THREATPORT/VULNERABILITY/CVE-2020-12460
CRITICAL SEVERITY

CVE-2020-12460

Opendmarc vulnerability

CVSS
9.8
EPSS
3.7%
EPSS pct
89th
Exploited
No known
OpenDMARC through 1.3.2 and 1.4.x through 1.4.0-Beta1 has improper null termination in the function opendmarc_xml_parse that can result in a one-byte heap overflow in opendmarc_xml when parsing a specially crafted DMARC aggregate report. This can cause remote memory corruption when a '\0' byte overwrites the heap metadata of the next chunk and its PREV_INUSE flag.
Affected vendor
Trusteddomain
Affected product
Opendmarc
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
Published
2020-07-27

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.7% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 89% of all scored CVEs.

Check your external exposure to CVE-2020-12460

  • Confirm whether Trusteddomain Opendmarc is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2020-12460.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2020-12460

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2020-12460 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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