GNU · Bourne-Again Shell (Bash)
CVE-2014-7169
GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability
What it is
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.
CISA: 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.
What to do
Apply updates per vendor instructions.
Deadline for US federal agencies: July 28, 2022
- Added to the CISA list
- January 28, 2022
- Published
- September 25, 2014
- Severity
- Critical 9.8 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 99.9% in the top 0.1% of all known vulnerabilities
- Weakness
- CWE-78
- More details
- NVD · CVE.org · CISA
All references (20)
- http://marc.info/?l=bugtraq&m=141577137423233&w=2
- http://marc.info/?l=bugtraq&m=141216668515282&w=2
- http://marc.info/?l=bugtraq&m=141383138121313&w=2
- http://marc.info/?l=bugtraq&m=142721162228379&w=2
- http://marc.info/?l=bugtraq&m=142358026505815&w=2
- http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00038.html
- http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00044.html
- http://marc.info/?l=bugtraq&m=141383026420882&w=2
- http://packetstormsecurity.com/files/128517/VMware-Security-Advisory-2014-0010.html
- http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004897
- http://www-01.ibm.com/support/docview.wss?uid=swg21685749
- http://www.openwall.com/lists/oss-security/2014/09/24/32
- https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk1…
- http://www.securityfocus.com/archive/1/533593/100/0/threaded
- http://www-01.ibm.com/support/docview.wss?uid=swg21686084
- http://www-01.ibm.com/support/docview.wss?uid=swg21686479
- http://secunia.com/advisories/61188
- http://jvn.jp/en/jp/JVN55667175/index.html
- http://secunia.com/advisories/61676
- http://secunia.com/advisories/60433
More exploited flaws from GNU
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Jan 28, 2022 | Arbitrary Code Execution | Bourne-Again Shell (Bash) | Critical 9.8 | >99.9% |
| Jan 26, 2026 | Argument Injection | InetUtils | Critical 9.8 | 99% |
| Oct 2, 2025 | Bash OS Command Injection | GNU Bash | High 8.8 | 99.7% |
| Nov 21, 2023 | C Library Buffer Overflow | GNU C Library | High 7.8 | 64% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.