Shellshock — Apple Mac OS X RCE
CVE-2014-6271
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 1.000 (100.0th percentile), scored .
Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 100.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
- Apple Mac OS X
- Arista Eos
- Checkpoint Security Gateway
- Citrix Netscaler Sdx
- Citrix Netscaler Sdx Firmware
- F5 Arx
- F5 Arx Firmware
- F5 Big-Ip Access Policy Manager — versions 11.6.0
- F5 Big-Ip Advanced Firewall Manager — versions 11.6.0
- F5 Big-Ip Analytics — versions 11.6.0
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- www.exploit-db.com/exploits/37816/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- packetstormsecurity.com/files/128517/VMware-Security-Advisory-2014-0010.html (Exploit, VDB Entry, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2014-09/msg00034.html (vendor-advisory, Mailing List, Third Party Advisory)
- www-01.ibm.com/support/docview.wss (Third Party Advisory)
- www-01.ibm.com/support/docview.wss (Third Party Advisory)
- marc.info/ (vendor-advisory, Mailing List, Third Party Advisory)
- marc.info/ (vendor-advisory, Mailing List, Third Party Advisory)
- www.exploit-db.com/exploits/39918/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- marc.info/ (vendor-advisory, Mailing List, Third Party Advisory)
- rhn.redhat.com/errata/RHSA-2014-1295.html (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2014-6271?
- CVE-2014-6271 is a critical-severity vulnerability in Apple Mac OS X, classified under OS Command Injection. CVSS score: 9.8/10. Published 2014-09-24.
- How severe is CVE-2014-6271?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2014-6271 known to be exploited?
- Yes. CVE-2014-6271 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-01-28), indicating it is being actively exploited. 847 public proof-of-concept repositories are indexed.