CVE-2014-6271

CriticalActively exploited (CISA KEV)

Description

GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute arbitrary code 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, aka "ShellShock." NOTE: the original fix for this issue was incorrect; CVE-2014-7169 has been assigned to cover the vulnerability that is still present after the incorrect fix.

SeverityCritical
CVSS9.8
Exploit probability—
ProductGNU Bourne-Again Shell (Bash)
PublishedSep 24, 2014
First seenSep 24, 2014
Added to KEVJan 28, 2022

How to fix

CISA required action

Apply updates per vendor instructions.

CISA due date: Jul 28, 2022
Update
  • arista eos4.9.12, 4.10.9, 4.11.11, 4.12.9, 4.13.9, 4.14.4f or later
  • qnap qts4.1.1 or later

Affected products

ProductAffected versionsFixed in
gnu bashv ≤ 4.3—
arista eos4.9.0 ≤ v < 4.9.12, 4.10.0 ≤ v < 4.10.9, 4.11.0 ≤ v < 4.11.11, 4.12.0 ≤ v < 4.12.9, 4.13.0 ≤ v < 4.13.9, 4.14.0 ≤ v < 4.14.4f4.9.12, 4.10.9, 4.11.11, 4.12.9, 4.13.9, 4.14.4f
oracle linux4, 5, 6—
qnap qtsv < 4.1.1, 4.1.14.1.1
mageia mageia3.0, 4.0—
redhat gluster_storage_server_for_on-premise2.1—
redhat virtualization3.4—
redhat enterprise_linux4.0, 5.0, 6.0, 7.0—
redhat enterprise_linux_desktop5.0, 6.0, 7.0—
redhat enterprise_linux_eus5.9, 6.4, 6.5, 7.3, 7.4, 7.5, 7.6, 7.7—
redhat enterprise_linux_for_ibm_z_systems5.9_s390x, 6.4_s390x, 6.5_s390x, 7.3_s390x, 7.4_s390x, 7.5_s390x, 7.6_s390x, 7.7_s390x—
redhat enterprise_linux_for_power_big_endian5.0_ppc, 5.9_ppc, 6.0_ppc64, 6.4_ppc64, 7.0_ppc64—
redhat enterprise_linux_for_power_big_endian_eus6.5_ppc64, 7.3_ppc64, 7.4_ppc64, 7.5_ppc64, 7.6_ppc64, 7.7_ppc64—
redhat enterprise_linux_for_scientific_computing6.0, 7.0—
redhat enterprise_linux_server5.0, 6.0, 7.0—
redhat enterprise_linux_server_aus5.6, 5.9, 6.2, 6.4, 6.5, 7.3, 7.4, 7.6, 7.7—
redhat enterprise_linux_server_from_rhui5.0, 6.0, 7.0—
redhat enterprise_linux_server_tus6.5, 7.3, 7.6, 7.7—
redhat enterprise_linux_workstation5.0, 6.0, 7.0—
suse studio_onsite1.3—
opensuse opensuse12.3, 13.1, 13.2—
suse linux_enterprise_desktop11, 12—
suse linux_enterprise_server10, 11, 12—
suse linux_enterprise_software_development_kit11, 12—
debian debian_linux7.0—
ibm infosphere_guardium_database_activity_monitoring8.2, 9.0, 9.1—
ibm pureapplication_system1.0.0.0 ≤ v ≤ 1.0.0.4, 1.1.0.0 ≤ v ≤ 1.1.0.4, 2.0.0.0—
ibm qradar_risk_manager7.1.0—
ibm qradar_security_information_and_event_manager7.1.0, 7.1.1, 7.1.2, 7.2, 7.2.0, 7.2.1, 7.2.2, 7.2.3, 7.2.4, 7.2.5, 7.2.6, 7.2.7, 7.2.8, 7.2.8.15, 7.2.9—
ibm qradar_vulnerability_manager7.2.0, 7.2.1, 7.2.2, 7.2.3, 7.2.4, 7.2.6, 7.2.8—

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