Critical severity · published Jul 1, 2021
CVE-2020-36400
ZeroMQ libzmq 4.3.3 has a heap-based buffer overflow in zmq::tcp_read, a different vulnerability than CVE-2021-20235
9.8
CVSS
1.8%
EPSS
No
On KEV
Description
ZeroMQ libzmq 4.3.3 has a heap-based buffer overflow in zmq::tcp_read, a different vulnerability than CVE-2021-20235.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.8% · higher than 79% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Libzmq · Zeromq
4.3.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36400
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-36400
Issue Tracking
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26042
Third Party Advisory
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libzmq/OSV-2020-1887.yaml
Patch
https://github.com/zeromq/libzmq/commit/397ac80850bf8d010fae23dd215db0ee2c677306
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