Vulnerability CVE-2008-2936
Published: 2008-08-18   Modified: 2012-02-12

Description:
Postfix before 2.3.15, 2.4 before 2.4.8, 2.5 before 2.5.4, and 2.6 before 2.6-20080814, when the operating system supports hard links to symlinks, allows local users to append e-mail messages to a file to which a root-owned symlink points, by creating a hard link to this symlink and then sending a message. NOTE: this can be leveraged to gain privileges if there is a symlink to an init script.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
Postfix local privilege escalation via hardlinked symlinks
Wietse Venema
15.08.2008

Type:

CWE-264

 (Permissions, Privileges, and Access Controls)

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

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.2/10
10/10
1.9/10
Exploit range
Attack complexity
Authentication
Local
High
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Postfix -> Postfix 

 References:
ftp://ftp.porcupine.org/mirrors/postfix-release/experimental/postfix-2.6-20080814.HISTORY
ftp://ftp.porcupine.org/mirrors/postfix-release/official/postfix-2.3.15.HISTORY
ftp://ftp.porcupine.org/mirrors/postfix-release/official/postfix-2.4.8.HISTORY
ftp://ftp.porcupine.org/mirrors/postfix-release/official/postfix-2.5.4.HISTORY
http://article.gmane.org/gmane.mail.postfix.announce/110
http://lists.opensuse.org/opensuse-security-announce/2008-08/msg00002.html
http://security.gentoo.org/glsa/glsa-200808-12.xml
http://securityreason.com/securityalert/4160
http://wiki.rpath.com/Advisories:rPSA-2008-0259
http://www.debian.org/security/2008/dsa-1629
http://www.kb.cert.org/vuls/id/938323
http://www.mandriva.com/security/advisories?name=MDVSA-2008:171
http://www.redhat.com/support/errata/RHSA-2008-0839.html
http://www.securityfocus.com/archive/1/495474/100/0/threaded
http://www.securityfocus.com/archive/1/495632/100/0/threaded
http://www.securityfocus.com/archive/1/495882/100/0/threaded
http://www.securityfocus.com/bid/30691
http://www.securitytracker.com/id?1020700
http://www.vupen.com/english/advisories/2008/2385
https://exchange.xforce.ibmcloud.com/vulnerabilities/44460
https://issues.rpath.com/browse/RPL-2689
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10033
https://usn.ubuntu.com/636-1/
https://www.exploit-db.com/exploits/6337
https://www.redhat.com/archives/fedora-package-announce/2008-October/msg00271.html
https://www.redhat.com/archives/fedora-package-announce/2008-October/msg00287.html
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