# CVE-2014-6271

## Summary

- **CVE ID:** CVE-2014-6271
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Sep 24, 2014
- **Last Modified:** Sep 16, 2026

## 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.

## Affected Products

- n/a — n/a (n/a)

## References

- [CNA](https://www.exploit-db.com/exploits/37816/)
- [CNA](http://packetstormsecurity.com/files/128517/VMware-Security-Advisory-2014-0010.html)
- [CNA](http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00034.html)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004897)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=swg21685749)
- [CNA](http://marc.info/?l=bugtraq&m=141577137423233&w=2)
- [CNA](http://marc.info/?l=bugtraq&m=142719845423222&w=2)
- [CNA](https://www.exploit-db.com/exploits/39918/)
- [CNA](http://marc.info/?l=bugtraq&m=141216668515282&w=2)
- [CNA](http://rhn.redhat.com/errata/RHSA-2014-1295.html)
- [CNA](http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00037.html)
- [CNA](https://securityblog.redhat.com/2014/09/24/bash-specially-crafted-environment-variables-code-injection-attack/)
- [CNA](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk102673&src=securityAlerts)
- [CNA](http://marc.info/?l=bugtraq&m=141383138121313&w=2)
- [CNA](http://marc.info/?l=bugtraq&m=142721162228379&w=2)
- [CNA](http://www.securityfocus.com/archive/1/533593/100/0/threaded)
- [CNA](http://marc.info/?l=bugtraq&m=142358026505815&w=2)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=swg21686084)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=swg21686479)
- [CNA](http://secunia.com/advisories/61188)
- [CNA](http://www.websense.com/support/article/kbarticle/Vulnerabilities-resolved-in-TRITON-APX-Version-8-0)
- [CNA](http://jvn.jp/en/jp/JVN55667175/index.html)
- [CNA](http://secunia.com/advisories/61676)
- [CNA](https://www.exploit-db.com/exploits/40619/)
- [CNA](http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00044.html)
- [CNA](http://secunia.com/advisories/60433)
- [CNA](https://www.exploit-db.com/exploits/38849/)
- [CNA](http://marc.info/?l=bugtraq&m=141383026420882&w=2)
- [CNA](http://marc.info/?l=bugtraq&m=141585637922673&w=2)
- [CNA](http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10673)
- [CNA](http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00049.html)
- [CNA](http://marc.info/?l=bugtraq&m=141576728022234&w=2)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=swg21685541)
- [CNA](http://secunia.com/advisories/61715)
- [CNA](http://www.oracle.com/technetwork/topics/security/bashcve-2014-7169-2317675.html)
- [CNA](http://secunia.com/advisories/61816)
- [CNA](http://lists.opensuse.org/opensuse-updates/2014-10/msg00025.html)
- [CNA](http://secunia.com/advisories/61442)
- [CNA](http://marc.info/?l=bugtraq&m=142358078406056&w=2)
- [CNA](http://marc.info/?l=bugtraq&m=142805027510172&w=2)
- [CNA](http://secunia.com/advisories/61283)
- [CNA](http://marc.info/?l=bugtraq&m=142113462216480&w=2)
- [CNA](http://www.ubuntu.com/usn/USN-2362-1)
- [CNA](https://kc.mcafee.com/corporate/index?page=content&id=SB10085)
- [CNA](http://lists.opensuse.org/opensuse-updates/2014-10/msg00023.html)
- [CNA](http://secunia.com/advisories/61654)
- [CNA](http://secunia.com/advisories/61542)
- [CNA](http://www.novell.com/support/kb/doc.php?id=7015701)
- [CNA](http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5096315)
- [CNA](http://secunia.com/advisories/62312)
- [CNA](http://secunia.com/advisories/59272)
- [CNA](http://marc.info/?l=bugtraq&m=141319209015420&w=2)
- [CNA](https://support.f5.com/kb/en-us/solutions/public/15000/600/sol15629.html)
