CVE-2020-26243

Published: Nov 25, 2020 Last Modified: Nov 21, 2024 EU-VD ID: EUVD-2020-1450 Aliases: GHSA-85rr-4rh9-hhwh
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 7,5
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
MEDIUM 4,3
Source: [email protected]
Access Vector: network
Access Complexity: medium
Authentication: none
Confidentiality: none
Integrity: none
Availability: partial

Description

AI Translation Available

Nanopb is a small code-size Protocol Buffers implementation. In Nanopb before versions 0.4.4 and 0.3.9.7, decoding specifically formed message can leak memory if dynamic allocation is enabled and an oneof field contains a static submessage that contains a dynamic field, and the message being decoded contains the submessage multiple times. This is rare in normal messages, but it is a concern when untrusted data is parsed. This is fixed in versions 0.3.9.7 and 0.4.4. The following workarounds are available: 1) Set the option `no_unions` for the oneof field. This will generate fields as separate instead of C union, and avoids triggering the problematic code. 2) Set the type of the submessage field inside oneof to `FT_POINTER`. This way the whole submessage will be dynamically allocated and the problematic code is not executed. 3) Use an arena allocator for nanopb, to make sure all memory can be released afterwards.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0011
Percentile
0,3th
Updated

EPSS Score Trend (Last 90 Days)

20

Improper Input Validation

Stable
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Confidentiality Integrity
Potential Impacts:
Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Read Memory Read Files Or Directories Modify Memory Execute Unauthorized Code Or Commands
Applicable Platforms
All platforms may be affected
Likelihood of Exploit: High
View CWE Details
119

Improper Restriction of Operations within the Bounds of a Memory Buffer

Stable
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Confidentiality Availability
Potential Impacts:
Execute Unauthorized Code Or Commands Modify Memory Read Memory Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory)
Applicable Platforms
Languages: Assembly, C, C++, Memory-Unsafe
Likelihood of Exploit: High
View CWE Details
Application

Nanopb by Nanopb Project

Product Information
Vendor Nanopb Project
Product Nanopb
Version Range Affected
From 0.4.0 (inclusive)
To 0.4.4 (exclusive)
cpe:2.3:a:nanopb_project:nanopb:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Nanopb by Nanopb Project

Product Information
Vendor Nanopb Project
Product Nanopb
Version Range Affected
To 0.3.9.7 (exclusive)
cpe:2.3:a:nanopb_project:nanopb:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://github.com/nanopb/nanopb/blob/2b48a361786dfb1f63d22…
Release Notes Third Party Advisory
https://github.com/nanopb/nanopb/blob/2b48a361786dfb1f63d229840217a93aae064667/…
https://github.com/nanopb/nanopb/commit/4fe23595732b6f1254c…
Patch Third Party Advisory
https://github.com/nanopb/nanopb/commit/4fe23595732b6f1254cfc11a9b8d6da900b55b0c
https://github.com/nanopb/nanopb/issues/615
Exploit Patch Third Party Advisory
https://github.com/nanopb/nanopb/issues/615
https://github.com/nanopb/nanopb/security/advisories/GHSA-8…
Third Party Advisory
https://github.com/nanopb/nanopb/security/advisories/GHSA-85rr-4rh9-hhwh
https://github.com/nanopb/nanopb/blob/2b48a361786dfb1f63d22…
Release Notes Third Party Advisory
https://github.com/nanopb/nanopb/blob/2b48a361786dfb1f63d229840217a93aae064667/…
https://github.com/nanopb/nanopb/commit/4fe23595732b6f1254c…
Patch Third Party Advisory
https://github.com/nanopb/nanopb/commit/4fe23595732b6f1254cfc11a9b8d6da900b55b0c
https://github.com/nanopb/nanopb/issues/615
Exploit Patch Third Party Advisory
https://github.com/nanopb/nanopb/issues/615
https://github.com/nanopb/nanopb/security/advisories/GHSA-8…
Third Party Advisory
https://github.com/nanopb/nanopb/security/advisories/GHSA-85rr-4rh9-hhwh