nanopb: Nanopb is a small code-size Protocol Buffers implementation in ansi C
CVE-2021-21401 is fixed in nanopb on 1 platform by nanopb 0.4.1-1ubuntu0.1~esm1 (version 0.4.1-1ubuntu0.1~esm1), released March 23, 2021. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| nanopb · Ubuntu 20.04 LTS (focal) | 0.4.1-1ubuntu0.1~esm1 | nanopb 0.4.1-1ubuntu0.1~esm1 | Mar 23, 2021 |
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