CVE-2014-6271
bash - security update
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 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, aka "ShellShock." NOTE: the original fix for this issue was incorrect; CVE-2014-7169 has been assigned to cover the vulnerability that is still present after the incorrect fix.
How to fix CVE-2014-6271
To remediate CVE-2014-6271, upgrade the affected package to a fixed version below.
- —upgrade to 4.3-9.1 or later
- —upgrade to 4.1-3+deb6u1 or later
- —upgrade to 4.2+dfsg-0.1+deb7u1 or later
Is CVE-2014-6271 being exploited?
Yes — CVE-2014-6271 is on the CISA Known Exploited Vulnerabilities (KEV) catalog. Patch immediately.
Affected packages (3)
- from 0, < 4.3-9.1
- from 0, < 4.1-3+deb6u1
- from 0, < 4.2+dfsg-0.1+deb7u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |