All vulnerabilities
CVE-2014-6271

GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability

GNU Bourne-Again Shell (Bash)
Open in ThreatlineRecord JSON
CVSS
9.8Critical
ExploitationExploited in the wildAdded to KEV 28 Jan 2022CISA KEV
Exploit odds (EPSS)>99.9%Chance of exploitation activity in the next 30 days, higher than 99.9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline28 Jul 2022Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 24 Sep 2014Exploit code publicMetasploit
  2. 24 Sep 2014, 18:00 UTCPublishedCVE List
  3. 28 Jan 2022Added to CISA KEVCISA KEV

Public exploit code and templates 12

  • Exploit moduleAdvantech Switch Bash Environment Variable Code Injection (Shellshock) 1 Dec 2015Metasploit
  • Exploit moduleApache mod_cgi Bash Environment Variable Code Injection (Shellshock) 24 Sep 2014Metasploit
  • Auxiliary moduleApache mod_cgi Bash Environment Variable Injection (Shellshock) Scanner 24 Sep 2014Metasploit
  • Exploit moduleCUPS Filter Bash Environment Variable Code Injection (Shellshock) 24 Sep 2014Metasploit
  • Auxiliary moduleDHCP Client Bash Environment Variable Code Injection (Shellshock) 24 Sep 2014Metasploit
  • Exploit moduleDhclient Bash Environment Variable Injection (Shellshock) 24 Sep 2014Metasploit
  • Exploit moduleIPFire Bash Environment Variable Injection (Shellshock) 29 Sep 2014Metasploit
  • Exploit moduleOS X VMWare Fusion Privilege Escalation via Bash Environment Code Injection (Shellshock) 24 Sep 2014Metasploit
  • Exploit modulePure-FTPd External Authentication Bash Environment Variable Code Injection (Shellshock) 24 Sep 2014Metasploit
  • Exploit moduleQmail SMTP Bash Environment Variable Injection (Shellshock) 24 Sep 2014Metasploit
  • Remote exploitAdvantech Switch - 'Shellshock' Bash Environment Variable Command Injection (Metasploit) 2 Dec 2015Exploit-DB
  • Remote exploitApache mod_cgi - 'Shellshock' Remote Command Injection 6 Oct 2014Exploit-DB

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute code.

Text from CVE List

Affected versions 1

  • n/aaffected: n/aCVE List

References 12