CVE-2010-2023

Exim < 4.72 - Denial of Service via Hard Link Attack in Mail Directory

Title source: llm
STIX 2.1

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.

References (18)

Core 18
Core References
Third Party Advisory mailing-list x_refsource_fulldisc
http://archives.neohapsis.com/archives/fulldisclosure/2010-06/0079.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/40451
Third Party Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2010/1402
Third Party Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2011/0364
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/43243
Various Sources x_refsource_confirm
http://bugs.exim.org/show_bug.cgi?id=988
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/40019
Various Sources mailing-list x_refsource_mlist
http://lists.exim.org/lurker/message/20100524.175925.9a69f755.en.html
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/40123
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/511653/100/0/threaded
Issue Tracking x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=600093
Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora
http://lists.fedoraproject.org/pipermail/package-announce/2010-June/042613.html
Vendor Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-1060-1
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/59043
Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora
http://lists.fedoraproject.org/pipermail/package-announce/2010-June/042587.html

Scores

EPSS 0.0028
EPSS Percentile 19.7%

Details

CWE
CWE-362
Status published
Products (33)
exim/exim 4.10
exim/exim 4.20
exim/exim 4.21
exim/exim 4.22
exim/exim 4.23
exim/exim 4.24
exim/exim 4.30
exim/exim 4.31
exim/exim 4.32
exim/exim 4.33
... and 23 more
Published Jun 07, 2010
Tracked Since Feb 18, 2026