Vulnerability CVE-2014-6277
Published: 2014-09-27   Modified: 2014-09-28

Description:
GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized memory access, and untrusted-pointer read and write operations) 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 and CVE-2014-7169.

See advisories in our WLB2 database:
Topic
Author
Date
High
Bash Me Some More
vixie
02.10.2014
Low
CA Technologies GNU Bash Shellshock
Ken Williams
07.10.2014

Type:

CWE-78

 (Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') )

CVSS2 => (AV:N/AC:L/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
10/10
10/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
GNU -> BASH 

 References:
http://jvn.jp/en/jp/JVN55667175/index.html
http://jvndb.jvn.jp/jvndb/JVNDB-2014-000126
http://lcamtuf.blogspot.com/2014/09/bash-bug-apply-unofficial-patch-now.html
http://lcamtuf.blogspot.com/2014/10/bash-bug-how-we-finally-cracked.html
http://linux.oracle.com/errata/ELSA-2014-3093
http://linux.oracle.com/errata/ELSA-2014-3094
http://lists.apple.com/archives/security-announce/2015/Jan/msg00003.html
http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html
http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00004.html
http://lists.opensuse.org/opensuse-updates/2014-10/msg00025.html
http://marc.info/?l=bugtraq&m=141330468527613&w=2
http://marc.info/?l=bugtraq&m=141345648114150&w=2
http://marc.info/?l=bugtraq&m=141383026420882&w=2
http://marc.info/?l=bugtraq&m=141383081521087&w=2
http://marc.info/?l=bugtraq&m=141383196021590&w=2
http://marc.info/?l=bugtraq&m=141383244821813&w=2
http://marc.info/?l=bugtraq&m=141383304022067&w=2
http://marc.info/?l=bugtraq&m=141383353622268&w=2
http://marc.info/?l=bugtraq&m=141383465822787&w=2
http://marc.info/?l=bugtraq&m=141450491804793&w=2
http://marc.info/?l=bugtraq&m=141576728022234&w=2
http://marc.info/?l=bugtraq&m=141577137423233&w=2
http://marc.info/?l=bugtraq&m=141577241923505&w=2
http://marc.info/?l=bugtraq&m=141577297623641&w=2
http://marc.info/?l=bugtraq&m=141585637922673&w=2
http://marc.info/?l=bugtraq&m=141879528318582&w=2
http://marc.info/?l=bugtraq&m=142118135300698&w=2
http://marc.info/?l=bugtraq&m=142289270617409&w=2
http://marc.info/?l=bugtraq&m=142358026505815&w=2
http://marc.info/?l=bugtraq&m=142358078406056&w=2
http://marc.info/?l=bugtraq&m=142721162228379&w=2
http://packetstormsecurity.com/files/128567/CA-Technologies-GNU-Bash-Shellshock.html
http://support.apple.com/HT204244
http://support.novell.com/security/cve/CVE-2014-6277.html
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140926-bash
http://www-01.ibm.com/support/docview.wss?uid=isg3T1021272
http://www-01.ibm.com/support/docview.wss?uid=isg3T1021279
http://www-01.ibm.com/support/docview.wss?uid=isg3T1021361
http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004879
http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004897
http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004898
http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004915
http://www-01.ibm.com/support/docview.wss?uid=swg21685541
http://www-01.ibm.com/support/docview.wss?uid=swg21685604
http://www-01.ibm.com/support/docview.wss?uid=swg21685733
http://www-01.ibm.com/support/docview.wss?uid=swg21685749
http://www-01.ibm.com/support/docview.wss?uid=swg21685914
http://www-01.ibm.com/support/docview.wss?uid=swg21686131
http://www-01.ibm.com/support/docview.wss?uid=swg21686246
http://www-01.ibm.com/support/docview.wss?uid=swg21686445
http://www-01.ibm.com/support/docview.wss?uid=swg21686479
http://www-01.ibm.com/support/docview.wss?uid=swg21686494
http://www-01.ibm.com/support/docview.wss?uid=swg21687079
http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5096315
http://www.mandriva.com/security/advisories?name=MDVSA-2015:164
http://www.novell.com/support/kb/doc.php?id=7015721
http://www.oracle.com/technetwork/topics/security/bashcve-2014-7169-2317675.html
http://www.qnap.com/i/en/support/con_show.php?cid=61
http://www.ubuntu.com/usn/USN-2380-1
http://www.vmware.com/security/advisories/VMSA-2014-0010.html
https://kb.bluecoat.com/index?page=content&id=SA82
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10648
https://kc.mcafee.com/corporate/index?page=content&id=SB10085
https://support.apple.com/HT205267
https://support.citrix.com/article/CTX200217
https://support.citrix.com/article/CTX200223
https://support.f5.com/kb/en-us/solutions/public/15000/600/sol15629.html
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-c04497075
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-c04518183
https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk102673&src=securityAlerts
https://www.suse.com/support/shellshock/
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