CVE-2010-2024

CVE-2010-2024 is a medium-severity vulnerability in Exim with a CVSS 2.0 base score of 4.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-362.

Key facts

• Severity: Medium (CVSS 2.0 base score 4.4)
• EPSS exploit prediction: 0% (20th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-362
• Affected product: Exim
• Published: 2010-06-07
• Last modified: 2026-06-16

Description

transports/appendfile.c in Exim before 4.72, when MBX locking is enabled, allows local users to change permissions of arbitrary files or create arbitrary files, and cause a denial of service or possibly gain privileges, via a symlink attack on a lockfile in /tmp/.

Frequently asked questions

What is CVE-2010-2024?

transports/appendfile.c in Exim before 4.72, when MBX locking is enabled, allows local users to change permissions of arbitrary files or create arbitrary files, and cause a denial of service or possibly gain privileges, via a symlink attack on a lockfile in /tmp/.

How severe is CVE-2010-2024?

CVE-2010-2024 has a CVSS 2.0 base score of 4.4, rated medium severity.

Is CVE-2010-2024 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-2024?

CVE-2010-2024 primarily affects Exim. In total, 33 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-2024?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2010-2024 published?

CVE-2010-2024 was published on 2010-06-07 and last updated on 2026-06-16.

References

• http://archives.neohapsis.com/archives/fulldisclosure/2010-06/0079.html
• http://bugs.exim.org/show_bug.cgi?id=989
• 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/40019
• http://secunia.com/advisories/40123
• http://secunia.com/advisories/43243
• 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=1.25&r2=1.26
• http://www.securityfocus.com/archive/1/511653/100/0/threaded
• http://www.securityfocus.com/bid/40454
• 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://bugzilla.redhat.com/show_bug.cgi?id=600097
• https://exchange.xforce.ibmcloud.com/vulnerabilities/59042

Affected products (33)

• cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.10:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.20:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.21:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.22:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.23:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.24:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.30:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.31:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.32:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.33:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.34:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.40:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.41:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.42:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.43:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.44:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.50:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.51:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.52:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.53:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.54:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.60:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.61:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.62:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.63:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.64:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.65:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.66:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.67:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.68:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.69:*:*:*:*:*:*:*
• cpe:2.3:a:exim:exim:4.70:*:*:*:*:*:*:*

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