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Fencer Intel
high 7.5

CVE-2014-8240 json

Integer overflow in TigerVNC allows remote VNC servers to cause a denial of service (crash) and possibly execute arbitrary code via vectors…

published 12y ago modified 4mo ago also EUVD-2014-8081

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.5%
EPSS 3.5% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

Integer overflow in TigerVNC allows remote VNC servers to cause a denial of service (crash) and possibly execute arbitrary code via vectors related to screen size handling, which triggers a heap-based buffer overflow, a similar issue to CVE-2014-6051.

Patch / fix

  • tigervnc Debian 14, Debian 13, Debian 12 1.7.0-1

debian advisories DEBIAN-CVE-2014-8240

  • tigervnc RHEL 7 1.3.1-3.el7
  • tigervnc-icons RHEL 7 1.3.1-3.el7
  • tigervnc-server RHEL 7 1.3.1-3.el7
  • tigervnc-license RHEL 7 1.3.1-3.el7
  • tigervnc-server-applet RHEL 7 1.3.1-3.el7
  • tigervnc-server-module RHEL 7 1.3.1-3.el7
  • tigervnc-server-minimal RHEL 7 1.3.1-3.el7

red hat advisories RHSA-2015:2233

  • tigervnc openSUSE Tumbleweed 1.7.0-2.1

opensuse advisories openSUSE-SU-2024:10056-1

Is CVE-2014-8240 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2014-8240 updated cvss 6.8

tigervnc: integer overflow flaw, leading to a heap-based buffer overflow in screen size handling

  • Red Hat Enterprise Linux 5 vnc Red Hat Enterprise Linux 6 tigervnc, tigervnc-server, tigervnc-server-applet, tigervnc-server-module
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) tigervnc 1.3.1-3.el7, tigervnc-icons 1.3.1-3.el7, tigervnc-server 1.3.1-3.el7, tigervnc-license 1.3.1-3.el7, tigervnc-server-minimal 1.3.1-3.el7 Red Hat Enterprise Linux Client Optional (v. 7) tigervnc-server-applet 1.3.1-3.el7, tigervnc-server-module 1.3.1-3.el7 Red Hat Enterprise Linux ComputeNode (v. 7) tigervnc 1.3.1-3.el7, tigervnc-license 1.3.1-3.el7, tigervnc-server-minimal 1.3.1-3.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) tigervnc 1.3.1-3.el7, tigervnc-icons 1.3.1-3.el7, tigervnc-server 1.3.1-3.el7, tigervnc-server-applet 1.3.1-3.el7, tigervnc-server-module 1.3.1-3.el7 Red Hat Enterprise Linux Server (v. 7) tigervnc 1.3.1-3.el7, tigervnc-icons 1.3.1-3.el7, tigervnc-server 1.3.1-3.el7, tigervnc-license 1.3.1-3.el7, tigervnc-server-minimal 1.3.1-3.el7 Red Hat Enterprise Linux Server Optional (v. 7) tigervnc-server-applet 1.3.1-3.el7, tigervnc-server-module 1.3.1-3.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) tigervnc 1.3.1-3.el7, tigervnc-icons 1.3.1-3.el7, tigervnc-server 1.3.1-3.el7, tigervnc-license 1.3.1-3.el7, tigervnc-server-minimal 1.3.1-3.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) tigervnc-server-applet 1.3.1-3.el7, tigervnc-server-module 1.3.1-3.el7
    fixed: vendor fix RHSA-2015:2233

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

3.55% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/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 Intel 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.