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Fencer Intel
high 7.5

CVE-2014-3676 json

Heap-based buffer overflow in Shim allows remote attackers to execute arbitrary code via a crafted IPv6 address, related to the "tftp:// DH…

published 2014-10-22 12 y ago modified 2026-06-17 4 mo ago also EUVD-2014-3624

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.2%
EPSS 5.2% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

Heap-based buffer overflow in Shim allows remote attackers to execute arbitrary code via a crafted IPv6 address, related to the "tftp:// DHCPv6 boot option."

Patch / fix

  • redhat shim 0.8
  • shim Ubuntu 14.04 LTS 0.8-0ubuntu2

ubuntu advisories UBUNTU-CVE-2014-3676

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • shim RHEL 7 0.7-8.el7_0
  • mokutil RHEL 7 0.7-8.el7_0
  • shim-signed RHEL 7 0.7-8.el7_0
  • shim-unsigned RHEL 7 0.7-8.el7_0

red hat advisories RHSA-2014:1801

  • shim openSUSE Tumbleweed 0.9-1.1

opensuse advisories openSUSE-SU-2024:10091-1

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-2014-3676 updated cvss 5.8

shim: heap-based buffer overflow flaw in IPv6 address parsing

  • Red Hat Enterprise Linux Client (v. 7) shim 0.7-8.el7_0, mokutil 0.7-8.el7_0, shim-signed 0.7-8.el7_0, shim-unsigned 0.7-8.el7_0 Red Hat Enterprise Linux ComputeNode (v. 7) shim 0.7-8.el7_0, mokutil 0.7-8.el7_0, shim-signed 0.7-8.el7_0, shim-unsigned 0.7-8.el7_0 Red Hat Enterprise Linux Server (v. 7) shim 0.7-8.el7_0, mokutil 0.7-8.el7_0, shim-signed 0.7-8.el7_0, shim-unsigned 0.7-8.el7_0 Red Hat Enterprise Linux Workstation (v. 7) shim 0.7-8.el7_0, mokutil 0.7-8.el7_0, shim-signed 0.7-8.el7_0, shim-unsigned 0.7-8.el7_0
    fixed: vendor fix RHSA-2014:1801

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

5.23% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • openwall.com http://www.openwall.com/lists/oss-security/2014/10/13/4 referenced PoC, tagged "exploit" by a source, unverified

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

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.