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Out-of-bounds Read

CVE-2020-5235

High
9.8/10

Summary

There is a potentially exploitable out of memory condition In Nanopb prior to 0.2.9.4, 0.3.x prior to 0.3.9.5, and 0.4.x prior to 0.4.1. 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.

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • HIGH

CWE-125 - Out-of-Bounds Read

Out-of-bounds read is a vulnerability that allows access to memory beyond the authorized accessible location. Such a vulnerability compromises the confidentiality of the trusted environment in the application and enables an attacker to launch further attacks by leveraging the exposed information.

References

Advisory Timeline

  • Published