- [CNA](http://marc.info/?l=bugtraq&m=141879528318582&w=2)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=swg21685604)
- [CNA](http://marc.info/?l=bugtraq&m=142118135300698&w=2)
- [CNA](http://secunia.com/advisories/61703)
- [CNA](http://support.apple.com/kb/HT6495)
- [CNA](http://www.kb.cert.org/vuls/id/252743)
- [CNA](http://secunia.com/advisories/61065)
- [CNA](http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00029.html)
- [CNA](http://marc.info/?l=bugtraq&m=141383196021590&w=2)
- [CNA](http://marc.info/?l=bugtraq&m=141383081521087&w=2)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=swg21686445)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=swg21686131)
- [CNA](http://www.securityfocus.com/bid/70103)
- [CNA](http://jvndb.jvn.jp/jvndb/JVNDB-2014-000126)
- [CNA](http://www.us-cert.gov/ncas/alerts/TA14-268A)
- [CNA](http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00028.html)
- [CNA](http://secunia.com/advisories/61641)
- [CNA](https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10648)
- [CNA](https://access.redhat.com/node/1200223)
- [CNA](http://packetstormsecurity.com/files/137376/IPFire-Bash-Environment-Variable-Injection-Shellshock.html)
- [CNA](http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00004.html)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004898)
- [CNA](http://archives.neohapsis.com/archives/bugtraq/2014-10/0101.html)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=swg21685914)
- [CNA](http://seclists.org/fulldisclosure/2014/Oct/0)
- [CNA](http://www.mandriva.com/security/advisories?name=MDVSA-2015:164)
- [CNA](http://rhn.redhat.com/errata/RHSA-2014-1293.html)
- [CNA](https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-c04497075)
- [CNA](http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00040.html)
- [CNA](http://secunia.com/advisories/60325)
- [CNA](https://help.ecostruxureit.com/display/public/UADCO8x/StruxureWare+Data+Center+Operation+Software+Vulnerability+Fixes)
- [CNA](http://secunia.com/advisories/60024)
- [CNA](http://packetstormsecurity.com/files/128567/CA-Technologies-GNU-Bash-Shellshock.html)
- [CNA](https://www.exploit-db.com/exploits/34879/)
- [CNA](https://access.redhat.com/articles/1200223)
- [CNA](http://secunia.com/advisories/62343)
- [CNA](http://secunia.com/advisories/61565)
- [CNA](https://www.suse.com/support/shellshock/)
- [CNA](http://marc.info/?l=bugtraq&m=141450491804793&w=2)
- [CNA](http://secunia.com/advisories/61313)
- [CNA](http://secunia.com/advisories/61873)
- [CNA](http://secunia.com/advisories/61485)
- [CNA](http://secunia.com/advisories/60947)
- [CNA](https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-c04518183)
- [CNA](https://support.apple.com/kb/HT6535)
- [CNA](http://marc.info/?l=bugtraq&m=141577297623641&w=2)
- [CNA](http://marc.info/?l=bugtraq&m=142546741516006&w=2)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=isg3T1021272)
- [CNA](http://marc.info/?l=bugtraq&m=141383244821813&w=2)
- [CNA](http://secunia.com/advisories/61312)
- [CNA](http://secunia.com/advisories/60193)
- [CNA](http://www.vmware.com/security/advisories/VMSA-2014-0010.html)
- [CNA](http://linux.oracle.com/errata/ELSA-2014-1294.html)
- [CNA](http://secunia.com/advisories/60063)
- [CNA](http://packetstormsecurity.com/files/128573/Apache-mod_cgi-Remote-Command-Execution.html)
- [CNA](http://secunia.com/advisories/60034)
- [CNA](http://marc.info/?l=bugtraq&m=141330425327438&w=2)
- [CNA](http://lcamtuf.blogspot.com/2014/09/quick-notes-about-bash-bug-its-impact.html)
- [CNA](http://secunia.com/advisories/59907)
