CVE-2009-1098 in JRE
Summary
by MITRE
Buffer overflow in Java SE Development Kit (JDK) and Java Runtime Environment (JRE) 5.0 Update 17 and earlier; 6 Update 12 and earlier; 1.4.2_19 and earlier; and 1.3.1_24 and earlier allows remote attackers to access files or execute arbitrary code via a crafted GIF image, aka CR 6804998.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 08/09/2021
The vulnerability described in CVE-2009-1098 represents a critical buffer overflow flaw within the Java platform's handling of graphics file processing, specifically affecting multiple versions of the Java Development Kit and Runtime Environment. This vulnerability stems from insufficient bounds checking during the parsing of GIF image files, creating an exploitable condition that can be leveraged by remote attackers to gain unauthorized access to system resources or execute malicious code. The flaw affects Java versions 5.0 Update 17 and earlier, 6 Update 12 and earlier, 1.4.2_19 and earlier, and 1.3.1_24 and earlier, indicating a widespread impact across the Java ecosystem at the time of discovery. The vulnerability is particularly concerning as it enables attackers to manipulate memory structures through crafted malicious GIF files, potentially leading to complete system compromise.
The technical exploitation of this buffer overflow occurs when the Java runtime environment processes a specially crafted GIF image file that contains malformed data structures. When the Java graphics library attempts to parse the image, it fails to properly validate the buffer sizes of various image components, leading to memory corruption that can be exploited to overwrite adjacent memory locations. This type of vulnerability maps directly to CWE-121, which describes heap-based buffer overflow conditions where insufficient bounds checking allows attackers to write beyond allocated memory boundaries. The attack vector leverages the Java platform's image processing capabilities, specifically targeting the GIF decoder implementation that handles image metadata and pixel data structures. The vulnerability can be triggered remotely through web-based attacks, making it particularly dangerous in web browser environments where users may unknowingly encounter malicious GIF files.
The operational impact of CVE-2009-1098 extends beyond simple privilege escalation or arbitrary code execution to encompass potential data theft, system compromise, and denial of service conditions. Attackers can leverage this vulnerability to access sensitive files on the target system, potentially gaining access to user credentials, personal data, or corporate information stored in the system's file structure. The remote nature of the attack means that exploitation can occur without requiring physical access to the target system, making it particularly dangerous for enterprise environments where Java applications are frequently accessed through web interfaces. This vulnerability directly aligns with ATT&CK technique T1059.007, which covers scripting languages, as attackers can use the compromised Java environment to execute malicious scripts or commands. The impact is amplified in enterprise settings where Java applications are commonly used for web applications, desktop applications, and server-side processing, creating multiple potential attack surfaces.
Mitigation strategies for CVE-2009-1098 require immediate patching of affected Java versions to address the buffer overflow condition in the GIF image processing libraries. Organizations should prioritize updating to patched versions of Java SE, specifically ensuring that all systems running Java 5.0 through 6.0 are updated beyond the affected release versions mentioned in the vulnerability description. System administrators should implement network-level controls to restrict access to potentially malicious image files and consider disabling Java plugin execution in web browsers for users who do not require Java-based applications. The vulnerability demonstrates the importance of input validation and bounds checking in system security, particularly in libraries that process untrusted data from external sources. Security monitoring should include detection of unusual Java process behavior and memory access patterns that may indicate exploitation attempts. Additionally, organizations should conduct comprehensive vulnerability assessments to identify all systems running affected Java versions and ensure proper patch management procedures are in place to prevent similar vulnerabilities from being exploited in the future.