2021-2390 | Oracle MySQL Server InnoDB denial of service
|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.
A vulnerability, which was classified as critical, has been found in Oracle MySQL Server up to 5.7.34/8.0.25 (Database Software). This issue affects an unknown function of the component InnoDB. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. Impacted is availability. The summary by CVE is:
Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are 5.7.34 and prior and 8.0.25 and prior. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 5.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H).
The weakness was published 07/20/2021 as Oracle Critical Patch Update Advisory – July 2021. The advisory is shared at oracle.com. The identification of this vulnerability is CVE-2021-2390 since 12/09/2020. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/24/2021). MITRE ATT&CK project uses the attack technique T1499 for this issue.
Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.
VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.7
VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔒
VulDB Reliability: 🔍
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Class: Denial of service
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒
Active Actors: 🔍
Active APT Groups: 🔍Recommended: Upgrade
Reaction Time: 🔒
0-Day Time: 🔒
Exposure Time: 🔒
12/09/2020 CVE assigned
07/20/2021 +222 days Advisory disclosed
07/20/2021 +0 days Countermeasure disclosed
07/21/2021 +1 days VulDB entry created
07/24/2021 +3 days VulDB last updateVendor: https://www.oracle.com
Advisory: Oracle Critical Patch Update Advisory – July 2021
CVE: CVE-2021-2390 (🔒)
Created: 07/21/2021 10:37
Updated: 07/24/2021 20:54
Changes: (1) source_cve_cna
Download the whitepaper to learn more about our service!