CVE-2020-36400

moderate-risk
Published 2021-07-01

ZeroMQ libzmq 4.3.3 has a heap-based buffer overflow in zmq::tcp_read, a different vulnerability than CVE-2021-20235.

Do I need to act?

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0.54% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
+
Fix available
Upgrade to: 397ac80850bf8d010fae23dd215db0ee2c677306
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Zeromq

References (6)

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.ya...
Patch https://github.com/zeromq/libzmq/commit/397ac80850bf8d010fae23dd215db0ee2c677306
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.ya...
Patch https://github.com/zeromq/libzmq/commit/397ac80850bf8d010fae23dd215db0ee2c677306
39
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 2/34 · Minimal
Exposure 5/34 · Minimal