CVE-2020-12460

CRITICAL
9.8
CVSS Score
Published: July 27, 2020 at 10:52 PM UTC
Updated: June 17, 2026 at 02:51 AM UTC
3 products affected across 3 vendorsDebian LinuxFedoraOpenDMARC

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Severity
CRITICAL9.8
Exploit prediction
EPSS 4%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-787

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