VDB-162494 · CVE-2020-5135 · GCVE-0-2020-5135

SonicWALL SonicOS up to 7.0.0.0 buffer overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.0	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in SonicWALL SonicOS 6.0.5.3/6.5.1.12/6.5.4.7/6.5.4.v/7.0.0.0. This affects an unknown part. Such manipulation leads to buffer overflow. This vulnerability is traded as CVE-2020-5135. The attack may be launched remotely. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability was found in SonicWALL SonicOS 6.0.5.3/6.5.1.12/6.5.4.7/6.5.4.v/7.0.0.0 (Firewall Software). It has been rated as critical. Affected by this issue is an unknown part. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is availability.

The weakness was shared 10/12/2020 by Firewall. The advisory is available at psirt.global.sonicwall.com. This vulnerability is handled as CVE-2020-5135. The attack may be launched remotely. Technical details are unknown but an exploit is available.

It is declared as attacked. This issue was added on 03/15/2022 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 04/05/2022:

Apply updates per vendor instructions.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

Firewall Software

Vendor

SonicWALL

Name

SonicOS

Version

License

commercial

Website

Vendor: https://www.sonicwall.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 7.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/31/2019 🔍
10/12/2020 +285 days 🔍
10/12/2020 +0 days 🔍
02/06/2025 +1578 days 🔍

Sourcesinfo

Vendor: sonicwall.com

Advisory: psirt.global.sonicwall.com
Researcher: Firewall
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2020-5135 (🔍)
GCVE (CVE): GCVE-0-2020-5135
GCVE (VulDB): GCVE-100-162494
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 10/12/2020 15:16
Updated: 02/06/2025 21:53
Changes: 10/12/2020 15:16 (13), 10/12/2020 15:18 (24), 11/17/2020 08:29 (4), 11/18/2020 09:09 (3), 11/18/2020 09:17 (14), 04/24/2024 07:23 (26), 09/09/2024 22:29 (1), 02/06/2025 21:53 (3)
Complete: 🔍
Cache ID: 216::103