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Actively exploited · Published Sep 25, 2014 · Assigned by mitre

CVE-2014-7169

Critical 9.8 Exploited

In plain English

A critical-severity OS command injection in Bourne-Again Shell (Bash) from GNU. Attackers are actively exploiting it in the wild (listed by CISA on January 28, 2022). The chance it is exploited in the next 30 days is estimated at 99.9% (higher than 99.9% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)99.9%top 0.0% of all CVEs
Exploited in the wildYesCISA KEV since Jan 28, 2022
Attack tooling1Public PoC

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by Jul 28, 2022.

Official description

GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed function definitions in the values of environment variables, which allows remote attackers to write to files or possibly have unknown other impact 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12bash4.3-9.2DEBIAN-CVE-2014-7169
Debian:13bash4.3-9.2DEBIAN-CVE-2014-7169
Debian:14bash4.3-9.2DEBIAN-CVE-2014-7169

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References