CVE-2012-5671

EXPLOITED

Exim 4.70-4.80 - Remote Code Execution via DKIM DNS TXT Query Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2012-5671 has been observed exploited in the wild (reported by VulnCheck KEV).

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.

References (15)

Core 15
Core References
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/51115
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2012/10/26/5
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/51155
Various Sources mailing-list x_refsource_mlist
https://lists.exim.org/lurker/message/20121026.080330.74b9147b.en.html
Vendor Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-1618-1
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/51098
Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora
http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090900.html
Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora
http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090963.html
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/51153
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://osvdb.org/86616
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/56285
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/79615
Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora
http://lists.fedoraproject.org/pipermail/package-announce/2012-November/091664.html
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2012/dsa-2566

Scores

EPSS 0.0838
EPSS Percentile 94.3%

Details

VulnCheck KEV 2013-02-21
CWE
CWE-119
Status published
Products (9)
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
Published Oct 31, 2012
Tracked Since Feb 18, 2026