CVE-2010-3625 in Acrobat Reader
Summary
by MITRE
Adobe Reader and Acrobat 9.x before 9.4, and 8.x before 8.2.5 on Windows and Mac OS X, allow attackers to execute arbitrary code via unspecified vectors, related to a "prefix protocol handler vulnerability."
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Analysis
by VulDB Data Team • 09/26/2021
The vulnerability identified as CVE-2010-3625 represents a critical security flaw in Adobe Reader and Acrobat software versions prior to 9.4 and 8.2.5 respectively, affecting both Windows and Mac OS X operating systems. This issue stems from a prefix protocol handler vulnerability that enables malicious actors to exploit the software's handling of specific protocol prefixes. The flaw exists within the software's interpretation of file protocols, particularly when processing documents that contain embedded links or references to external resources. Attackers can manipulate these protocol handlers to execute arbitrary code on vulnerable systems, potentially leading to complete system compromise. The vulnerability's impact extends beyond simple code execution as it provides a pathway for attackers to bypass standard security measures and gain unauthorized access to target environments.
The technical nature of this vulnerability aligns with CWE-170, which addresses improper handling of input that can lead to code execution, and represents a specific instance of protocol handler abuse. The prefix protocol handler vulnerability occurs when the application fails to properly validate or sanitize protocol prefixes contained within document files. This weakness allows attackers to craft malicious PDF documents that contain specially formatted protocol references which, when processed by the vulnerable Adobe Reader or Acrobat, trigger unintended code execution. The exploitation typically involves embedding malicious URLs or protocol handlers within PDF files that, when clicked or automatically processed by the software, execute code on the victim's system. This type of vulnerability is particularly dangerous because it can be delivered through email attachments or web downloads, making it a common vector for social engineering attacks.
The operational impact of CVE-2010-3625 is severe and multifaceted, as it provides attackers with a reliable method to achieve remote code execution on systems running vulnerable Adobe software. Organizations that rely heavily on PDF document processing are particularly at risk, as this vulnerability can be exploited through routine document handling activities. The attack surface is broad since PDF files are commonly shared across networks and can be easily distributed through various channels including email, web downloads, and file sharing systems. Successful exploitation can result in complete system compromise, allowing attackers to install malware, steal sensitive data, or establish persistent access to network resources. The vulnerability also enables privilege escalation attacks, as the code execution can occur with the privileges of the user running the vulnerable software, potentially leading to administrative access if the user has elevated permissions.
Mitigation strategies for CVE-2010-3625 should focus on immediate software updates and implementation of additional security controls. The primary and most effective mitigation is to upgrade to Adobe Reader and Acrobat versions 9.4 or 8.2.5 and later, which contain patches addressing the prefix protocol handler vulnerability. Organizations should implement comprehensive patch management processes to ensure all systems are updated promptly. Additional protective measures include restricting PDF file processing capabilities through browser settings, implementing strict content filtering for PDF documents, and deploying sandboxing technologies to isolate PDF processing activities. Network-level protections such as deep packet inspection and web application firewalls can help detect and block malicious PDF content before it reaches end-user systems. Security awareness training should emphasize the dangers of opening PDF attachments from untrusted sources, as this vulnerability is often exploited through phishing campaigns. The ATT&CK framework categorizes this vulnerability under T1203, which covers "Exploitation for Client Execution," highlighting the importance of defending against client-side exploitation techniques that leverage software vulnerabilities to gain unauthorized access to systems.