CVE-2021-21401
Assigner: GitHub_M
Published: 2021-03-23T17:45:19
State: PUBLISHED
affected: product: nanopb
vendor: nanopb
versions: status: affected
version: >= 0.3.2, <= 0.3.9.7
status: affected
version: >= 0.4.0, <= 0.4.4
descriptions: value: 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: cvssV3_1: attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: LOW
baseScore: 7.1
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: HIGH
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
version: 3.1
problemTypes: descriptions: cweId: CWE-763
description: CWE-763: Release of Invalid Pointer or Reference
type: CWE
source: advisory: GHSA-7mv5-5mxh-qg88
discovery: UNKNOWN
title: Invalid free() call in Nanopb