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    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.

    Published:Oct 26, 2012
    Last Modified:Apr 11, 2025
    EPS:Oct 31, 2012
    EPSS Score:0.10914
    CVSS Score:6.8

    Affected Products

    Vendor
    Exim
    Product
    Exim

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-66141 (CVSS 7.4) — Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandl…
    CVE-2026-66140 (CVSS 8.4) — Exim before 4.99.5 allows directory traversal to access files outside of the spool area, and consequently gain…
    CVE-2026-48840 (CVSS 5.3) — Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosur…
    CVE-2026-45185 (CVSS 9.8) — Exim before 4.99.3, in certain GnuTLS configurations, has a remotely reachable use-after-free in the BDAT body…
    CVE-2026-40686 (CVSS 3.7) — In Exim before 4.99.2, when utf8 operators are enabled, there is an out-of-bounds read if large UTF-8 trailing…
    CVE-2026-40684 (CVSS 5.9) — In Exim before 4.99.2, on systems using musl libc (not glibc), an attacker can crash the connection instance w…
    CVE-2026-40687 (CVSS 4.8) — In Exim before 4.99.2, when the SPA authentication driver is used with an adversarial SPA resource, there can …
    CVE-2026-40685 (CVSS 6.5) — In Exim before 4.99.2, when JSON lookup is enabled, an out-of-bounds heap write can occur when a JSON operator…
    CVE-2025-67896 (CVSS 7) — Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer over…
    CVE-2025-53881 (CVSS 6.9) — A UNIX Symbolic Link (Symlink) Following vulnerability in logrotate config in the exim package allowed privile…

    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
    http://www.ubuntu.com/usn/USN-1618-1
    https://exchange.xforce.ibmcloud.com/vulnerabilities/79615
    https://lists.exim.org/lurker/message/20121026.080330.74b9147b.en.html
    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
    http://www.ubuntu.com/usn/USN-1618-1
    https://exchange.xforce.ibmcloud.com/vulnerabilities/79615
    https://lists.exim.org/lurker/message/20121026.080330.74b9147b.en.html

    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