CVSS v3
9.8
CRITICAL
EPSS Score
14.6%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
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.
Active exploitation of CVE-2020-12460 has not been confirmed. The EPSS score is 14.6%, indicating the estimated probability of exploitation in the next 30 days.
CVE-2020-12460 has a CVSS v3 base score of 9.8 (CRITICAL severity).
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Ranked by exploit probability (EPSS).