# CVE-2014-6277: CVE-2014-6277

- Exploited (CISA KEV): no
- Published: 2014-09-27
- CVSS: not scored
- EPSS: 64.3% (99th percentile)

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.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Before feed history | — | — |
| AWS | Before feed history | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | Before feed history | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2023-08-08 | — |
| Akamai | No public source | — | — |
| OWASP CRS | Before feed history | — | — |

### F5

- 2023-08-08 · updated · rule 200003927
  > Updated: signature 200003927 "Bash Shellshock execution attempt (2)" (Command Execution, risk High), systems: Unix/Linux. References: CVE-2014-6271, CVE-2014-7169, CVE-2014-6277, CVE-2014-6278.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2023-09-12 · updated · rule 200003927
  > Updated: signature 200003927 "Bash Shellshock execution attempt (2)" (Command Execution, risk High), systems: Unix/Linux. References: CVE-2014-6271, CVE-2014-7169, CVE-2014-6277, CVE-2014-6278.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2014-6277 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2014-6277