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CVE
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CVE-2010-2023

Date: (C)2010-06-07   (M)2017-08-18
 
CVSS Score: 4.4Access Vector: LOCAL
Exploitability Subscore: 3.4Access Complexity: MEDIUM
Impact Subscore: 6.4Authentication: NONE
 Confidentiality: PARTIAL
 Integrity: PARTIAL
 Availability: PARTIAL











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.

Reference:
http://www.securityfocus.com/archive/1/archive/1/511653/100/0/threaded
SECUNIA-40019
SECUNIA-40123
BID-40451
SECUNIA-43243
ADV-2010-1402
ADV-2011-0364
FEDORA-2010-9506
FEDORA-2010-9524
SUSE-SR:2010:014
USN-1060-1
http://lists.exim.org/lurker/message/20100524.175925.9a69f755.en.html
exim-mail-directory-priv-escalation(59043)
http://bugs.exim.org/show_bug.cgi?id=988
http://vcs.exim.org/viewvc/exim/exim-doc/doc-txt/ChangeLog?view=markup&pathrev=exim-4_72_RC2
http://vcs.exim.org/viewvc/exim/exim-src/src/transports/appendfile.c?r1=1.24&r2=1.25
https://bugzilla.redhat.com/show_bug.cgi?id=600093

CPE    33
cpe:/a:exim:exim:4.53
cpe:/a:exim:exim:4.31
cpe:/a:exim:exim:4.10
cpe:/a:exim:exim:4.32
...
CWE    1
CWE-362
OVAL    6
oval:org.secpod.oval:def:102547
oval:org.secpod.oval:def:102660
oval:org.secpod.oval:def:100806
oval:org.secpod.oval:def:102658
...

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