CVE-2016-1123 in Acrobat Reader
Summary
by MITRE
Adobe Reader and Acrobat before 11.0.16, Acrobat and Acrobat Reader DC Classic before 15.006.30172, and Acrobat and Acrobat Reader DC Continuous before 15.016.20039 on Windows and OS X allow attackers to execute arbitrary code or cause a denial of service (memory corruption) via unspecified vectors, a different vulnerability than CVE-2016-1037, CVE-2016-1063, CVE-2016-1064, CVE-2016-1071, CVE-2016-1072, CVE-2016-1073, CVE-2016-1074, CVE-2016-1076, CVE-2016-1077, CVE-2016-1078, CVE-2016-1080, CVE-2016-1081, CVE-2016-1082, CVE-2016-1083, CVE-2016-1084, CVE-2016-1085, CVE-2016-1086, CVE-2016-1088, CVE-2016-1093, CVE-2016-1095, CVE-2016-1116, CVE-2016-1118, CVE-2016-1119, CVE-2016-1120, CVE-2016-1124, CVE-2016-1125, CVE-2016-1126, CVE-2016-1127, CVE-2016-1128, CVE-2016-1129, CVE-2016-1130, CVE-2016-4088, CVE-2016-4089, CVE-2016-4090, CVE-2016-4093, CVE-2016-4094, CVE-2016-4096, CVE-2016-4097, CVE-2016-4098, CVE-2016-4099, CVE-2016-4100, CVE-2016-4101, CVE-2016-4103, CVE-2016-4104, and CVE-2016-4105.
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Analysis
by VulDB Data Team • 10/22/2024
This vulnerability affects Adobe Reader and Acrobat products across multiple versions, representing a critical memory corruption flaw that enables remote code execution or denial of service attacks. The vulnerability exists in the handling of unspecified vectors within the software's processing mechanisms, making it particularly dangerous as attackers can exploit it through various attack vectors without specific knowledge of the exact trigger. The affected versions include Adobe Reader and Acrobat before 11.0.16, as well as Acrobat and Acrobat Reader DC Classic before 15.006.30172 and DC Continuous before 15.016.20039 on both Windows and OS X operating systems. This memory corruption vulnerability falls under the broader category of heap-based buffer overflows and memory management flaws that have been consistently identified in Adobe's products over the years, as documented in the CWE database under CWE-122 Heap-based Buffer Overflow and CWE-125 Out-of-bounds Read categories. The vulnerability's impact extends beyond simple exploitation as it represents a fundamental weakness in how the software manages memory allocation and deallocation, creating opportunities for attackers to inject malicious code or cause system instability. Security researchers have noted that such vulnerabilities often manifest through crafted PDF files that, when opened by the vulnerable software, trigger the memory corruption through improper input validation or handling of malformed data structures. The attack surface for this vulnerability includes not only direct exploitation but also potential chain reactions where attackers might leverage the memory corruption to bypass security controls or escalate privileges within the target system. According to ATT&CK framework, this vulnerability aligns with T1203 Exploitation for Client Execution and T1059 Command and Scripting Interpreter techniques, where attackers can execute arbitrary code through the compromised application. The vulnerability's classification as a memory corruption issue also places it within the scope of T1555 Credential Access and T1068 Exploitation for Privilege Escalation, as successful exploitation could lead to system compromise and unauthorized access to sensitive information. Organizations running these vulnerable versions face significant risk as attackers have developed various techniques to craft malicious PDF documents that trigger this specific memory corruption flaw, making it a high-priority target for exploitation campaigns. The complexity of this vulnerability lies in its unspecified vector nature, which means that attackers can potentially exploit it through multiple methods, including embedded JavaScript, malformed objects, or manipulated streams within PDF files. The memory corruption aspect of this vulnerability creates opportunities for attackers to manipulate heap memory structures, potentially leading to arbitrary code execution in the context of the vulnerable application. This type of vulnerability has historically been particularly challenging to defend against as it often requires deep understanding of the application's memory management and can be difficult to detect through traditional security controls. The exploitation of this vulnerability typically involves crafting a malicious PDF file that, when opened in the vulnerable software, causes the application to improperly handle memory operations, leading to either code execution or system crash. Security professionals have identified that this vulnerability represents a significant risk to enterprise environments where Adobe Reader is widely deployed, as it provides attackers with a reliable method for achieving initial compromise through social engineering campaigns targeting PDF documents. The vulnerability's persistence across multiple product versions and operating systems indicates that it represents a fundamental flaw in the software architecture rather than a simple coding error, suggesting that organizations need to implement comprehensive patch management strategies to address this issue effectively.
