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CVE-2014-6278

HIGHCVSS 8.8/10Actively ExploitedEPSS 99.62%

Last modified

CVE-2014-6278 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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 commands 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, CVE-2014-7169, and CVE-2014-6277.. CISA has confirmed active exploitation in the wild. EPSS estimates a 99.62% chance of exploitation in the next 30 days.

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 commands 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, CVE-2014-7169, and CVE-2014-6277.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability
99.62%

99.9th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .

Weakness Enumeration

Affected Software

VendorProductVersions
GnuBash1.14.0
GnuBash1.14.1
GnuBash1.14.2
GnuBash1.14.3
GnuBash1.14.4
GnuBash1.14.5
GnuBash1.14.6
GnuBash1.14.7
GnuBash2.0
GnuBash2.01
GnuBash2.01.1
GnuBash2.02
GnuBash2.02.1
GnuBash2.03
GnuBash2.04
GnuBash2.05
GnuBash3.0
GnuBash3.0.16
GnuBash3.1
GnuBash3.2
GnuBash3.2.48
GnuBash4.0
GnuBash4.1
GnuBash4.2
GnuBash4.3

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2014-6278?
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 commands 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, CVE-2014-7169, and CVE-2014-6277.
How severe is CVE-2014-6278?
CVE-2014-6278 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 99.62% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2014-6278?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2014-6278?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST