SRC-2022-0003 : Adobe Acrobat Reader DC abs Type 2 Font Parsing Charstring Out-of-Bounds Read Information Disclosure Vulnerability

CVE ID:

CVE-2021-44715

CVSS Score:

3.3, (/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N)

Affected Vendors:

Adobe

Affected Products:

Acrobat Reader DC

Vulnerability Details:

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Acrobat Reader DC. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of type 2 fonts. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process.

Vendor Response:

Adobe has issued an update to correct this vulnerability. More details can be found at: https://helpx.adobe.com/security/products/acrobat/apsb22-01.html

Disclosure Timeline:

• 2021-10-21 - Discovered and reported to Adobe PSIRT
• 2022-01-14 - Coordinated public release of advisory

Credit:

This vulnerability was discovered by Rocco Calvi (TecR0c) and Steven Seeley of Qihoo 360 Vulnerability Research Insititute