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Vulnerability Details : CVE-2012-5671

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.
Publish Date : 2012-10-31 Last Update Date : 2017-08-29
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute CodeOverflow
CWE ID 119

- Related OVAL Definitions

Title Definition Id Class Family
DSA-2566-1 exim4 - heap overflow oval:org.mitre.oval:def:19926 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2012-5671

# Product Type Vendor Product Version Update Edition Language
1 Application Exim Exim 4.70 * * * Version Details Vulnerabilities
2 Application Exim Exim 4.71 * * * Version Details Vulnerabilities
3 Application Exim Exim 4.72 * * * Version Details Vulnerabilities
4 Application Exim Exim 4.73 * * * Version Details Vulnerabilities
5 Application Exim Exim 4.74 * * * Version Details Vulnerabilities
6 Application Exim Exim 4.75 * * * Version Details Vulnerabilities
7 Application Exim Exim 4.76 * * * Version Details Vulnerabilities
8 Application Exim Exim 4.77 * * * Version Details Vulnerabilities
9 Application Exim Exim 4.80 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Exim Exim 9

- References For CVE-2012-5671
FEDORA FEDORA-2012-16899
FEDORA FEDORA-2012-17044
BID 56285 Exim DKIM DNS Decoding CVE-2012-5671 Remote Buffer Overflow Vulnerability Release Date:2012-11-19
OSVDB 86616
MLIST [exim-announce] 20121026 Exim 4.80.1 Security Release
SUSE openSUSE-SU-2012:1404
MLIST [oss-security] 20121027 CVE-2012-5671: Exim <= 4.80 DKIM heap-based buffer overflow
FEDORA FEDORA-2012-17085
XF exim-dkimeximquerydnstxt-bo(79615)

- Metasploit Modules Related To CVE-2012-5671

There are not any metasploit modules related to this CVE entry (Please visit for more information)

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