CVE-2021-36053 in XMP Toolkit SDK
Summary
by MITRE • 09/01/2021
XMP Toolkit SDK versions 2020.1 (and earlier) are affected by an out-of-bounds read vulnerability that could lead to disclosure of arbitrary 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 • 11/04/2025
The vulnerability identified as CVE-2021-36053 affects the XMP Toolkit SDK version 2020.1 and earlier releases, representing a critical out-of-bounds read flaw that poses significant security risks to affected systems. This vulnerability resides within the XMP Toolkit SDK, which is widely used for handling Extensible Metadata Platform data in various Adobe applications including Photoshop, Lightroom, and Acrobat. The out-of-bounds read condition occurs when the SDK processes malformed XMP metadata structures, specifically during the parsing of certain attribute values that exceed allocated memory boundaries. This flaw falls under CWE-125, which categorizes out-of-bounds read vulnerabilities as a fundamental memory safety issue that can lead to information disclosure and potentially more severe exploitation vectors.
The technical exploitation of this vulnerability requires an attacker to craft a malicious file containing specially constructed XMP metadata that triggers the out-of-bounds read during normal file processing operations. When a victim opens such a crafted file using an affected application, the XMP Toolkit SDK attempts to parse the metadata and encounters the malformed data structure that causes the memory access violation. This specific memory access pattern allows an attacker to read arbitrary memory locations, potentially exposing sensitive information such as stack contents, heap data, or other process memory segments that may contain cryptographic keys, user credentials, or other confidential information. The vulnerability is particularly concerning because it can be leveraged to bypass modern exploit mitigations such as Address Space Layout Randomization, as the memory disclosure can reveal information about process memory layouts and system configurations.
The operational impact of CVE-2021-36053 extends beyond simple information disclosure, as it provides attackers with a foothold for more sophisticated attacks. The ability to read arbitrary memory addresses can enable attackers to gather information about the target system's memory layout, potentially exposing the locations of security-critical functions or data structures. This vulnerability represents a significant concern for organizations using Adobe Creative Suite applications, as these applications are frequently used to process files from untrusted sources, making them prime targets for exploitation. The requirement for user interaction means that successful exploitation typically requires social engineering or phishing campaigns to get victims to open malicious files, but once triggered, the vulnerability can be leveraged to extract sensitive data from the target system's memory space.
Organizations should prioritize immediate remediation of this vulnerability by upgrading to XMP Toolkit SDK version 2020.2 or later, which contains the necessary patches to address the out-of-bounds read condition. The mitigation strategy should include comprehensive application patching across all systems running affected Adobe software, along with enhanced file validation procedures for incoming documents. Security teams should also implement network-based detection measures to identify potential exploitation attempts through monitoring for unusual file processing patterns. Additionally, user education programs should emphasize the importance of avoiding opening suspicious files from untrusted sources, as the vulnerability requires user interaction to be exploited. This vulnerability aligns with ATT&CK technique T1059.007 for execution through malicious file opening and T1068 for privilege escalation through memory disclosure attacks. The remediation approach should also consider implementing application whitelisting policies and sandboxing mechanisms to limit the potential impact of successful exploitation attempts, as the vulnerability could potentially serve as a stepping stone for more advanced persistent threats targeting enterprise environments.