$ cve CVE-2014-6277 JSON

CVE-2014-6277 EXPLOIT

10.0

HIGH · CVSS 2.0 · EPSS 69.8% (pctl 99)

Patch early

A public exploit exists.

Description

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.

Scoring

CVSS	10.0 (HIGH, v2.0)
Vector	AV:N/AC:L/Au:N/C:C/I:C/A:C
EPSS	69.78% — more likely to be exploited than 99% of all CVEs
Weakness	CWE-78
On CISA KEV	no
Public exploit	yes
Published	2014-09-27
Last modified	2026-06-17

Affected (1)

Vendor	Product
gnu	bash

Public exploits

Source	Title	Date
exploit-db	Binary File Descriptor Library (libbfd) - Out-of-Bounds Crash	2014-10-27
exploit-db	GNU bash 4.3.11 - Environment Variable dhclient	2014-10-02
exploit-db	dhclient 4.1 - Bash Environment Variable Command Injection (Shellshock)	2014-09-29

References

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