CVE-2021-35394 : Realtek Jungle SDK version v2.x up to v3.4.14B provides a diagnostic tool called

Realtek Jungle SDK version v2.x up to v3.4.14B provides a diagnostic tool called 'MP Daemon' that is usually compiled as 'UDPServer' binary. The binary is affected by multiple memory corruption vulnerabilities and an arbitrary command injection vulnerability that can be exploited by remote unauthenticated attackers.

Published 2021-08-16 12:15:07

Updated 2025-02-04 20:15:43

Source MITRE

View at NVD, CVE.org

Vulnerability category: Memory Corruption

Products affected by CVE-2021-35394

Realtek » Realtek Jungle Sdk
Versions from including (>=) 2.0 and up to, including, (<=) 3.4.14b
cpe:2.3:a:realtek:realtek_jungle_sdk:*:*:*:*:*:*:*:*
Matching versions

CVE-2021-35394 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:

Realtek Jungle SDK Remote Code Execution Vulnerability

CISA required action:

Apply updates per vendor instructions.

CISA description:

RealTek Jungle SDK contains multiple memory corruption vulnerabilities which can allow an attacker to perform remote code execution.

Notes:

https://nvd.nist.gov/vuln/detail/CVE-2021-35394

Added on 2021-12-10 Action due date 2021-12-24

Exploit prediction scoring system (EPSS) score for CVE-2021-35394

EPSS FAQ

94.34%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 100 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-35394

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
10.0	HIGH	AV:N/AC:L/Au:N/C:C/I:C/A:C	10.0	10.0	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	134c704f-9b21-4f2e-91b3-4a467353bcc0	2025-02-04
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2021-35394

CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

Assigned by: nvd@nist.gov (Primary)
CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Assigned by: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-35394

https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf

Patch;Vendor Advisory

CVEs referencing this url
https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain

Advisory: Multiple Issues in Realtek SDK Affects Hundreds of Thousands of Devices Down the Supply Chain - IoT Inspector
Exploit;Third Party Advisory

CVEs referencing this url
https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en

Taiwan Headquarters - REALTEK
Patch;Vendor Advisory

CVEs referencing this url
https://www.securityfocus.com/archive/1/534765

Bugtraq
Third Party Advisory;VDB Entry

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