CVE-2014-6271

critical-risk
Published 2014-09-24

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.

Do I need to act?

!
94.2% chance of exploitation in next 30 days
EPSS score — higher than 6% of all CVEs
!
CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
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21 public exploits available
38849, 34777, 39918 and 18 more
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (20)

Eos
Qts
Qts
Qts

Affected Vendors

F5 Vmware Gnu Suse Checkpoint Apple Opensuse Oracle Debian Arista Novell Canonical Redhat Citrix Ibm Mageia Qnap

References (341)

Third Party Advisory http://advisories.mageia.org/MGASA-2014-0388.html
Broken Link http://archives.neohapsis.com/archives/bugtraq/2014-10/0101.html
Vendor Advisory http://jvn.jp/en/jp/JVN55667175/index.html
Third Party Advisory http://jvndb.jvn.jp/jvndb/JVNDB-2014-000126
Third Party Advisory http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10673
Exploit http://lcamtuf.blogspot.com/2014/09/quick-notes-about-bash-bug-its-impact.html
Third Party Advisory http://linux.oracle.com/errata/ELSA-2014-1293.html
Third Party Advisory http://linux.oracle.com/errata/ELSA-2014-1294.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00028.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00029.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00034.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00037.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00040.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00044.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00049.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00004.html
Mailing List http://lists.opensuse.org/opensuse-updates/2014-10/msg00023.html
Mailing List http://lists.opensuse.org/opensuse-updates/2014-10/msg00025.html
Mailing List http://marc.info/?l=bugtraq&m=141216207813411&w=2
Mailing List http://marc.info/?l=bugtraq&m=141216668515282&w=2
and 321 more references
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99
/ 100
critical-risk
Severity 32/34 · Critical
Exploitability 34/34 · Critical
Exposure 33/34 · Critical