CVE-2022-34232 in Acrobat Reader
Summary
by MITRE • 07/15/2022
Adobe Acrobat Reader versions 22.001.20142 (and earlier), 20.005.30334 (and earlier) and 17.012.30229 (and earlier) are affected by a Use After Free vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to bypass mitigations such as ASLR. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
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Analysis
by VulDB Data Team • 08/01/2022
The vulnerability identified as CVE-2022-34232 represents a critical use after free flaw in Adobe Acrobat Reader affecting multiple version ranges including 22.001.20142 and earlier, 20.005.30334 and earlier, and 17.012.30229 and earlier. This type of vulnerability occurs when a program continues to reference memory after it has been freed, creating a dangerous state where subsequent operations can corrupt or expose sensitive data. The flaw specifically resides within the document processing functionality of the Acrobat Reader application, making it particularly dangerous given the widespread use of PDF documents in enterprise and personal environments.
The technical nature of this use after free vulnerability creates significant security implications that extend beyond simple memory corruption. When an attacker successfully exploits this flaw, they can manipulate the freed memory location to achieve arbitrary code execution or more specifically bypass critical security mitigations such as Address Space Layout Randomization. This bypass capability represents a sophisticated attack vector that undermines fundamental operating system security mechanisms designed to prevent exploitation. The vulnerability requires user interaction through opening a malicious file, making it a classic social engineering target that leverages human factors in addition to technical exploitation.
The operational impact of CVE-2022-34232 extends across enterprise security boundaries due to the ubiquitous nature of Adobe Acrobat Reader in business environments. Organizations that rely heavily on PDF document processing become particularly vulnerable to targeted attacks where adversaries craft malicious PDF files to exploit this specific flaw. The vulnerability's potential to bypass ASLR creates a pathway for attackers to gain deeper system access and potentially escalate privileges, making it a high-value target for advanced persistent threat actors. Security teams must consider this vulnerability as part of broader exploit chains that could lead to full system compromise.
Mitigation strategies for this vulnerability should prioritize immediate patch management across all affected versions of Adobe Acrobat Reader. The remediation process involves updating to the latest versions that contain the patched implementation of memory management routines. Organizations should also implement additional security controls such as restricting PDF file execution in high-security environments and deploying sandboxing solutions to isolate PDF processing activities. From a compliance perspective, this vulnerability aligns with CWE-416 which specifically addresses use after free conditions, and represents a technique that could be categorized under ATT&CK tactic TA0005 (Defense Evasion) and technique T1055 (Process Injection) when exploited effectively. Network monitoring should be enhanced to detect suspicious PDF file handling activities and anomalous memory access patterns that might indicate exploitation attempts.