CVE-2021-21401 (GCVE-0-2021-21401)
Vulnerability from cvelistv5
Published
2021-03-23 17:45
Modified
2024-08-03 18:09
Severity ?
7.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
CWE
  • CWE-763 - Release of Invalid Pointer or Reference
Summary
Nanopb is a small code-size Protocol Buffers implementation in ansi C. In Nanopb before versions 0.3.9.8 and 0.4.5, decoding a specifically formed message can cause invalid `free()` or `realloc()` calls if the message type contains an `oneof` field, and the `oneof` directly contains both a pointer field and a non-pointer field. If the message data first contains the non-pointer field and then the pointer field, the data of the non-pointer field is incorrectly treated as if it was a pointer value. Such message data rarely occurs in normal messages, but it is a concern when untrusted data is parsed. This has been fixed in versions 0.3.9.8 and 0.4.5. See referenced GitHub Security Advisory for more information including workarounds.
References
Impacted products
Vendor Product Version
nanopb nanopb Version: >= 0.3.2, <= 0.3.9.7
Version: >= 0.4.0, <= 0.4.4
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