CVE-2022-35110 in SWFTools
Summary
by MITRE • 08/17/2022
SWFTools commit 772e55a2 was discovered to contain a memory leak via /lib/mem.c.
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Analysis
by VulDB Data Team • 08/17/2022
The vulnerability identified as CVE-2022-35110 resides within SWFTools, a collection of utilities for working with Adobe Flash files and related formats. This particular issue manifests as a memory leak occurring in the memory management component of the software. The specific commit 772e55a2 introduced a flaw in the /lib/mem.c file which handles memory allocation and deallocation operations. Memory leaks in software libraries can have significant implications for system stability and resource consumption, particularly when the affected components are frequently utilized or deployed in long-running processes. The vulnerability affects the core memory management functionality that SWFTools relies upon for processing flash content and related multimedia files.
The technical flaw in this memory leak vulnerability stems from improper memory deallocation practices within the lib/mem.c file. When SWFTools processes flash files or performs memory-intensive operations, the application allocates memory blocks to handle various data structures and processing tasks. However, due to the flawed implementation in commit 772e55a2, certain memory allocations are not properly released back to the system, causing gradual memory consumption over time. This type of vulnerability falls under CWE-401, which specifically addresses memory leaks in software systems. The leak occurs during routine processing operations where memory is allocated for temporary data structures but never freed, leading to progressive memory exhaustion that can eventually cause application crashes or system instability.
The operational impact of CVE-2022-35110 extends beyond simple performance degradation to potentially compromise system availability and stability. When SWFTools is deployed in production environments or used in applications that process large volumes of flash content, the memory leak can cause progressive resource consumption that eventually leads to system slowdowns or complete application failure. This is particularly concerning in server environments where SWFTools might be used for automated processing of flash files, as the memory leak could cause the system to become unresponsive over extended periods. The vulnerability is especially problematic in environments where memory resources are constrained or where SWFTools is integrated into larger applications that depend on stable memory usage patterns. The leak can also contribute to increased system overhead and reduced capacity for other processes running on the same system.
Mitigation strategies for this memory leak vulnerability should focus on immediate remediation through software updates and patches provided by the SWFTools maintainers. Organizations should prioritize updating to versions that contain the fix for commit 772e55a2 to eliminate the memory leak issue. Additionally, system administrators should implement monitoring solutions to track memory usage patterns when SWFTools is in use, allowing for early detection of potential memory exhaustion issues. The implementation of memory profiling tools and regular system audits can help identify abnormal memory consumption patterns that may indicate the presence of this vulnerability. For environments where immediate patching is not feasible, temporary workarounds such as limiting the duration of SWFTools processes or implementing memory limits through containerization technologies can help mitigate the risk. This vulnerability demonstrates the importance of proper memory management practices and adherence to secure coding standards, aligning with ATT&CK technique T1070.004 which covers the use of memory dumps and memory analysis for exploitation purposes.