CVE-2019-20791 : OpenThread before 2019-12-13 has a stack-based buffer overflow in MeshCoP::Commi

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

Published 2020-04-28 18:15:13

Updated 2020-05-01 20:22:06

Source MITRE

View at NVD, CVE.org

Vulnerability category: OverflowMemory Corruption

Products affected by CVE-2019-20791

Google » Openthread
Versions before (<) 2019-12-13
cpe:2.3:o:google:openthread:*:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.23%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 60 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.5	HIGH	AV:N/AC:L/Au:N/C:P/I:P/A:P	10.0	6.4	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Assigned by: nvd@nist.gov (Primary)

https://github.com/openthread/openthread/commit/b8c3161281f8e15873f8decabd8eac461717aefe

[commissioner] add network name length check in GeneratePskc() (#4404) · openthread/openthread@b8c3161 · GitHub
Patch;Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19386

19386 - openthread:ncp-uart-received-fuzzer: Stack-buffer-overflow in ot::MeshCoP::Commissioner::GeneratePskc
Exploit;Mailing List;Third Party Advisory
https://github.com/openthread/openthread/commit/c3a3a0c424322009fec3ab735fb20ce8f6e19e70

[commissioner] use strnlen instead of strlen (#4404) · openthread/openthread@c3a3a0c · GitHub
Patch;Third Party Advisory

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