CVE-2014-7169
GNU Bourne-Again Shell (Bash): Arbitrary Code Execution
As of , CVE-2014-7169 in GNU Bourne-Again Shell (Bash) is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.
- Exploited
- Yes: CISA listed it on 28 January 2022
- US federal deadline
- 28 July 2022181 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Not known to CISA
- EPSS score
- 0.99Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- Not availableCISA listed it before 4 February 2022, where the EPSS files we read begin.
- Public exploit
- 15 Exploit-DB entries (9 verified)
- Fix
- No vendor link in CISA's entry
What CISA says to do
Apply updates per vendor instructions.
CISA's required action
What the flaw is
GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute code. This CVE correctly remediates the vulnerability in CVE-2014-6271.
CISA's 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.
The CVE record's description, from mitre
- CVE published
- 25 September 2014
- Assigned by
- mitre
- CVSS
- 9.8 Critical (CVSS 3.1, from CISA-ADP)
- CWE-78
- Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- yes
- CISA SSVC, technical impact
- total
Timeline
- The CVE record was published.
- Exploit-DB published an exploit (EDB-ID 34765).
- Exploit-DB published an exploit (EDB-ID 34766).
- Exploit-DB published an exploit (EDB-ID 34777).
- Exploit-DB published an exploit (EDB-ID 36933).
- Exploit-DB published an exploit (EDB-ID 34839).
- Exploit-DB published an exploit (EDB-ID 34860).
- Exploit-DB published an exploit (EDB-ID 34862).
- Exploit-DB published an exploit (EDB-ID 34879).
- Exploit-DB published an exploit (EDB-ID 34895).
- Exploit-DB published an exploit (EDB-ID 34896).
- Exploit-DB published an exploit (EDB-ID 35115).
- Exploit-DB published an exploit (EDB-ID 35146).
- Exploit-DB published an exploit (EDB-ID 36503).
- Exploit-DB published an exploit (EDB-ID 36504).
- Exploit-DB published an exploit (EDB-ID 36609).
- CISA added it to its list of exploited vulnerabilities.
- The US federal deadline to fix it.
Public exploits
Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.
- Exploit-DB: CUPS Filter - Bash Environment Variable Code Injection (Metasploit)EDB-ID 35115, verified by Exploit-DB, 29 October 2014
- Exploit-DB: Bash CGI - 'Shellshock' Remote Command Injection (Metasploit)EDB-ID 34895, verified by Exploit-DB, 6 October 2014
- Exploit-DB: Postfix SMTP 4.2.x < 4.2.48 - 'Shellshock' Remote Command InjectionEDB-ID 34896, verified by Exploit-DB, 6 October 2014
- Exploit-DB: Pure-FTPd - External Authentication Bash Environment Variable Code Injection (Metasploit)EDB-ID 34862, verified by Exploit-DB, 2 October 2014
- Exploit-DB: IPFire - CGI Web Interface (Authenticated) Bash Environment Variable Code InjectionEDB-ID 34839, verified by Exploit-DB, 1 October 2014
- Exploit-DB: dhclient 4.1 - Bash Environment Variable Command Injection (Shellshock)EDB-ID 36933, verified by Exploit-DB, 29 September 2014
- Exploit-DB: GNU Bash - 'Shellshock' Environment Variable Command InjectionEDB-ID 34765, verified by Exploit-DB, 25 September 2014
- Exploit-DB: Bash - 'Shellshock' Environment Variables Command InjectionEDB-ID 34766, verified by Exploit-DB, 25 September 2014
- Exploit-DB: GNU Bash - Environment Variable Command Injection (Metasploit)EDB-ID 34777, verified by Exploit-DB, 25 September 2014
- Exploit-DB: Kemp Load Master 7.1.16 - Multiple VulnerabilitiesEDB-ID 36609, 2 April 2015
- Exploit-DB: QNAP - Admin Shell via Bash Environment Variable Code Injection (Metasploit)EDB-ID 36503, 26 March 2015
- Exploit-DB: QNAP - Web Server Remote Code Execution via Bash Environment Variable Code Injection (Metasploit)EDB-ID 36504, 26 March 2015
- Exploit-DB: PHP < 5.6.2 - 'Shellshock' Safe Mode / disable_functions Bypass / Command InjectionEDB-ID 35146, 3 November 2014
- Exploit-DB: OpenVPN 2.2.29 - 'Shellshock' Remote Command InjectionEDB-ID 34879, 4 October 2014
- Exploit-DB: GNU bash 4.3.11 - Environment Variable dhclientEDB-ID 34860, 2 October 2014
Bourne-Again Shell (Bash): other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2014-6271Arbitrary Code Execution | GNU Bourne-Again Shell (Bash) | Patch this weekMetasploit module; EPSS 0.99; verified Exploit-DB entry | 0.99 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org