CVE-2014-6271

critical

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.

References

https://www.suse.com/support/shellshock/

https://www.arista.com/en/support/advisories-notices/security-advisories/1008-security-advisory-0006

https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk102673&src=securityAlerts

https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-c04497075

https://support.f5.com/kb/en-us/solutions/public/15000/600/sol15629.html

https://support.citrix.com/article/CTX200217

https://support.apple.com/kb/HT6535

https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10648

http://www.vmware.com/security/advisories/VMSA-2014-0010.html

http://www.us-cert.gov/ncas/alerts/TA14-268A

http://www.ubuntu.com/usn/USN-2362-1

http://www.qnap.com/i/en/support/con_show.php?cid=61

http://www.oracle.com/technetwork/topics/security/bashcve-2014-7169-2317675.html

http://www.novell.com/support/kb/doc.php?id=7015721

http://www.novell.com/support/kb/doc.php?id=7015701

http://www.kb.cert.org/vuls/id/252743

http://www.debian.org/security/2014/dsa-3032

http://www-01.ibm.com/support/docview.wss?uid=swg21687079

http://www-01.ibm.com/support/docview.wss?uid=swg21686494

http://www-01.ibm.com/support/docview.wss?uid=swg21686447

http://www-01.ibm.com/support/docview.wss?uid=swg21686445

http://www-01.ibm.com/support/docview.wss?uid=swg21686246

http://www-01.ibm.com/support/docview.wss?uid=swg21686131

http://www-01.ibm.com/support/docview.wss?uid=swg21686084

http://www-01.ibm.com/support/docview.wss?uid=swg21685749

http://www-01.ibm.com/support/docview.wss?uid=swg21685733

http://www-01.ibm.com/support/docview.wss?uid=swg21685604

http://www-01.ibm.com/support/docview.wss?uid=swg21685541

http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004915

http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004898

http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004897

http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004879

http://www-01.ibm.com/support/docview.wss?uid=isg3T1021361

http://www-01.ibm.com/support/docview.wss?uid=isg3T1021279

http://www-01.ibm.com/support/docview.wss?uid=isg3T1021272

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140926-bash

http://support.novell.com/security/cve/CVE-2014-6271.html

http://support.apple.com/kb/HT6495

http://seclists.org/fulldisclosure/2014/Oct/0

http://rhn.redhat.com/errata/RHSA-2014-1354.html

http://rhn.redhat.com/errata/RHSA-2014-1295.html

http://rhn.redhat.com/errata/RHSA-2014-1294.html

http://rhn.redhat.com/errata/RHSA-2014-1293.html

http://packetstormsecurity.com/files/161107/SonicWall-SSL-VPN-Shellshock-Remote-Code-Execution.html

http://marc.info/?l=bugtraq&m=142805027510172&w=2

http://marc.info/?l=bugtraq&m=142721162228379&w=2

http://marc.info/?l=bugtraq&m=142719845423222&w=2

http://marc.info/?l=bugtraq&m=142546741516006&w=2

http://marc.info/?l=bugtraq&m=142358078406056&w=2

http://marc.info/?l=bugtraq&m=142358026505815&w=2

http://marc.info/?l=bugtraq&m=142118135300698&w=2

http://marc.info/?l=bugtraq&m=142113462216480&w=2

http://marc.info/?l=bugtraq&m=141879528318582&w=2

http://marc.info/?l=bugtraq&m=141694386919794&w=2

http://marc.info/?l=bugtraq&m=141585637922673&w=2

http://marc.info/?l=bugtraq&m=141577297623641&w=2

http://marc.info/?l=bugtraq&m=141577241923505&w=2

http://marc.info/?l=bugtraq&m=141577137423233&w=2

http://marc.info/?l=bugtraq&m=141576728022234&w=2

http://marc.info/?l=bugtraq&m=141450491804793&w=2

http://marc.info/?l=bugtraq&m=141383465822787&w=2

http://marc.info/?l=bugtraq&m=141383353622268&w=2

http://marc.info/?l=bugtraq&m=141383304022067&w=2

http://marc.info/?l=bugtraq&m=141383244821813&w=2

http://marc.info/?l=bugtraq&m=141383196021590&w=2

http://marc.info/?l=bugtraq&m=141383138121313&w=2

http://marc.info/?l=bugtraq&m=141383081521087&w=2

http://marc.info/?l=bugtraq&m=141383026420882&w=2

http://marc.info/?l=bugtraq&m=141345648114150&w=2

http://marc.info/?l=bugtraq&m=141330468527613&w=2

http://marc.info/?l=bugtraq&m=141330425327438&w=2

http://marc.info/?l=bugtraq&m=141319209015420&w=2

http://marc.info/?l=bugtraq&m=141235957116749&w=2

http://marc.info/?l=bugtraq&m=141216668515282&w=2

http://marc.info/?l=bugtraq&m=141216207813411&w=2

http://lists.opensuse.org/opensuse-updates/2014-10/msg00025.html

http://lists.opensuse.org/opensuse-updates/2014-10/msg00023.html

http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00004.html

http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00049.html

http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00044.html

http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00040.html

http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00037.html

http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00034.html

http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00029.html

http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00028.html

http://linux.oracle.com/errata/ELSA-2014-1294.html

http://linux.oracle.com/errata/ELSA-2014-1293.html

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10673

http://jvndb.jvn.jp/jvndb/JVNDB-2014-000126

http://advisories.mageia.org/MGASA-2014-0388.html

https://www.theregister.com/2014/09/30/third_patch_brings_more_admin_shellshock_for_the_battered_and_bashed/

https://www.tenable.com/blog/from-bugs-to-breaches-25-significant-cves-as-mitre-cve-turns-25

https://www.tenable.com/blog/sea-turtle-dns-hijacking-campaign-utilizes-at-least-seven-patched-vulnerabilities

https://support.citrix.com/article/CTX200223

https://bugzilla.redhat.com/show_bug.cgi?id=1141597

http://jvn.jp/en/jp/JVN55667175/index.html

Details

Source: Mitre, NVD

Published: 2014-09-24

Updated: 2025-04-12

Named Vulnerability: shellshockNamed Vulnerability: ShellshockNamed Vulnerability: Bash BugKnown Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.9422