{"cveID":"CVE-2014-6271","vendorProject":"GNU","product":"Bourne-Again Shell (Bash)","vulnerabilityName":"GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability","dateAdded":"2022-01-28","shortDescription":"GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute code.","requiredAction":"Apply updates per vendor instructions.","dueDate":"2022-07-28","knownRansomwareCampaignUse":"Unknown","notes":"https://nvd.nist.gov/vuln/detail/CVE-2014-6271","cwes":["CWE-78"],"year":2014,"state":"mapped","stale_reasons":[],"mappings":[{"domain":"enterprise","cve":"CVE-2014-6271","technique":"T1133","technique_name_at_mapping":"External Remote Services","mapping_type":"exploitation_technique","capability_group":"code_execution","comments":"CVE-2014-6271 allows environment variables set from service/HTTP requests on a serve (e.g. HTTP_COOKIE) in Bash shell that allows for spawning a child shell with the authority/privilege level of the parent shell to perform RCE of code provided by the adversary in the request. ","references":["https://lcamtuf.blogspot.com/2014/09/quick-notes-about-bash-bug-its-impact.html"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"},{"domain":"enterprise","cve":"CVE-2014-6271","technique":"T1190","technique_name_at_mapping":"Exploit Public-Facing Application","mapping_type":"exploitation_technique","capability_group":"code_execution","comments":"CVE-2014-6271 allows environment variables set from service/HTTP requests on a serve (e.g. HTTP_COOKIE) in Bash shell that allows for spawning a child shell with the authority/privilege level of the parent shell to perform RCE of code provided by the adversary in the request. ","references":["https://lcamtuf.blogspot.com/2014/09/quick-notes-about-bash-bug-its-impact.html"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"},{"domain":"enterprise","cve":"CVE-2014-6271","technique":"T1059.004","technique_name_at_mapping":"Unix Shell","mapping_type":"primary_impact","capability_group":"code_execution","comments":"CVE-2014-6271 allows environment variables set from service/HTTP requests on a serve (e.g. HTTP_COOKIE) in Bash shell that allows for spawning a child shell with the authority/privilege level of the parent shell to perform RCE of code provided by the adversary in the request. ","references":["https://lcamtuf.blogspot.com/2014/09/quick-notes-about-bash-bug-its-impact.html"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"}],"techniques":[{"id":"T1059.004","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Unix Shell","name_at_mapping":"Unix Shell","renamed":false,"revoked_by":null,"mapping_types":["primary_impact"],"sigma_rule_count":18,"has_detection_strategy":true},{"id":"T1133","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"External Remote Services","name_at_mapping":"External Remote Services","renamed":false,"revoked_by":null,"mapping_types":["exploitation_technique"],"sigma_rule_count":20,"has_detection_strategy":true},{"id":"T1190","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Exploit Public-Facing Application","name_at_mapping":"Exploit Public-Facing Application","renamed":false,"revoked_by":null,"mapping_types":["exploitation_technique"],"sigma_rule_count":149,"has_detection_strategy":true}],"mapping_types":["exploitation_technique","primary_impact"],"has_exploitation_technique":true,"mapping_attack_versions":["16.1"],"mapping_domains":["enterprise"],"sigma_coverage":"full","sigma_rules_tagged_cve":[],"added_after_mapping_snapshot":false,"_source":"kevmap","_built":"2026-08-23 05:47 UTC","_attack_version":"19.2"}