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Fencer Intel
critical 10.0

CVE-2014-6277 in the critical feed json

GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote at…

published 12y ago modified 4mo ago also EUVD-2014-6162

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
64.3%
EPSS 64.3% chance of exploitation in 30 days, percentile 99.2%
public exploits
3
Exploit-DB

Summary

GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized memory access, and untrusted-pointer read and write operations) via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other situations in which setting the environment occurs across a privilege boundary from Bash execution. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-6271 and CVE-2014-7169.

Patch / fix

  • bash Debian 14, Debian 13, Debian 12 4.3-9.2

debian advisories DEBIAN-CVE-2014-6277

  • bash Ubuntu 14.04 LTS 4.3-7ubuntu1.5

ubuntu advisories UBUNTU-CVE-2014-6277

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

  • bash SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 +2 more 4.2-82.1

suse advisories SUSE-SU-2016:2872-1

  • bash openSUSE Tumbleweed 7.0-92.1

opensuse advisories openSUSE-SU-2024:10106-1

  • bash Arch Linux 4.3.027-1

arch linux advisories AVG-924

Is CVE-2014-6277 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-2014-6277 updated cvss 7.5

bash: uninitialized here document closing delimiter pointer use

  • Red Hat Enterprise Linux 4 bash Red Hat Enterprise Linux 5 bash Red Hat Enterprise Linux 6 bash Red Hat Enterprise Linux 7 bash Red Hat Enterprise Virtualization 3 rhev-hypervisor
    not affected: vulnerable code not present

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

Timeline

  1. Published
  2. First public exploit (EDB-36933)

Exploit prediction

64.33% chance of exploitation in the next 30 days, higher than 99.2% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-36933 dhclient 4.1 - Bash Environment Variable Command Injection (Shellshock) remote, 2014-09-29
  • EDB-35081 Binary File Descriptor Library (libbfd) - Out-of-Bounds Crash dos, 2014-10-27
  • EDB-34860 GNU bash 4.3.11 - Environment Variable dhclient remote, 2014-10-02
  • lcamtuf.blogspot.com http://lcamtuf.blogspot.com/2014/09/bash-bug-apply-unofficial-patch-now.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

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.