Oracle MySQL Shell up to 8.0.31 Core Client out-of-bounds write

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 (≈)
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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.
8.9$5k-$25k0.00

Summaryinfo

A vulnerability was found in Oracle MySQL Shell up to 8.0.31. It has been classified as very critical. Affected by this issue is some unknown functionality of the component Core Client. Performing a manipulation results in an unknown weakness. This vulnerability is cataloged as CVE-2020-36242. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Oracle MySQL Shell up to 8.0.31 (Database Software). It has been classified as very critical. This affects an unknown code block of the component Core Client. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, and availability.

The weakness was shared 01/17/2023 as Oracle Critical Patch Update Advisory - January 2023. The advisory is shared at oracle.com. This vulnerability is uniquely identified as CVE-2020-36242. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 05/16/2025).

We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 236731 (Alibaba Cloud Linux 3 : 0083: python-cryptography (ALINUX3-SA-2022:0083)), which helps to determine the existence of the flaw in a target environment.

A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (236731). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.1
VulDB Meta Temp Score: 8.9

VulDB Base Score: 9.1
VulDB Temp Score: 8.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 236731
Nessus Name: Alibaba Cloud Linux 3 : 0083: python-cryptography (ALINUX3-SA-2022:0083)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

02/07/2021 🔍
01/17/2023 +709 days 🔍
01/17/2023 +0 days 🔍
01/18/2023 +1 days 🔍
05/16/2025 +849 days 🔍

Sourcesinfo

Vendor: oracle.com

Advisory: Oracle Critical Patch Update Advisory - January 2023
Status: Confirmed

CVE: CVE-2020-36242 (🔍)
GCVE (CVE): GCVE-0-2020-36242
GCVE (VulDB): GCVE-100-218769

Entryinfo

Created: 01/18/2023 07:28
Updated: 05/16/2025 13:43
Changes: 01/18/2023 07:28 (38), 02/13/2023 22:29 (2), 02/13/2023 22:42 (19), 02/13/2023 22:51 (1), 09/05/2024 18:24 (15), 05/16/2025 13:43 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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