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.
Advisories
Source ID Title
EUVD EUVD EUVD-2021-0139 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.
Github GHSA Github GHSA GHSA-7mv5-5mxh-qg88 nanopb vulnerable to invalid free() call with oneofs and PB_ENABLE_MALLOC
Ubuntu USN Ubuntu USN USN-6121-1 Nanopb vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

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History

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2024-08-03T18:09:16.087Z

Reserved: 2020-12-22T00:00:00

Link: CVE-2021-21401

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-03-23T18:15:13.160

Modified: 2024-11-21T05:48:16.910

Link: CVE-2021-21401

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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