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CVE-2021-21401 Detail

Description

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.


Metrics

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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/nanopb/nanopb/blob/c9124132a604047d0ef97a09c0e99cd9bed2c818/CHANGELOG.txt#L1 Release Notes  Third Party Advisory 
https://github.com/nanopb/nanopb/blob/c9124132a604047d0ef97a09c0e99cd9bed2c818/CHANGELOG.txt#L1 Release Notes  Third Party Advisory 
https://github.com/nanopb/nanopb/commit/e2f0ccf939d9f82931d085acb6df8e9a182a4261 Patch  Third Party Advisory 
https://github.com/nanopb/nanopb/commit/e2f0ccf939d9f82931d085acb6df8e9a182a4261 Patch  Third Party Advisory 
https://github.com/nanopb/nanopb/issues/647 Exploit  Issue Tracking  Third Party Advisory 
https://github.com/nanopb/nanopb/issues/647 Exploit  Issue Tracking  Third Party Advisory 
https://github.com/nanopb/nanopb/security/advisories/GHSA-7mv5-5mxh-qg88 Exploit  Patch  Third Party Advisory 
https://github.com/nanopb/nanopb/security/advisories/GHSA-7mv5-5mxh-qg88 Exploit  Patch  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-763 Release of Invalid Pointer or Reference GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-21401
NVD Published Date:
03/23/2021
NVD Last Modified:
11/21/2024
Source:
GitHub, Inc.