2021-35988 | Adobe Acrobat Reader out-of-bounds read (APSB21-51)

By Max On Jul 16, 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.
4.1	$0-$5k	0.63

A vulnerability, which was classified as problematic, was found in Adobe Acrobat Reader up to 2017.011.30197/2020.004.30005/2021.005.20054 (Document Reader Software). Affected is an unknown part. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-125. This is going to have an impact on confidentiality.

The weakness was disclosed 07/13/2021 as APSB21-51. The advisory is available at helpx.adobe.com. This vulnerability is traded as CVE-2021-35988 since 06/30/2021. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn’t require any form of authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/16/2021).

Upgrading to version 2017.011.30199, 2020.004.30006 or 2021.005.20058 eliminates this vulnerability. The upgrade is hosted for download at helpx.adobe.com.

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