THREATPORT/VULNERABILITY/CVE-2012-5671
MEDIUM SEVERITY

CVE-2012-5671

Exim vulnerability

CVSS
6.8
EPSS
8.4%
EPSS pct
94th
Exploited
No known
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.
Affected vendor
Exim
Affected product
Exim
CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness type (CWE)
  • CWE-119 — Improper Restriction of Operations within Memory Bounds
Published
2012-10-31

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring no authentication. Successful exploitation leads to partial impact to confidentiality, partial impact to integrity, partial impact to availability.

Its EPSS score of 8.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 94% of all scored CVEs.

Check your external exposure to CVE-2012-5671

  • Confirm whether Exim Exim is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2012-5671.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2012-5671

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2012-5671 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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