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.
                
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Affected Vendors & Products
Advisories
    | Source | ID | Title | 
|---|---|---|
|  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 | GHSA-7mv5-5mxh-qg88 | nanopb vulnerable to invalid free() call with oneofs and PB_ENABLE_MALLOC | 
|  Ubuntu USN | USN-6121-1 | Nanopb vulnerabilities | 
Fixes
    Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
        History
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 MITRE
                        MITRE
                    Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2024-08-03T18:09:16.087Z
Reserved: 2020-12-22T00:00:00
Link: CVE-2021-21401
 Vulnrichment
                        Vulnrichment
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 NVD
                        NVD
                    Status : Modified
Published: 2021-03-23T18:15:13.160
Modified: 2024-11-21T05:48:16.910
Link: CVE-2021-21401
 Redhat
                        Redhat
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 OpenCVE Enrichment
                        OpenCVE Enrichment
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