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Fencer Vulns
critical 9.8

CVE-2017-5581 json

Buffer overflow in the ModifiablePixelBuffer::fillRect function in TigerVNC before 1.7.1 allows remote servers to execute arbitrary code vi…

published 2017-02-28 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-14682

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.2%
EPSS 4.2% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

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.

Patch / fix

  • tigervnc Debian 14, Debian 13, Debian 12 1.7.0+dfsg-3

debian advisories DEBIAN-CVE-2017-5581

  • fltk RHEL 7 1.3.4-1.el7
  • tigervnc RHEL 7 1.8.0-1.el7
  • fltk-fluid RHEL 7 1.3.4-1.el7
  • tigervnc-icons RHEL 7 1.8.0-1.el7
  • tigervnc-server RHEL 7 1.8.0-1.el7
  • tigervnc-license RHEL 7 1.8.0-1.el7
  • tigervnc-server-applet RHEL 7 1.8.0-1.el7
  • tigervnc-server-module RHEL 7 1.8.0-1.el7

red hat advisories RHSA-2017:2000RHSA-2017:0630

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-5581 updated cvss 3.1

tigervnc: Buffer overflow in ModifiablePixelBuffer::fillRect

  • Red Hat Enterprise Linux Client (v. 7) fltk 1.3.4-1.el7, tigervnc 1.8.0-1.el7, fltk-fluid 1.3.4-1.el7, tigervnc-icons 1.8.0-1.el7, tigervnc-server 1.8.0-1.el7, tigervnc-license 1.8.0-1.el7, +3 more Red Hat Enterprise Linux Client Optional (v. 7) fltk 1.3.4-1.el7, tigervnc 1.8.0-1.el7, fltk-fluid 1.3.4-1.el7, tigervnc-icons 1.8.0-1.el7, tigervnc-server 1.8.0-1.el7, tigervnc-license 1.8.0-1.el7, +3 more Red Hat Enterprise Linux ComputeNode (v. 7) tigervnc 1.8.0-1.el7, tigervnc-icons 1.8.0-1.el7, tigervnc-server 1.8.0-1.el7, tigervnc-license 1.8.0-1.el7, tigervnc-server-applet 1.8.0-1.el7, tigervnc-server-module 1.8.0-1.el7, +1 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) fltk 1.3.4-1.el7, tigervnc 1.8.0-1.el7, fltk-fluid 1.3.4-1.el7, tigervnc-icons 1.8.0-1.el7, tigervnc-server 1.8.0-1.el7, tigervnc-license 1.8.0-1.el7, +3 more
    fixed: vendor fix RHSA-2017:2000
  • Red Hat Enterprise Linux Desktop (v. 6) tigervnc 1.1.0-24.el6, tigervnc-server 1.1.0-24.el6, tigervnc-server-applet 1.1.0-24.el6, tigervnc-server-module 1.1.0-24.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) tigervnc 1.1.0-24.el6, tigervnc-server 1.1.0-24.el6, 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, tigervnc-server-module 1.1.0-24.el6 Red Hat Enterprise Linux Server (v. 6) tigervnc 1.1.0-24.el6, tigervnc-server 1.1.0-24.el6, tigervnc-server-applet 1.1.0-24.el6, tigervnc-server-module 1.1.0-24.el6
    fixed: vendor fix RHSA-2017:0630
  • Red Hat Enterprise Linux Server (v. 7) fltk 1.3.4-1.el7, tigervnc 1.8.0-1.el7, fltk-fluid 1.3.4-1.el7, tigervnc-icons 1.8.0-1.el7, tigervnc-server 1.8.0-1.el7, tigervnc-license 1.8.0-1.el7, +3 more
    fixed: vendor fix RHSA-2017:2000
  • Red Hat Enterprise Linux Server Optional (v. 6) tigervnc 1.1.0-24.el6, tigervnc-server 1.1.0-24.el6, tigervnc-server-applet 1.1.0-24.el6, tigervnc-server-module 1.1.0-24.el6
    fixed: vendor fix RHSA-2017:0630
  • Red Hat Enterprise Linux Server Optional (v. 7) fltk 1.3.4-1.el7, tigervnc 1.8.0-1.el7, fltk-fluid 1.3.4-1.el7, tigervnc-icons 1.8.0-1.el7, tigervnc-server 1.8.0-1.el7, tigervnc-license 1.8.0-1.el7, +3 more
    fixed: vendor fix RHSA-2017:2000
  • Red Hat Enterprise Linux Workstation (v. 6) tigervnc 1.1.0-24.el6, tigervnc-server 1.1.0-24.el6, tigervnc-server-applet 1.1.0-24.el6, tigervnc-server-module 1.1.0-24.el6
    fixed: vendor fix RHSA-2017:0630
  • Red Hat Enterprise Linux Workstation (v. 7) fltk 1.3.4-1.el7, tigervnc 1.8.0-1.el7, fltk-fluid 1.3.4-1.el7, tigervnc-icons 1.8.0-1.el7, tigervnc-server 1.8.0-1.el7, tigervnc-license 1.8.0-1.el7, +3 more
    fixed: vendor fix RHSA-2017:2000
  • Red Hat Enterprise Linux Workstation Optional (v. 6) tigervnc 1.1.0-24.el6, tigervnc-server 1.1.0-24.el6, tigervnc-server-applet 1.1.0-24.el6, tigervnc-server-module 1.1.0-24.el6
    fixed: vendor fix RHSA-2017:0630
show 1 more
  • Red Hat Enterprise Linux Workstation Optional (v. 7) fltk 1.3.4-1.el7, tigervnc 1.8.0-1.el7, fltk-fluid 1.3.4-1.el7, tigervnc-icons 1.8.0-1.el7, tigervnc-server 1.8.0-1.el7, tigervnc-license 1.8.0-1.el7, +3 more
    fixed: vendor fix RHSA-2017:2000

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.25% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.