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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.

•MISC: http://lcamtuf.blogspot.com/2014/09/quick-notes-about-bash-bug-its-impact.html
•CONFIRM: https://bugzilla.redhat.com/show\_bug.cgi?id=1141597
•CONFIRM: https://securityblog.redhat.com/2014/09/24/bash-specially-crafted-environment-variables-code-injection-attack/
•URL: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140926-bash
•URL: http://www.debian.org/security/2014/dsa-3032
•URL: http://rhn.redhat.com/errata/RHSA-2014-1293.html
•URL: http://rhn.redhat.com/errata/RHSA-2014-1294.html
•URL: http://rhn.redhat.com/errata/RHSA-2014-1295.html
•URL: http://www.ubuntu.com/usn/USN-2362-1
•URL: http://www.us-cert.gov/ncas/alerts/TA14-268A
•URL: http://www.kb.cert.org/vuls/id/252743

(from redmine: issue id 3402, created on 2014-09-30, closed on 2014-10-02)

• Relations:
  • relates #3407 (closed)
  • relates #3422 (closed)
  • child #3403 (closed)
  • child #3404 (closed)
  • child #3405 (closed)
  • child #3406 (closed)
• Changesets:
  • Revision f227eb4c by Natanael Copa on 2014-09-30T09:06:04Z:

main/bash: security upgrade to 4.3.27 (CVE-2014-7169)

ref #3402