CVE-2022-38435 in Illustrator
Summary
by MITRE • 10/25/2022
Adobe Illustrator versions 26.4 (and earlier) and 25.4.7 (and earlier) are affected by an Improper Input Validation vulnerability that could result in arbitrary code execution in the context of the current user. 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 • 11/19/2022
Adobe Illustrator versions 26.4 and earlier, as well as 25.4.7 and earlier, contain a critical improper input validation vulnerability designated as CVE-2022-38435. This flaw resides within the application's handling of malformed input data during file processing operations, specifically affecting the software's ability to validate and sanitize file content before rendering. The vulnerability stems from insufficient validation mechanisms that fail to properly check the integrity and structure of imported files, creating a pathway for malicious actors to craft specially designed documents that exploit this weakness. The vulnerability is classified under CWE-20, which represents improper input validation, a fundamental security weakness that manifests when applications fail to adequately validate or sanitize input data before processing. The attack vector requires user interaction, meaning victims must voluntarily open a maliciously crafted file for the exploit to succeed, making this a prime example of a social engineering component within the attack chain.
The technical execution of this vulnerability enables arbitrary code execution within the security context of the currently logged-in user, bypassing typical security boundaries that would normally prevent unauthorized code execution. When a user opens a malicious file, the vulnerable Illustrator application processes the malformed input without proper validation, allowing attacker-controlled code to execute with the privileges of the current user account. This represents a significant escalation from a simple input validation flaw to a full remote code execution vulnerability, as the malicious payload can leverage the user's permissions to access system resources, modify files, or establish persistence mechanisms. The exploitation process typically involves crafting a file that contains malicious code embedded within seemingly legitimate document structures, taking advantage of Illustrator's file parsing routines that do not adequately verify the legitimacy of the input data.
The operational impact of this vulnerability extends beyond simple code execution to encompass potential system compromise and data exfiltration capabilities. Attackers who successfully exploit this vulnerability can establish persistent access to compromised systems, potentially using the compromised Illustrator installation as a foothold for further lateral movement within networks. The vulnerability's requirement for user interaction creates a realistic attack scenario where social engineering campaigns could effectively target Illustrator users, particularly those working with design files from untrusted sources. This makes the vulnerability particularly dangerous in enterprise environments where design professionals regularly exchange files with external partners or clients, creating numerous potential attack vectors. The vulnerability's presence in both major release lines demonstrates a significant oversight in the application's input validation mechanisms that affects a wide user base.
Mitigation strategies for CVE-2022-38435 should prioritize immediate software updates to the latest available versions of Adobe Illustrator, which contain patches addressing the improper input validation flaw. Organizations should implement strict file validation policies, including the use of sandboxed environments for opening untrusted design files, and establish comprehensive user education programs to raise awareness about the risks of opening suspicious files. Network-level defenses should include content filtering mechanisms that can identify and block potentially malicious design files, while endpoint protection solutions should be configured to monitor for unusual execution patterns that might indicate exploitation attempts. The vulnerability's classification under ATT&CK technique T1203 (Exploitation for Client Execution) emphasizes the need for layered security approaches that combine traditional patch management with behavioral monitoring and user awareness training to effectively defend against this class of attack. Security teams should also consider implementing file integrity monitoring solutions that can detect unauthorized modifications to Illustrator installation files, as attackers may attempt to modify the application itself to bypass security controls.