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CVE-2014-6277

UnknownEPSS 64.33%

Last modified

CVE-2014-6277 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 64.33% 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 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.

Metrics

EPSS Probability
64.33%

99.1th percentile

Probability of exploitation in the next 30 days. Learn more

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
Modified

Frequently Asked Questions

What is 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 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.
How severe is CVE-2014-6277?
Severity scoring for CVE-2014-6277 is pending analysis. The EPSS model estimates a 64.33% probability of exploitation in the next 30 days.
How do I fix CVE-2014-6277?
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.

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Source: NVD / NIST