Vulnerability Description
transports/appendfile.c in Exim before 4.72, when a world-writable sticky-bit mail directory is used, does not verify the st_nlink field of mailbox files, which allows local users to cause a denial of service or possibly gain privileges by creating a hard link to another user's file.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Exim | Exim | <= 4.71 |
Related Weaknesses (CWE)
References
- http://archives.neohapsis.com/archives/fulldisclosure/2010-06/0079.html
- http://bugs.exim.org/show_bug.cgi?id=988
- http://lists.exim.org/lurker/message/20100524.175925.9a69f755.en.html
- http://lists.fedoraproject.org/pipermail/package-announce/2010-June/042587.html
- http://lists.fedoraproject.org/pipermail/package-announce/2010-June/042613.html
- http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html
- http://secunia.com/advisories/40019Vendor Advisory
- http://secunia.com/advisories/40123
- http://secunia.com/advisories/43243
- http://vcs.exim.org/viewvc/exim/exim-doc/doc-txt/ChangeLog?view=markup&pathrev=e
- http://vcs.exim.org/viewvc/exim/exim-src/src/transports/appendfile.c?r1=1.24&r2=Patch
- http://www.securityfocus.com/archive/1/511653/100/0/threaded
- http://www.securityfocus.com/bid/40451
- http://www.ubuntu.com/usn/USN-1060-1
- http://www.vupen.com/english/advisories/2010/1402
FAQ
What is CVE-2010-2023?
CVE-2010-2023 is a vulnerability with a CVSS score of 4.4 (MEDIUM). transports/appendfile.c in Exim before 4.72, when a world-writable sticky-bit mail directory is used, does not verify the st_nlink field of mailbox files, which allows local users to cause a denial of...
How severe is CVE-2010-2023?
CVE-2010-2023 has been rated MEDIUM with a CVSS base score of 4.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2010-2023?
Check the references section above for vendor advisories and patch information. Affected products include: Exim Exim.