Vulnerability Details CVE-2020-5235
There is a potentially exploitable out of memory condition In Nanopb before 0.4.1, 0.3.9.5, and 0.2.9.4. When nanopb is compiled with PB_ENABLE_MALLOC, the message to be decoded contains a repeated string, bytes or message field and realloc() runs out of memory when expanding the array nanopb can end up calling `free()` on a pointer value that comes from uninitialized memory. Depending on platform this can result in a crash or further memory corruption, which may be exploitable in some cases. This problem is fixed in nanopb-0.4.1, nanopb-0.3.9.5, nanopb-0.2.9.4.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.006
EPSS Ranking 67.2%
CVSS Severity
CVSS v3 Score 6.5
CVSS v2 Score 7.5
References
- https://github.com/nanopb/nanopb/commit/45582f1f97f49e2abfdba1463d1e1027682d9856
- https://github.com/nanopb/nanopb/commit/7b396821ddd06df8e39143f16e1dc0a4645b89a3
- https://github.com/nanopb/nanopb/commit/aa9d0d1ca78d6adec3adfeecf3a706c7f9df81f2
- https://github.com/nanopb/nanopb/security/advisories/GHSA-gcx3-7m76-287p
- https://github.com/nanopb/nanopb/commit/45582f1f97f49e2abfdba1463d1e1027682d9856
- https://github.com/nanopb/nanopb/commit/7b396821ddd06df8e39143f16e1dc0a4645b89a3
- https://github.com/nanopb/nanopb/commit/aa9d0d1ca78d6adec3adfeecf3a706c7f9df81f2
- https://github.com/nanopb/nanopb/security/advisories/GHSA-gcx3-7m76-287p
Products affected by CVE-2020-5235
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cpe:2.3:a:nanopb_project:nanopb:-
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cpe:2.3:a:nanopb_project:nanopb:0.1.0
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cpe:2.3:a:nanopb_project:nanopb:0.1.1
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cpe:2.3:a:nanopb_project:nanopb:0.1.2
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cpe:2.3:a:nanopb_project:nanopb:0.1.3
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cpe:2.3:a:nanopb_project:nanopb:0.1.4
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cpe:2.3:a:nanopb_project:nanopb:0.1.5
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cpe:2.3:a:nanopb_project:nanopb:0.1.6
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cpe:2.3:a:nanopb_project:nanopb:0.1.7
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cpe:2.3:a:nanopb_project:nanopb:0.1.8
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cpe:2.3:a:nanopb_project:nanopb:0.1.9
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cpe:2.3:a:nanopb_project:nanopb:0.1.9.1
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cpe:2.3:a:nanopb_project:nanopb:0.2.0
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cpe:2.3:a:nanopb_project:nanopb:0.2.1
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cpe:2.3:a:nanopb_project:nanopb:0.2.2
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cpe:2.3:a:nanopb_project:nanopb:0.2.3
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cpe:2.3:a:nanopb_project:nanopb:0.2.4
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cpe:2.3:a:nanopb_project:nanopb:0.2.5
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cpe:2.3:a:nanopb_project:nanopb:0.2.6
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cpe:2.3:a:nanopb_project:nanopb:0.2.7
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cpe:2.3:a:nanopb_project:nanopb:0.2.8
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cpe:2.3:a:nanopb_project:nanopb:0.2.9
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cpe:2.3:a:nanopb_project:nanopb:0.2.9.1
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cpe:2.3:a:nanopb_project:nanopb:0.2.9.2
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cpe:2.3:a:nanopb_project:nanopb:0.2.9.3
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cpe:2.3:a:nanopb_project:nanopb:0.3.0
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cpe:2.3:a:nanopb_project:nanopb:0.3.1
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cpe:2.3:a:nanopb_project:nanopb:0.3.2
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cpe:2.3:a:nanopb_project:nanopb:0.3.3
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cpe:2.3:a:nanopb_project:nanopb:0.3.4
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cpe:2.3:a:nanopb_project:nanopb:0.3.5
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cpe:2.3:a:nanopb_project:nanopb:0.3.6
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cpe:2.3:a:nanopb_project:nanopb:0.3.7
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cpe:2.3:a:nanopb_project:nanopb:0.3.8
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cpe:2.3:a:nanopb_project:nanopb:0.3.9
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cpe:2.3:a:nanopb_project:nanopb:0.3.9.1
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cpe:2.3:a:nanopb_project:nanopb:0.3.9.2
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cpe:2.3:a:nanopb_project:nanopb:0.3.9.3
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cpe:2.3:a:nanopb_project:nanopb:0.3.9.4
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cpe:2.3:a:nanopb_project:nanopb:0.4.0