Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nanopb Project | Nanopb | < 0.2.9.4 |
Related Weaknesses (CWE)
References
- https://github.com/nanopb/nanopb/commit/45582f1f97f49e2abfdba1463d1e1027682d9856PatchThird Party Advisory
- https://github.com/nanopb/nanopb/commit/7b396821ddd06df8e39143f16e1dc0a4645b89a3PatchThird Party Advisory
- https://github.com/nanopb/nanopb/commit/aa9d0d1ca78d6adec3adfeecf3a706c7f9df81f2PatchThird Party Advisory
- https://github.com/nanopb/nanopb/security/advisories/GHSA-gcx3-7m76-287pPatchThird Party Advisory
- https://github.com/nanopb/nanopb/commit/45582f1f97f49e2abfdba1463d1e1027682d9856PatchThird Party Advisory
- https://github.com/nanopb/nanopb/commit/7b396821ddd06df8e39143f16e1dc0a4645b89a3PatchThird Party Advisory
- https://github.com/nanopb/nanopb/commit/aa9d0d1ca78d6adec3adfeecf3a706c7f9df81f2PatchThird Party Advisory
- https://github.com/nanopb/nanopb/security/advisories/GHSA-gcx3-7m76-287pPatchThird Party Advisory
FAQ
What is CVE-2020-5235?
CVE-2020-5235 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 st...
How severe is CVE-2020-5235?
CVE-2020-5235 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-5235?
Check the references section above for vendor advisories and patch information. Affected products include: Nanopb Project Nanopb.