CVE-2010-2023

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.

Category

4.4
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.07%
Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory secunia.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://archives.neohapsis.com/archives/fulldisclosure/2010-06/0079.html mailing list
http://www.securityfocus.com/bid/40451 vdb entry
http://www.vupen.com/english/advisories/2010/1402 vdb entry
http://www.vupen.com/english/advisories/2011/0364 vdb entry
http://secunia.com/advisories/43243 third party advisory
http://bugs.exim.org/show_bug.cgi?id=988
http://vcs.exim.org/viewvc/exim/exim-src/src/transports/appendfile.c?r1=1.24&r2=1.25 patch
http://secunia.com/advisories/40019 third party advisory vendor advisory
http://lists.exim.org/lurker/message/20100524.175925.9a69f755.en.html mailing list
http://vcs.exim.org/viewvc/exim/exim-doc/doc-txt/ChangeLog?view=markup&pathrev=exim-4_72_RC2
http://secunia.com/advisories/40123 third party advisory
http://www.securityfocus.com/archive/1/511653/100/0/threaded mailing list
https://bugzilla.redhat.com/show_bug.cgi?id=600093
http://lists.fedoraproject.org/pipermail/package-announce/2010-June/042613.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html vendor advisory
http://www.ubuntu.com/usn/USN-1060-1 vendor advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/59043 vdb entry
http://lists.fedoraproject.org/pipermail/package-announce/2010-June/042587.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2010-2023?
CVE-2010-2023 has been scored as a medium severity vulnerability.
How to fix CVE-2010-2023?
To fix CVE-2010-2023, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2010-2023 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2010-2023 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.