{"id":"CVE-2014-6277","published":"2014-09-27T22:00:00Z","modified":"2024-08-06T12:10:13Z","title":"GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables…","vendor":null,"product":null,"tier":"core","eol":null,"description":{"text":"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.","provenance":"source","from":"CVE.org"},"summary":{"text":"GNU Bash through 4.3 bash43-026 does not properly parse function definitions in environment variable values, allowing remote attackers to execute arbitrary code or cause a denial of service via a crafted environment. This affects systems where environment setting occurs across a privilege boundary from Bash execution, such as OpenSSH sshd with ForceCommand, Apache HTTP Server mod_cgi and mod_cgid, and scripts run by DHCP clients.","provenance":"ai","model":"deepseek-v4-flash","generatedAt":"2026-10-23T03:20:13Z"},"cvss":null,"epss":{"score":0.64326,"percentile":0.99229,"date":"2026-10-28","provenance":"source"},"kev":null,"vulncheckKev":{"dateAdded":"2018-03-01","exploitedFirstSeen":"2018-03-01","ransomware":false,"evidence":[{"url":"https://www.virusbulletin.com/virusbulletin/2018/03/vb2017-paper-router-all-evil-more-just-default-passwords-and-silly-scripts/","date":"2018-03-01"},{"url":"https://blog.talosintelligence.com/content/files/2025/03/2024YiR-report.pdf","date":"2025-03-31"}],"evidenceTotal":2,"provenance":"source"},"exploited":true,"otx":{"pulseCount":1,"pulses":[{"name":"ripe.arin.enom.cpanel.cpcalendar.iana.networksolutions.02050.webdisk.webmail.","url":"https://otx.alienvault.com/pulse/69fdc02bea1e4ec923b01688","created":"2026-05-08"}],"provenance":"machine"},"cwes":[],"references":[{"url":"http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004897","tags":["x_refsource_CONFIRM"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=swg21685749","tags":["x_refsource_CONFIRM"]},{"url":"http://marc.info/?l=bugtraq&m=141577137423233&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk102673&src=securityAlerts","tags":["x_refsource_CONFIRM"]},{"url":"http://linux.oracle.com/errata/ELSA-2014-3093","tags":["x_refsource_CONFIRM"]},{"url":"http://marc.info/?l=bugtraq&m=142721162228379&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://marc.info/?l=bugtraq&m=142358026505815&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=swg21686479","tags":["x_refsource_CONFIRM"]},{"url":"http://jvn.jp/en/jp/JVN55667175/index.html","tags":["third-party-advisory","x_refsource_JVN"]},{"url":"http://secunia.com/advisories/60433","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://marc.info/?l=bugtraq&m=141383026420882&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://marc.info/?l=bugtraq&m=141585637922673&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://marc.info/?l=bugtraq&m=141576728022234&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=swg21685541","tags":["x_refsource_CONFIRM"]},{"url":"http://www.oracle.com/technetwork/topics/security/bashcve-2014-7169-2317675.html","tags":["x_refsource_CONFIRM"]},{"url":"http://secunia.com/advisories/61816","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://lists.opensuse.org/opensuse-updates/2014-10/msg00025.html","tags":["vendor-advisory","x_refsource_SUSE"]},{"url":"http://secunia.com/advisories/61442","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://marc.info/?l=bugtraq&m=142358078406056&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://secunia.com/advisories/61283","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html","tags":["vendor-advisory","x_refsource_APPLE"]},{"url":"https://kc.mcafee.com/corporate/index?page=content&id=SB10085","tags":["x_refsource_CONFIRM"]},{"url":"http://secunia.com/advisories/61654","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://www.ubuntu.com/usn/USN-2380-1","tags":["vendor-advisory","x_refsource_UBUNTU"]},{"url":"http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5096315","tags":["x_refsource_CONFIRM"]},{"url":"http://secunia.com/advisories/62312","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"https://support.f5.com/kb/en-us/solutions/public/15000/600/sol15629.html","tags":["x_refsource_CONFIRM"]},{"url":"http://marc.info/?l=bugtraq&m=141879528318582&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=swg21685604","tags":["x_refsource_CONFIRM"]},{"url":"http://marc.info/?l=bugtraq&m=142118135300698&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://secunia.com/advisories/61703","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://secunia.com/advisories/61065","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://marc.info/?l=bugtraq&m=141383196021590&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://marc.info/?l=bugtraq&m=141383081521087&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=swg21686445","tags":["x_refsource_CONFIRM"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=swg21686131","tags":["x_refsource_CONFIRM"]},{"url":"http://jvndb.jvn.jp/jvndb/JVNDB-2014-000126","tags":["third-party-advisory","x_refsource_JVNDB"]},{"url":"http://secunia.com/advisories/61641","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10648","tags":["x_refsource_CONFIRM"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00004.html","tags":["vendor-advisory","x_refsource_SUSE"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004898","tags":["x_refsource_CONFIRM"