UNIX Hard Link in Postfix - CVE-2008-2936
Published: June 8, 2025 / Updated: June 11, 2025
Vulnerability identifier: #VU110627
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2008-2936
CWE-ID: CWE-62
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to an error when following hard links. A local user can append e-mail messages to a file to which a root-owned symlink points, by creating a hard link to this symlink and then send the message.
Affected software
Postfix
Gentoo Linux
mail-mta/postfix
Gentoo Linux
mail-mta/postfix
How to mitigate CVE-2008-2936
Install updates from vendor's website.
Postfix - addressed in versions 2.3.15, 2.4.8, 2.5.4
mail-mta/postfix - update to 2.5.3-r1
mail-mta/postfix - update to 2.5.3-r1
Links to Public Exploits and PoC-codes
External 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://lists.opensuse.org/opensuse-security-announce/2008-08/msg00002.html
- http://www.securityfocus.com/bid/30691
- http://secunia.com/advisories/31485
- http://secunia.com/advisories/31500
- http://www.kb.cert.org/vuls/id/938323
- http://www.securitytracker.com/id?1020700
- http://security.gentoo.org/glsa/glsa-200808-12.xml
- http://secunia.com/advisories/31469
- http://www.redhat.com/support/errata/RHSA-2008-0839.html
- http://article.gmane.org/gmane.mail.postfix.announce/110
- http://secunia.com/advisories/31477
- http://www.mandriva.com/security/advisories?name=MDVSA-2008:171
- http://www.debian.org/security/2008/dsa-1629
- http://secunia.com/advisories/31530
- http://secunia.com/advisories/31474
- https://issues.rpath.com/browse/RPL-2689
- http://wiki.rpath.com/Advisories:rPSA-2008-0259
- http://securityreason.com/securityalert/4160
- http://secunia.com/advisories/32231
- https://www.redhat.com/archives/fedora-package-announce/2008-October/msg00287.html
- https://www.redhat.com/archives/fedora-package-announce/2008-October/msg00271.html
- http://www.vupen.com/english/advisories/2008/2385
- https://exchange.xforce.ibmcloud.com/vulnerabilities/44460
- https://www.exploit-db.com/exploits/6337
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10033
- https://usn.ubuntu.com/636-1/
- http://www.securityfocus.com/archive/1/495882/100/0/threaded
- http://www.securityfocus.com/archive/1/495632/100/0/threaded
- http://www.securityfocus.com/archive/1/495474/100/0/threaded