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01 Record

CVE-2014-6271

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

CriticalKEVPUBLISHEDCNA: debian
CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

02 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

03 Exploitation and scoring

Exploitation
Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2022-01-28. Federal remediation due 2022-07-28.
SSVC decision
  • ExploitationactiveCISA reports credible evidence of active exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
99.99% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 99.9% of scored records. A rank, not a probability.
NVD base score
9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Analyzed. NVD last modified this record on 2026-06-17.
Red Hat severity
Critical. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2014-09-24 18:00Z12 YR AGO
Last updated
2025-10-22 00:05Z1 YR AGO
Reserved
2014-09-09
Assigning CNA
debian
Record state
PUBLISHED
Severity
Critical (CVSS 9.8)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
  • CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')Base
Data version
5.1
Document digest
10368313161c8b5dcaaca40af14f8c1cff9b0656acd2cdb3fed040f223c3947d

05 Affected products

VendorProductVersionsPlatforms
applemac_os_xNot specified—
aristaeosNot specified—
canonicalubuntu_linuxNot specified—
checkpointsecurity_gatewayNot specified—
citrixnetscaler_sdxNot specified—
citrixnetscaler_sdx_firmwareNot specified—
debiandebian_linuxNot specified—
f5arxNot specified—
f5arx_firmwareNot specified—
f5big-ip_analyticsNot specified—
f5big-ip_edge_gatewayNot specified—
f5big-ip_link_controllerNot specified—
f5big-ip_webacceleratorNot specified—
f5big-iq_cloudNot specified—
f5big-iq_deviceNot specified—
f5big-iq_securityNot specified—
f5enterprise_managerNot specified—
gnubashNot specified—
ibmflex_system_v7000Not specified—
ibmflex_system_v7000_firmwareNot specified—
ibmpureapplication_systemNot specified—
ibmqradar_risk_managerNot specified—
ibmqradar_vulnerability_managerNot specified—
ibmsan_volume_controllerNot specified—
ibmsmartcloud_entry_applianceNot specified—
ibmsmartcloud_provisioningNot specified—
ibmstarter_kit_for_cloudNot specified—
ibmstn6500Not specified—
ibmstn6500_firmwareNot specified—
ibmstn6800Not specified—
ibmstn6800_firmwareNot specified—
ibmstn7800Not specified—
ibmstn7800_firmwareNot specified—
ibmstorwize_v3500Not specified—
ibmstorwize_v3500_firmwareNot specified—
ibmstorwize_v3700Not specified—
ibmstorwize_v3700_firmwareNot specified—
ibmstorwize_v5000Not specified—
ibmstorwize_v5000_firmwareNot specified—
ibmstorwize_v7000Not specified—
ibmstorwize_v7000_firmwareNot specified—
ibmworkload_deployerNot specified—
mageiamageiaNot specified—

30 further entries not shown. The complete list is in the raw JSON document.

06 References

07 Fixed in

Debian 12

  • bash
    Fixed in 4.3-9.1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • bash
    Fixed in 4.3-9.1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • bash
    Fixed in 4.3-9.1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 14.04 LTS

  • bash
    Fixed in 4.3-7ubuntu1.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.