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[email protected]CVE-2021-21401

HistoryMar 23, 2021 - 6:15 p.m.

CVE-2021-21401

2021-03-2318:15:13

CWE-763

[email protected]

web.nvd.nist.gov

nanopb

protocol buffers

cve-2021-21401

ansi c

security advisory

5.5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:N/I:P/A:P

7.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

6.8 Medium

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

53.6%

JSON

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.

Affected configurations

Vulners

NVD

Node

nanopbnanopbRange0.3.2–0.3.9.7

nanopbnanopbRange0.4.0–0.4.4

CPENameOperatorVersion
nanopb_project:nanopbnanopb project nanopblt0.3.9.8
nanopb_project:nanopbnanopb project nanopblt0.4.5

CPE	Name	Operator	Version
nanopb_project:nanopb	nanopb project nanopb	lt	0.3.9.8
nanopb_project:nanopb	nanopb project nanopb	lt	0.4.5

CNA 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"
      }
    ]
  }
]