2021-28636 | Adobe Acrobat Reader uncontrolled search path (APSB21-51)

By Max On Jul 17, 2021

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.
5.1	$0-$5k	0.26

A vulnerability was found in Adobe Acrobat Reader up to 2017.011.30197/2020.004.30005/2021.005.20054 (Document Reader Software). It has been declared as critical. Affected by this vulnerability is some unknown functionality. The manipulation with an unknown input leads to a privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-427. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was published 07/13/2021 as APSB21-51. It is possible to read the advisory at helpx.adobe.com. This vulnerability is known as CVE-2021-28636 since 03/16/2021. The exploitation appears to be easy. Attacking locally is a requirement. A single authentication is required for exploitation. 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 07/17/2021).

Upgrading to version 2017.011.30199, 2020.004.30006 or 2021.005.20058 eliminates this vulnerability.

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