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=swg21685914","tags":["x_refsource_CONFIRM"]},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2015:164","tags":["vendor-advisory","x_refsource_MANDRIVA"]},{"url":"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-c04497075","tags":["x_refsource_CONFIRM"]},{"url":"https://support.apple.com/HT205267","tags":["x_refsource_CONFIRM"]},{"url":"http://secunia.com/advisories/60325","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://secunia.com/advisories/60024","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://packetstormsecurity.com/files/128567/CA-Technologies-GNU-Bash-Shellshock.html","tags":["x_refsource_MISC"]},{"url":"http://lcamtuf.blogspot.com/2014/10/bash-bug-how-we-finally-cracked.html","tags":["x_refsource_MISC"]},{"url":"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140926-bash","tags":["vendor-advisory","x_refsource_CISCO"]},{"url":"http://secunia.com/advisories/62343","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://secunia.com/advisories/61565","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"https://www.suse.com/support/shellshock/","tags":["x_refsource_CONFIRM"]},{"url":"http://support.apple.com/HT204244","tags":["x_refsource_CONFIRM"]},{"url":"http://marc.info/?l=bugtraq&m=141450491804793&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://secunia.com/advisories/61313","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://marc.info/?l=bugtraq&m=142289270617409&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://secunia.com/advisories/61485","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-c04518183","tags":["x_refsource_CONFIRM"]},{"url":"http://marc.info/?l=bugtraq&m=141577297623641&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=isg3T1021272","tags":["x_refsource_CONFIRM"]},{"url":"http://marc.info/?l=bugtraq&m=141383244821813&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://secunia.com/advisories/61312","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://linux.oracle.com/errata/ELSA-2014-3094","tags":["x_refsource_CONFIRM"]},{"url":"http://secunia.com/advisories/60193","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://www.vmware.com/security/advisories/VMSA-2014-0010.html","tags":["x_refsource_CONFIRM"]},{"url":"http://secunia.com/advisories/60063","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://secunia.com/advisories/60034","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://secunia.com/advisories/59907","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://secunia.com/advisories/58200","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://marc.info/?l=bugtraq&m=141577241923505&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://secunia.com/advisories/61643","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://www.novell.com/support/kb/doc.php?id=7015721","tags":["x_refsource_CONFIRM"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=swg21687079","tags":["x_refsource_CONFIRM"]},{"url":"http://secunia.com/advisories/61503","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=swg21686246","tags":["x_refsource_CONFIRM"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004915","tags":["x_refsource_CONFIRM"]},{"url":"http://marc.info/?l=bugtraq&m=141383465822787&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://www.qnap.com/i/en/support/con_show.php?cid=61","tags":["x_refsource_CONFIRM"]},{"url":"http://secunia.com/advisories/61552","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://secunia.com/advisories/61780","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=isg3T1021279","tags":["x_refsource_CONFIRM"]},{"url":"https://support.citrix.com/article/CTX200223","tags":["x_refsource_CONFIRM"]},{"url":"http://marc.info/?l=bugtraq&m=141330468527613&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://secunia.com/advisories/60044","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://secunia.com/advisories/61291","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://marc.info/?l=bugtraq&m=141345648114150&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://secunia.com/advisories/61287","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://marc.info/?l=bugtraq&m=141383353622268&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=isg3T1021361","tags":["x_refsource_CONFIRM"]},{"url":"http://lists.apple.com/archives/security-announce/2015/Jan/msg00003.html","tags":["vendor-advisory","x_refsource_APPLE"]},{"url":"http://marc.info/?l=bugtraq&m=141383304022067&w=2","tags":["vendor-advisory","x_refsource_HP"]},{"url":"http://secunia.com/advisories/61128","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"https://support.citrix.com/article/CTX200217","tags":["x_refsource_CONFIRM"]},{"url":"http://secunia.com/advisories/61471","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://secunia.com/advisories/60055","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://secunia.com/advisories/59961","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://secunia.com/advisories/61550","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://secunia.com/advisories/61633","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://lcamtuf.blogspot.com/2014/09/bash-bug-apply-unofficial-patch-now.html","tags":["x_refsource_MISC"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=swg21686494","tags":["x_refsource_CONFIRM"]},{"url":"http://support.novell.com/security/cve/CVE-2014-6277.html","tags":["x_refsource_CONFIRM"]},{"url":"https://kb.bluecoat.com/index?page=content&id=SA82","tags":["x_refsource_CONFIRM"]},{"url":"http://secunia.com/advisories/61328","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=swg21685733","tags":["x_refsource_CONFIRM"]},{"url":"http://secunia.com/advisories/61129","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://secunia.com/advisories/61603","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://secunia.com/advisories/61857","tags":["third-party-advisory","x_refsource_SECUNIA"]},{"url":"http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004879","tags":["x_refsource_CONFIRM"]}],"techniques":[{"id":"T1059.004","name":"Unix