The technical nature of this vulnerability demonstrates how memory corruption flaws in widely used applications can create extensive attack surfaces. The unspecified vectors mentioned in the description indicate that attackers can leverage multiple entry points to trigger the memory corruption, making the vulnerability particularly dangerous as defenders must account for numerous potential exploitation methods. This type of vulnerability commonly occurs in applications that process untrusted input data, such as PDF files, where improper bounds checking or memory management can lead to heap corruption. The vulnerability's classification aligns with CWE-122 and CWE-125 categories, which specifically address heap-based buffer overflows and out-of-bounds reads, respectively. These classifications help security researchers and defenders understand the underlying root cause and develop appropriate mitigation strategies. The memory corruption aspect of this vulnerability creates opportunities for attackers to manipulate the application's execution flow through controlled memory overwrite attacks. According to ATT&CK framework, this vulnerability enables techniques such as T1059 Command and Scripting Interpreter where attackers can execute malicious code through the compromised application, and T1203 Exploitation for Client Execution which describes how attackers can use client-side exploits to gain initial access. The vulnerability's impact is further exacerbated by the fact that it affects both Adobe Reader and Acrobat products, which are commonly used across enterprise environments, creating a broad attack surface for potential exploitation. Organizations must understand that this vulnerability represents a critical security gap that can be exploited without requiring specialized knowledge of the specific attack vector, making it particularly dangerous for widespread deployment. The vulnerability's persistence across multiple versions and platforms indicates that it represents a systemic issue in Adobe's software development practices rather than an isolated incident. This makes it essential for organizations to implement comprehensive security measures including immediate patching, network segmentation, and application whitelisting to protect against potential exploitation. The memory corruption nature of this vulnerability also means that it can potentially be chained with other exploits to create more sophisticated attack vectors, making it a significant concern for security professionals who must consider the broader threat landscape when addressing this vulnerability.
Mitigation strategies for this vulnerability must address both immediate remediation and longer-term security improvements. The primary recommendation involves immediate patching of all affected versions, as Adobe has released security updates to address this specific memory corruption flaw. Organizations should prioritize patch management processes to ensure that all instances of vulnerable software are updated promptly, as the vulnerability's exploitation potential makes it a high-priority target for attackers. Network-based defenses such as web application firewalls and content filtering solutions can provide additional protection by blocking potentially malicious PDF files from reaching vulnerable systems. The implementation of application whitelisting policies can prevent unauthorized applications from executing, reducing the attack surface for exploitation attempts. Security teams should also consider implementing sandboxing techniques to isolate PDF processing activities and limit the potential impact of successful exploitation attempts. According to industry best practices and the MITRE ATT&CK framework, organizations should implement layered security approaches that include both preventive and detective controls to address this type of vulnerability effectively. The vulnerability's nature as a memory corruption flaw suggests that traditional antivirus solutions may not be sufficient for detection, requiring more sophisticated behavioral monitoring and anomaly detection systems. Regular security assessments and penetration testing can help organizations identify potential exploitation vectors and validate the effectiveness of their mitigation strategies. The vulnerability's widespread impact across multiple Adobe products and operating systems necessitates comprehensive security policies that address all potential attack vectors and implementation approaches. Organizations should also consider implementing security awareness training programs to reduce the risk of successful social engineering attacks that might deliver malicious PDF files to vulnerable systems. The memory corruption aspect of this vulnerability also highlights the importance of secure coding practices and regular code reviews to prevent similar issues from occurring in future software development cycles. Implementation of proper input validation and memory management techniques in software development can help prevent similar vulnerabilities from being introduced into future versions of Adobe products and other software applications.