CVE-2012-5671

Name: CVE-2012-5671
Creator: NVD / NIST
Published: 2012-10-31T16:55:06.577+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 8.38%

Last modified Jun 16, 2026

CVE-2012-5671 is a vulnerability of currently unknown severity. Heap-based buffer overflow in the dkim_exim_query_dns_txt function in dkim.c in Exim 4.70 through 4.80, when DKIM support is enabled and acl_smtp_connect and acl_smtp_rcpt are not set to "warn control = dkim_disable_verify," allows remote attackers to execute arbitrary code via an email from a malicious DNS server.. EPSS estimates a 8.38% chance of exploitation in the next 30 days.

Description

Heap-based buffer overflow in the dkim_exim_query_dns_txt function in dkim.c in Exim 4.70 through 4.80, when DKIM support is enabled and acl_smtp_connect and acl_smtp_rcpt are not set to "warn control = dkim_disable_verify," allows remote attackers to execute arbitrary code via an email from a malicious DNS server.

Metrics

EPSS Probability

8.38%

94.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Exim	Exim	4.70
Exim	Exim	4.71
Exim	Exim	4.72
Exim	Exim	4.73
Exim	Exim	4.74
Exim	Exim	4.75
Exim	Exim	4.76
Exim	Exim	4.77
Exim	Exim	4.80

References

Timeline

Published: Oct 31, 2012
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2012-5671?

How severe is CVE-2012-5671?

Severity scoring for CVE-2012-5671 is pending analysis. The EPSS model estimates a 8.38% probability of exploitation in the next 30 days.

How do I fix CVE-2012-5671?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2012-5671?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST