CVE-2022-48462 in SC7731E
Summary
by MITRE • 12/04/2023
In wifi service, there is a possible out of bounds write due to a missing bounds check. This could lead to local denial of service with no additional execution privileges needed
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Analysis
by VulDB Data Team • 12/22/2023
The vulnerability identified as CVE-2022-48462 resides within the wifi service component of a system, representing a critical out-of-bounds write flaw that stems from inadequate input validation mechanisms. This issue manifests when the wifi service processes incoming data without proper bounds checking, creating an opportunity for memory corruption that can be exploited by local attackers. The vulnerability is particularly concerning because it requires no additional execution privileges to exploit, making it accessible to any user with local system access. The missing bounds check typically occurs when the service fails to validate the size or length of data before attempting to write it to allocated memory regions, potentially allowing an attacker to overwrite adjacent memory locations with arbitrary data.
The technical nature of this vulnerability aligns with CWE-787, which specifically addresses out-of-bounds write conditions in software systems. When an attacker crafts malicious input that exceeds expected data boundaries, the wifi service may attempt to write data beyond the allocated buffer space, potentially corrupting adjacent memory segments. This memory corruption can result in unpredictable behavior including application crashes, system instability, or in more severe cases, arbitrary code execution depending on the memory layout and the specific data being overwritten. The local privilege requirement means that an attacker does not need elevated permissions to trigger the vulnerability, as the flaw exists within a service that operates with standard user privileges. From an attack perspective, this vulnerability maps to ATT&CK technique T1068, which involves exploiting local system privileges to gain unauthorized access to system resources.
The operational impact of CVE-2022-48462 extends beyond simple denial of service, as the potential for memory corruption could lead to more severe consequences including system instability or data integrity issues. When the wifi service experiences an out-of-bounds write, the immediate effect is typically a service crash or restart, disrupting network connectivity for users who rely on wireless services. However, the broader implications include the possibility of creating persistent system vulnerabilities that could be leveraged by more sophisticated attacks. The vulnerability's local nature means that any user with access to the system can potentially trigger the flaw, making it particularly dangerous in multi-user environments where privilege escalation might be possible through other attack vectors. Network administrators must consider that this vulnerability could be part of a broader exploitation chain, where local access leads to further privilege escalation or lateral movement within a network infrastructure. The impact is further amplified by the fact that wifi services are often critical components in enterprise and consumer environments, where service availability directly affects user productivity and system functionality. Mitigation strategies should focus on implementing proper bounds checking mechanisms, regular security updates, and monitoring for unusual network service behavior that might indicate exploitation attempts.