CVE-2023-42750 in SC7731E
Summary
by MITRE • 11/01/2023
In gnss service, there is a possible out of bounds write due to a missing bounds check. This could lead to local denial of service with System execution privileges needed
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 11/29/2023
The vulnerability identified as CVE-2023-42750 resides within the gnss service component, representing a critical out-of-bounds write flaw that stems from insufficient input validation mechanisms. This issue manifests when the service processes incoming data without proper bounds checking, creating an opportunity for memory corruption that can be exploited by malicious actors. The vulnerability specifically affects systems where the gnss service operates with system execution privileges, making it particularly dangerous as it requires minimal escalation to achieve significant impact.
The technical nature of this flaw aligns with CWE-787, which defines out-of-bounds write conditions that occur when code attempts to write data beyond the boundaries of a fixed-length buffer or array. In the context of gnss service operations, this typically involves processing satellite navigation data streams where malformed or excessively long input packets could trigger the vulnerability. The missing bounds check implies that the service does not validate the length or content of incoming data before attempting to store it in allocated memory segments, creating a direct pathway for memory corruption.
From an operational perspective, this vulnerability presents a significant risk for local denial of service attacks, as an attacker with access to the system can leverage this flaw to crash the gnss service and potentially the entire system if the service is critical to system operation. The requirement for system execution privileges indicates that the attack vector likely involves either direct system access or exploitation of a privilege escalation vulnerability that allows an attacker to elevate their privileges to system level. This makes the attack surface more constrained but also more impactful when successful.
The potential impact extends beyond simple service disruption, as the gnss service typically provides critical positioning and timing data that many system components depend upon. When compromised, this vulnerability could lead to cascading failures in systems relying on accurate satellite navigation data, affecting applications ranging from telecommunications networks to critical infrastructure systems. The vulnerability's classification as a local denial of service means that exploitation requires local system access, but the system execution privileges required indicate that once an attacker has achieved this level of access, the impact can be severe.
Mitigation strategies should focus on implementing comprehensive input validation and bounds checking mechanisms within the gnss service codebase. The most effective approach involves adding proper length validation before any memory allocation or data processing occurs, ensuring that all input data conforms to expected parameters before being processed. Additionally, implementing memory safety features such as stack canaries, address space layout randomization, and heap metadata protection can provide additional defense-in-depth measures. Regular code reviews and static analysis should be conducted to identify similar patterns that could lead to analogous vulnerabilities. The ATT&CK framework categorizes this type of vulnerability under T1059.001 for command and scripting interpreter, as exploitation may involve crafting malicious input to trigger the out-of-bounds write condition. System administrators should also consider implementing monitoring solutions that can detect anomalous data processing patterns that might indicate exploitation attempts, particularly in environments where gnss services are critical to operations.