NVD / CVE Program· CNA debian

CVE-2014-6277: GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote…

CriticalCVSS 10.0 · v2.0—Proof of concept Fix available

Noroxi assessment

Priority: Plan (action score 59/100)

Public proof-of-concept code exists (Exploit-DB); there is no record of exploitation in the wild.
Probability of exploitation in the next 30 days: 64.3% (FIRST EPSS); higher than 99.2% of all records.
No special conditions are required; it is repeatable.
Fixed version: bash (Debian:12) 4.3-9.2; bash (openSUSE:Tumbleweed) 7.0-92.1; bash (SUSE:Linux Enterprise Desktop 12 SP1) 4.2-82.1.

Add it to your regular patch cycle. Upgrade to bash (Debian:12) 4.3-9.2; bash (openSUSE:Tumbleweed) 7.0-92.1; bash (SUSE:Linux Enterprise Desktop 12 SP1) 4.2-82.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published: Sep 27, 2014
Updated: Jun 16, 2026
EPSS: 64.3% · 99th percentile
CWE: CWE-78

Report tools

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Action score

Plan

Add it to your regular patch cycle.

CVSS: 40 / 40 · 10.0 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 19 / 30 · 64.3%

Get told when this record changes

Not in KEV: no record of exploitation in the wild
Proof of concept exists, no weaponized module
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
gnu	bash	cpe:2.3:a:gnu:bash

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

gnu bash1.14.0
gnu bash1.14.1
gnu bash1.14.2
gnu bash1.14.3
gnu bash1.14.4
gnu bash1.14.5
gnu bash1.14.6
gnu bash1.14.7

+12 more rows

gnu bash2.0
gnu bash2.01
gnu bash2.01.1
gnu bash2.02
gnu bash2.02.1
gnu bash2.03
gnu bash2.04
gnu bash2.05
gnu bash3.0
gnu bash3.0.16
gnu bash3.1
gnu bash3.2

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	bash	before 4.3-9.2	4.3-9.2
openSUSE:Tumbleweed	bash	before 7.0-92.1	7.0-92.1
SUSE:Linux Enterprise Desktop 12 SP1	bash	before 4.2-82.1	4.2-82.1

Same product

gnu: all records

Other highest-scoring records for the same primary product.

CVE-2014-7169GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed function definitions in the values of environment…KEV
99Now
CVE-2014-6271GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote…KEV
99Now
CVE-2014-6278GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote…KEV
95Now

Published before and after this one in the same product

← EarlierCVE-2010-0002Jan 14, 2010 · The /etc/profile.d/60alias.sh script in the Mandriva bash package for Bash 2.05b, 3.0, 3.2, 3.2.48, and 4.0 enables the…
8Monitor
← EarlierCVE-2012-3410Aug 27, 2012 · Stack-based buffer overflow in lib/sh/eaccess.c in GNU Bash before 4.2 patch 33 might allow local users to bypass intended restricted shell…
18Monitor
Later →CVE-2014-7186Sep 28, 2014 · The redirection implementation in parse.y in GNU Bash through 4.3 bash43-026 allows remote attackers to cause a denial of service…
59Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
debian:bash	4.3-9.2 · Debian:12	Package registry (OSV)
opensuse:bash	7.0-92.1 · openSUSE:Tumbleweed	Package registry (OSV)
suse:bash	4.2-82.1 · SUSE:Linux Enterprise Desktop 12 SP1	Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

Exploit-DB entry ×3

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Exploit-DB entry	dos	2014-10-27
Exploit-DB entry	remote	2014-09-29
Exploit-DB entry	remote	2014-10-02

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

PublishedSep 27, 2014
First PoCSep 29, 2014+1 d
TodayNov 13, 2026+4430 d

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

No special conditions are required; it is repeatable.

If successful

Confidentiality: C · data can be read
Integrity: C · data or configuration can be modified
Availability: C · the service can be disrupted

Attack complexity: Low
Confidentiality impact: C
Integrity impact: C
Availability impact: C

Weakness class (CWE)

CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSS vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

nvd-primary

Root cause

User input is inserted as text into a shell command. The shell may interpret special characters in the input as part of the command.

The bug in code

The whole CWE-78 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1const host = req.body.host;
2exec("ping -c 1 " + host, onResult);

Fixed

1const host = req.body.host;
2if (!/^[a-z0-9.-]{1,253}$/i.test(host)) return res.sendStatus(400);
3execFile("ping", ["-c", "1", host], onResult);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log (1)

Fix✗ → ✓Sep 28, 2026, 10:45 PM UTC

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References

jvn.jp/en/jp/JVN55667175/index.html

Show all references (19 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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