries.

Why it matters now

EPSS 0.04247 91st percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:tigervnc:tigervnc:*:*:*:*:*:*:*:*up to 1.7VulnerableTigerVNC
  • cpe:2.3:a:tigervnc:tigervnc:*:*:*:*:*:*:*:* Versions up to 1.7 Vulnerable ·TigerVNC

Remediation

Red Hat 2 advisories

  • RHSA-2017:2000 Released 2017-08-01 · Red Hat rating Moderate
    tigervnc and fltk security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) fltk-1.3.4-1.el7, tigervnc-1.8.0-1.el7, tigervnc-icons-1.8.0-1.el7 +3
    • Red Hat Enterprise Linux Client Optional (v. 7) fltk-devel-1.3.4-1.el7, fltk-fluid-1.3.4-1.el7, fltk-static-1.3.4-1.el7 +2
    • Red Hat Enterprise Linux ComputeNode (v. 7) tigervnc-1.8.0-1.el7, tigervnc-license-1.8.0-1.el7, tigervnc-server-minimal-1.8.0-1.el7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) fltk-1.3.4-1.el7, fltk-devel-1.3.4-1.el7, fltk-fluid-1.3.4-1.el7 +6
    • Red Hat Enterprise Linux Server (v. 7) fltk-1.3.4-1.el7, fltk-1.3.4-1.el7.ppc, tigervnc-1.8.0-1.el7 +4
    • Red Hat Enterprise Linux Server Optional (v. 7) fltk-devel-1.3.4-1.el7, fltk-devel-1.3.4-1.el7.ppc, fltk-fluid-1.3.4-1.el7 +4
    • Red Hat Enterprise Linux Workstation (v. 7) fltk-1.3.4-1.el7, tigervnc-1.8.0-1.el7, tigervnc-icons-1.8.0-1.el7 +3
    • Red Hat Enterprise Linux Workstation Optional (v. 7) fltk-devel-1.3.4-1.el7, fltk-fluid-1.3.4-1.el7, fltk-static-1.3.4-1.el7 +2
  • RHSA-2017:0630 Released 2017-03-21 · Red Hat rating Moderate
    tigervnc security and bug fix update
    • Red Hat Enterprise Linux Desktop (v. 6) tigervnc-1.1.0-24.el6, tigervnc-server-1.1.0-24.el6
    • Red Hat Enterprise Linux Desktop Optional (v. 6) tigervnc-server-applet-1.1.0-24.el6, tigervnc-server-module-1.1.0-24.el6
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) tigervnc-1.1.0-24.el6, tigervnc-server-1.1.0-24.el6, tigervnc-server-applet-1.1.0-24.el6 +1
    • Red Hat Enterprise Linux Server (v. 6) tigervnc-1.1.0-24.el6, tigervnc-server-1.1.0-24.el6
    • Red Hat Enterprise Linux Server Optional (v. 6) tigervnc-server-applet-1.1.0-24.el6, tigervnc-server-module-1.1.0-24.el6
    • Red Hat Enterprise Linux Workstation (v. 6) tigervnc-1.1.0-24.el6, tigervnc-server-1.1.0-24.el6
    • Red Hat Enterprise Linux Workstation Optional (v. 6) tigervnc-server-applet-1.1.0-24.el6, tigervnc-server-module-1.1.0-24.el6

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2017:2000
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2017:2000
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2017:2000
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2017:2000
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2017:0630
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2017:0630
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2017:0630
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2017:0630
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2017:2000
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2017:0630
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2017:2000
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2017:0630
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2017:2000
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2017:0630
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2017:2000

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-5581
  2. 2026-10-03 Alias added: GHSA-q2c6-v9x6-qvr4

References

Patch 4

Advisory 4

  • TI-2026-26639 Incorrect permission assignment in TigerVNC CVSS 3.1CRITICAL 9.8
  • TI-2014-06801 XRegion in TigerVNC allows remote VNC servers to cause a denial of service (NULL pointer… CVSS 3.0CRITICAL 9.8
  • TI-2014-00011 Out-of-bounds write in TigerVNC CVSS 3.1CRITICAL 9.8
  • TI-2023-05938 Xorg-x11-server: out-of-bounds memory read in rrchangeoutputproperty and rrchangeproviderproperty CVSS 3.1HIGH 7.6
  • TI-2017-05047 In TigerVNC 1.7.1 (VNCSConnectionST.cxx VNCSConnectionST::fence), an authenticated client… CVSS 3.0HIGH 8.8
  • TI-2020-15960 In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers… CVSS 3.1HIGH 8.1
See all 29 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences