GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed function definitions in the values of environment variabl
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
GNU Bash through version 4.3 is affected, and it can be triggered through software that passes environment variables across a privilege boundary, such as OpenSSH's ForceCommand feature, Apache HTTP Server's mod_cgi and mod_cgid modules, and DHCP client scripts. A remote attacker could use a specially crafted environment to write to files or potentially cause other unspecified effects.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed function definitions in the values of environment variables, which allows remote attackers to write to files or possibly have unknown other impact 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.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- n/a n/a
Version range not reported
References 25
packetstormsecurity.com
www-01.ibm.com
openwall.com
marc.info
- marc.info?l=bugtraq&m=141577137423233&w=2
- marc.info?l=bugtraq&m=141216668515282&w=2
- marc.info?l=bugtraq&m=141383138121313&w=2
- marc.info?l=bugtraq&m=142721162228379&w=2
- marc.info?l=bugtraq&m=142358026505815&w=2
- marc.info?l=bugtraq&m=141383026420882&w=2
- marc.info?l=bugtraq&m=141585637922673&w=2
- marc.info?l=bugtraq&m=141576728022234&w=2