Race Condition Affecting exim4 package, versions <4.72-1
Snyk CVSS
Attack Complexity
Low
User Interaction
Required
Threat Intelligence
EPSS
0.04% (10th
percentile)
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Test your applications- Snyk ID SNYK-DEBIANUNSTABLE-EXIM4-382954
- published 7 Jun 2010
- disclosed 7 Jun 2010
Introduced: 7 Jun 2010
CVE-2010-2023 Open this link in a new tabHow to fix?
Upgrade Debian:unstable
exim4
to version 4.72-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream exim4
package and not the exim4
package as distributed by Debian
.
See How to fix?
for Debian:unstable
relevant fixed versions and status.
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
- https://security-tracker.debian.org/tracker/CVE-2010-2023
- http://www.securityfocus.com/archive/1/511653/100/0/threaded
- 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
- http://lists.fedoraproject.org/pipermail/package-announce/2010-June/042587.html
- http://lists.fedoraproject.org/pipermail/package-announce/2010-June/042613.html
- http://archives.neohapsis.com/archives/fulldisclosure/2010-06/0079.html
- http://lists.exim.org/lurker/message/20100524.175925.9a69f755.en.html
- http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html
- https://bugzilla.redhat.com/show_bug.cgi?id=600093
- http://secunia.com/advisories/40019
- http://secunia.com/advisories/40123
- http://secunia.com/advisories/43243
- http://www.securityfocus.com/bid/40451
- http://www.ubuntu.com/usn/USN-1060-1
- http://www.vupen.com/english/advisories/2010/1402
- http://www.vupen.com/english/advisories/2011/0364
- https://exchange.xforce.ibmcloud.com/vulnerabilities/59043