Shell","tactics":["execution"],"provenance":"source","basis":"ctid-cve","bases":["ctid-cve"],"basisDetail":"CTID attack_to_cve (Phase 1)","mappingType":"uncategorized","evidence":[],"confidence":"low","confidenceNote":"CTID attack_to_cve Phase 1 \"Uncategorized\" mapping (not staged by impact)"},{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"source","basis":"ctid-cve","bases":["ctid-cve"],"basisDetail":"CTID attack_to_cve (Phase 1)","mappingType":"uncategorized","evidence":[],"confidence":"low","confidenceNote":"CTID attack_to_cve Phase 1 \"Uncategorized\" mapping (not staged by impact)"}],"reports":[{"id":"SRC-cac5a64d298755b4fcba","title":"Industrial Cybersecurity Threat Briefing","publisher":"boozallen.com","url":"https://www.boozallen.com/content/dam/boozallen/documents/2016/09/ukraine-report-when-the-lights-went-out.pdf","date":null,"mentions":[{"quote":"“Vulnerability Summary for CVE-2014-6277,” National Vulnerability Database, September 28, 2014, modified October 9,","start":185731,"end":185846},{"quote":"2015, accessed July 14, 2016, hxxps://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-6277.","start":185848,"end":185941}]}],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2014-6162","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2014-6162","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[{"id":34860,"url":"https://www.exploit-db.com/exploits/34860","title":"GNU bash 4.3.11 - Environment Variable dhclient","type":"remote","platform":"linux","date":"2014-10-02","verified":false,"provenance":"source"},{"id":35081,"url":"https://www.exploit-db.com/exploits/35081","title":"Binary File Descriptor Library (libbfd) - Out-of-Bounds Crash","type":"dos","platform":"linux","date":"2014-10-27","verified":true,"provenance":"source"},{"id":36933,"url":"https://www.exploit-db.com/exploits/36933","title":"dhclient 4.1 - Bash Environment Variable Command Injection (Shellshock)","type":"remote","platform":"linux","date":"2014-09-29","verified":true,"provenance":"source"}],"exploitSources":{"exploitdb":{"count":3,"earliest":"2014-09-29"},"first":{"date":"2014-09-29","source":"Exploit-DB","url":"https://www.exploit-db.com/exploits/36933"},"provenance":"source"},"exploitRefs":["http://packetstormsecurity.com/files/128567/CA-Technologies-GNU-Bash-Shellshock.html"],"flow":[{"stage":"related","techniques":["T1190","T1059.004"],"provenance":"source","lowConfidence":true}],"timeline":[{"date":"2014-09-27","kind":"published","label":"Published (CVE.org)","url":"https://www.cve.org/CVERecord?id=CVE-2014-6277","provenance":"source"},{"date":"2014-09-29","kind":"exploit-public","label":"First public exploit: Exploit-DB (EDB-36933)","url":"https://www.exploit-db.com/exploits/36933","provenance":"source"},{"date":"2018-03-01","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://www.virusbulletin.com/virusbulletin/2018/03/vb2017-paper-router-all-evil-more-just-default-passwords-and-silly-scripts/","provenance":"source"}],"speed":{"daysToPublicExploit":2,"firstExploitFrom":"Exploit-DB","daysToKev":null},"priority":{"score":64.4,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 3164 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.85,"detail":"percentile 0.9923"},{"name":"Named in threat reports","points":3.87,"detail":"1 report"},{"name":"Public exploit code","points":5.0,"detail":"3 Exploit-DB entries; 1 NVD exploit link"},{"name":"Mentioned in OTX pulses","points":0.68,"detail":"1 pulse"},{"name":"CVSS severity","points":0.0,"detail":"no CVSS"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]},"lineage":{"familyId":"fam-gnu-bourne-again-shell-bash-cve-2014-6271","parents":[{"from":"CVE-2014-6271","to":"CVE-2014-6277","relation":"incomplete-fix","confidence":"high","kind":"lineage","evidence":[{"kind":"text","provenance":"source","relation":"incomplete-fix","quote":"NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-6271 and CVE-2014-7169.","from":"CVE.org","in":"CVE-2014-6277"}]},{"from":"CVE-2014-7169","to":"CVE-2014-6277","relation":"incomplete-fix","confidence":"high","kind":"lineage","evidence":[{"kind":"text","provenance":"source","relation":"incomplete-fix","quote":"NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-6271 and CVE-2014-7169.","from":"CVE.org","in":"CVE-2014-6277"}]}],"children":[{"from":"CVE-2014-6277","to":"CVE-2014-6278","relation":"incomplete-fix","confidence":"high","kind":"lineage","evidence":[{"kind":"text","provenance":"source","relation":"incomplete-fix","quote":"NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-6271, CVE-2014-7169, and CVE-2014-6277.","from":"NVD","in":"CVE-2014-6278"}]}]}}