- [CNA](http://secunia.com/advisories/58200)
- [CNA](http://marc.info/?l=bugtraq&m=141577241923505&w=2)
- [CNA](http://secunia.com/advisories/61643)
- [CNA](http://www.novell.com/support/kb/doc.php?id=7015721)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=swg21687079)
- [CNA](http://secunia.com/advisories/61503)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=swg21686246)
- [CNA](http://rhn.redhat.com/errata/RHSA-2014-1354.html)
- [CNA](https://www.exploit-db.com/exploits/40938/)
- [CNA](http://marc.info/?l=bugtraq&m=141216207813411&w=2)
- [CNA](http://support.novell.com/security/cve/CVE-2014-6271.html)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004915)
- [CNA](http://secunia.com/advisories/61547)
- [CNA](http://marc.info/?l=bugtraq&m=141383465822787&w=2)
- [CNA](http://www.qnap.com/i/en/support/con_show.php?cid=61)
- [CNA](http://marc.info/?l=bugtraq&m=141694386919794&w=2)
- [CNA](http://secunia.com/advisories/61552)
- [CNA](http://secunia.com/advisories/61780)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=isg3T1021279)
- [CNA](https://support.citrix.com/article/CTX200223)
- [CNA](http://www.debian.org/security/2014/dsa-3032)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=swg21686447)
- [CNA](http://secunia.com/advisories/62228)
- [CNA](http://marc.info/?l=bugtraq&m=141330468527613&w=2)
- [CNA](http://secunia.com/advisories/61855)
- [CNA](http://marc.info/?l=bugtraq&m=141235957116749&w=2)
- [CNA](http://secunia.com/advisories/60044)
- [CNA](http://secunia.com/advisories/61291)
- [CNA](http://rhn.redhat.com/errata/RHSA-2014-1294.html)
- [CNA](http://marc.info/?l=bugtraq&m=141345648114150&w=2)
- [CNA](http://secunia.com/advisories/59737)
- [CNA](http://secunia.com/advisories/61287)
- [CNA](http://marc.info/?l=bugtraq&m=141383353622268&w=2)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=1141597)
- [CNA](http://secunia.com/advisories/61711)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=isg3T1021361)
- [CNA](http://marc.info/?l=bugtraq&m=141383304022067&w=2)
- [CNA](http://advisories.mageia.org/MGASA-2014-0388.html)
- [CNA](http://secunia.com/advisories/61128)
- [CNA](https://support.citrix.com/article/CTX200217)
- [CNA](http://secunia.com/advisories/61471)
- [CNA](http://secunia.com/advisories/60055)
- [CNA](http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140926-bash)
- [CNA](http://secunia.com/advisories/61550)
- [CNA](http://secunia.com/advisories/61633)
- [CNA](http://linux.oracle.com/errata/ELSA-2014-1293.html)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=swg21686494)
- [CNA](https://kb.bluecoat.com/index?page=content&id=SA82)
- [CNA](http://secunia.com/advisories/61328)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=swg21685733)
- [CNA](https://www.exploit-db.com/exploits/42938/)
- [CNA](http://secunia.com/advisories/61129)
- [CNA](http://secunia.com/advisories/61700)
- [CNA](http://secunia.com/advisories/61603)
- [CNA](http://secunia.com/advisories/61857)
- [CNA](http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004879)
- [CNA](http://packetstormsecurity.com/files/161107/SonicWall-SSL-VPN-Shellshock-Remote-Code-Execution.html)
- [CNA](https://www.arista.com/en/support/advisories-notices/security-advisories/1008-security-advisory-0006)
- [CISA-ADP](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-6271)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 94.22%
- **EPSS Percentile:** 99.9

## Known Exploited Vulnerabilities (KEV)

- **Date Added:** Jan 28, 2022
- **Due Date:** Jul 28, 2022

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._