CVE-2020-5235
Depending on platform this can result in a crash or further memory corruption, which may be exploitable in some cases.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.73%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.73% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- nanopb project/nanopb
- Source
- security-advisories@github.com
References
- https://github.com/nanopb/nanopb/commit/45582f1f97f49e2abfdba1463d1e1027682d9856Patch, Third Party Advisory
- https://github.com/nanopb/nanopb/commit/7b396821ddd06df8e39143f16e1dc0a4645b89a3Patch, Third Party Advisory
- https://github.com/nanopb/nanopb/commit/aa9d0d1ca78d6adec3adfeecf3a706c7f9df81f2Patch, Third Party Advisory
- https://github.com/nanopb/nanopb/security/advisories/GHSA-gcx3-7m76-287pPatch, Third Party Advisory
- https://github.com/nanopb/nanopb/commit/45582f1f97f49e2abfdba1463d1e1027682d9856Patch, Third Party Advisory
- https://github.com/nanopb/nanopb/commit/7b396821ddd06df8e39143f16e1dc0a4645b89a3Patch, Third Party Advisory
- https://github.com/nanopb/nanopb/commit/aa9d0d1ca78d6adec3adfeecf3a706c7f9df81f2Patch, Third Party Advisory
- https://github.com/nanopb/nanopb/security/advisories/GHSA-gcx3-7m76-287pPatch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.