CVE-2012-5671
Heap-based buffer overflow in the dkim_exim_query_dns_txt function in dkim.c in Exim 4.70 through...
CVE-2012-5671 is a medium vulnerability (CVSS 6.8) in Exim, published October 26, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 8.38%, the 94th percentile. Fixed in exim4 4.80-5.1.
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2012-5671- CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2012-5671- Updated
- 2026-11-02
EUVDEUVD-2012-5554 No score
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.
- Record
EUVD-2012-5554- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-9mj7-g6p8-v73f No score
Heap-based buffer overflow in the dkim_exim_query_dns_txt function in dkim.c in Exim 4.70 through...
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.
- Record
GHSA-9mj7-g6p8-v73f- Weakness
- CWE-119
- Updated
- 2026-11-02
OSV No score
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.
- Record
CVE-2012-5671- Updated
- 2026-11-02
OSVDEBIAN-CVE-2012-5671 No score
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.
- Record
DEBIAN-CVE-2012-5671- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10017-1 No score
exim-4.86.2-2.2 on GA media
These are all security issues fixed in the exim-4.86.2-2.2 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10017-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
exim4Debian:12 |
before 4.80-5.1 | 4.80-5.1 |
exim4Debian:13 |
before 4.80-5.1 | 4.80-5.1 |
exim4Debian:14 |
before 4.80-5.1 | 4.80-5.1 |
exim4Debian:6.0 |
before 4.72-6+squeeze3, plus listed versions 4.72-64.72-6+squeeze14.72-6+squeeze1~bpo50+14.72-6+squeeze24.72-6+squeeze2~bpo50+1 |
4.72-6+squeeze3 |
eximopenSUSE:Tumbleweed |
before 4.86.2-2.2 | 4.86.2-2.2 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |
References
secunia.com/advisories/51115
openwall.com/lists/oss-security/2012/10/26/5
lists.exim.org/lurker/message/20121026.080330.74b9147b.en.html
ubuntu.com/usn/USN-1618-1
Show 23 moreShow less
lists.fedoraproject.org/pipermail/package-announce/2012-October/090900.html
osvdb.org/86616
lists.opensuse.org/opensuse-security-announce/2012-10/msg00018.html
securityfocus.com/bid/56285
exchange.xforce.ibmcloud.com/vulnerabilities/79615
debian.org/security/2012/dsa-2566
nvd.nist.gov/vuln/detail/CVE-2012-5671
github.com/advisories/GHSA-9mj7-g6p8-v73f
security-tracker.debian.org/tracker/CVE-2012-5671
suse.com/security/cve/CVE-2010-2023