CVE-2025-20653 in MT6781
Summary
by MITRE • 03/03/2025
In da, there is a possible out of bounds read due to an integer overflow. This could lead to local information disclosure, if an attacker has physical access to the device, with no additional execution privileges needed. User interaction is needed for exploitation. Patch ID: ALPS09291064; Issue ID: MSV-2046.
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Analysis
by VulDB Data Team • 03/20/2025
The vulnerability identified as CVE-2025-20653 resides within the da component where an integer overflow condition creates a potential out of bounds read scenario. This flaw originates from improper handling of integer arithmetic operations that can cause unsigned integer values to wrap around when exceeding their maximum representable value. The vulnerability is classified under CWE-191 as an integer underflow or overflow, specifically manifesting as an unsigned integer overflow that results in unexpected behavior during memory access operations. The integer overflow occurs during buffer size calculations or index computations where the result exceeds the maximum value that can be represented by the data type, leading to a situation where memory locations outside the intended buffer boundaries may be accessed.
The exploitation of this vulnerability requires physical access to the target device and user interaction to initiate the malicious sequence. This attack vector places the vulnerability in the context of local privilege escalation scenarios where an attacker with physical possession of the device can leverage the out of bounds read to extract sensitive information from memory locations. The attack model aligns with ATT&CK technique T1059.001 for command and scripting interpreter and T1068 for exploit for privilege escalation, as the vulnerability can be used to extract information that may reveal system state or credentials stored in memory. The requirement for user interaction suggests that the exploit must be triggered through normal user activities such as opening specific files or interacting with certain applications that utilize the vulnerable da component.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially enable more sophisticated attacks. Local information disclosure can reveal sensitive data such as cryptographic keys, authentication tokens, or system configuration details that could be leveraged for further exploitation. Memory access patterns that result from the out of bounds read may expose uninitialized memory regions or data from other processes running on the same system. This information disclosure capability can be particularly dangerous in environments where the device operates with elevated privileges or handles sensitive data. The vulnerability affects systems where the da component is actively utilized for device management or system monitoring functions, potentially compromising the integrity of the device's security posture. The patch ID ALPS09291064 indicates this is a Linux kernel or embedded system vulnerability that requires specific kernel-level fixes to address the integer overflow condition and prevent the subsequent memory access violations.
Mitigation strategies should focus on implementing proper integer overflow checks and bounds validation within the da component. The recommended approach involves adding explicit range checks before any arithmetic operations that could result in integer overflow conditions, as well as implementing proper input validation for all parameters that influence buffer calculations. System administrators should prioritize applying the patch ALPS09291064 as soon as possible to prevent exploitation attempts. Additional defensive measures include implementing memory protection mechanisms such as stack canaries, address space layout randomization, and code integrity checks that can detect and prevent exploitation attempts. The vulnerability demonstrates the importance of robust input validation and proper arithmetic handling in security-critical code sections, particularly in embedded systems where physical access vulnerabilities are more prevalent. Organizations should also consider implementing monitoring solutions that can detect anomalous memory access patterns that may indicate exploitation attempts against similar integer overflow vulnerabilities.