CVE-2012-5671

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 8.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-10-31 · updated 2026-06-16
Weakness: CWE-119

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.

Affected products

Exim: 4.70, 4.71, 4.72, 4.73, 4.74, 4.75 (+3)

References

http://lists.fedoraproject.org/pipermail/package-announce/2012-November/091664.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090900.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090963.html
http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00018.html
http://osvdb.org/86616
http://secunia.com/advisories/51098
http://secunia.com/advisories/51115
http://secunia.com/advisories/51153
http://secunia.com/advisories/51155
http://www.debian.org/security/2012/dsa-2566
http://www.openwall.com/lists/oss-security/2012/10/26/5
http://www.securityfocus.com/bid/56285

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