What’s Vulnerable › Vulnerabilities

CVE-2019-20791

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-04-28 · updated 2026-06-17
• Weakness: CWE-787

Description

OpenThread before 2019-12-13 has a stack-based buffer overflow in MeshCoP::Commissioner::GeneratePskc.

Affected products

• Google Openthread: before 2019-12-13 — fixed in 2019-12-13

How to fix

Upgrade to a fixed version: Google Openthread 2019-12-13. Check the vendor advisory for mitigations.

References

• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19386
• https://github.com/openthread/openthread/commit/b8c3161281f8e15873f8decabd8eac461717aefe
• https://github.com/openthread/openthread/commit/c3a3a0c424322009fec3ab735fb20ce8f6e19e70
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19386
• https://github.com/openthread/openthread/commit/b8c3161281f8e15873f8decabd8eac461717aefe
• https://github.com/openthread/openthread/commit/c3a3a0c424322009fec3ab735fb20ce8f6e19e70

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