CVE-2012-5671

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    CVE-2012-5671

    Published: 31 Oct 2012Last Modified: 10 Apr 2026

    Summary:

    Details: 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: 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.ubuntu.com/usn/USN-1618-1, 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://www.openwall.com/lists/oss-security/2012/10/26/5, http://www.securityfocus.com/bid/56285, https://exchange.xforce.ibmcloud.com/vulnerabilities/79615, https://lists.exim.org/lurker/message/20121026.080330.74b9147b.en.html

    Affected packages

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2012-5671 | CVE-DB