2021-30796 | Apple macOS Model I/O denial of service (HT212602)
|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 classified as problematic was found in Apple macOS (Operating System) (affected version unknown). Affected by this vulnerability is some unknown functionality of the component Model I/O. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. As an impact it is known to affect availability.
The weakness was disclosed 07/21/2021 by Mickey Jin as HT212602 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2021-30796 since 04/13/2021. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn’t need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/28/2021). It is expected to see the exploit prices for this product increasing in the near future.The attack technique deployed by this issue is T1499 according to MITRE ATT&CK. The advisory points out:
Processing a maliciously crafted image may lead to a denial of service
Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:
A logic issue was addressed with improved validation.
VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1
Status: Not defined
04/13/2021 CVE assigned
07/21/2021 +99 days Advisory disclosed
07/21/2021 +0 days Countermeasure disclosed
07/23/2021 +2 days VulDB entry created
07/28/2021 +5 days VulDB last updateVendor: https://www.apple.com/
Researcher: Mickey Jin
Use the official API to access entries easily!