CVE-2022-26437 in MT2621
Summary
by MITRE • 08/01/2022
In httpclient, there is a possible out of bounds write due to uninitialized data. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WSAP00103831; Issue ID: WSAP00103831.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 08/29/2022
The vulnerability identified as CVE-2022-26437 represents a critical out-of-bounds write flaw within the httpclient component that poses significant security risks to affected systems. This issue stems from the improper handling of uninitialized data during network communication processes, creating potential attack vectors that could be exploited remotely without requiring any additional privileges or user interaction. The flaw specifically affects the httpclient library implementation and demonstrates how seemingly minor data handling issues can result in severe privilege escalation capabilities.
The technical root cause of this vulnerability lies in the improper initialization of memory buffers within the httpclient processing pipeline. When the library handles incoming network data, it fails to properly initialize certain memory regions before writing data to them, creating opportunities for out-of-bounds memory writes. This type of vulnerability falls under the CWE-457 category of "Use of Uninitialized Variable" and represents a classic example of memory safety issues that can be exploited to manipulate program execution flow. The uninitialized data can contain arbitrary values that, when written beyond allocated buffer boundaries, may overwrite adjacent memory locations containing critical program state information.
From an operational impact perspective, this vulnerability creates a severe threat landscape where attackers can achieve remote privilege escalation without requiring any user interaction or additional execution privileges. The lack of user interaction requirements significantly increases the exploitability of this flaw, making it particularly dangerous in environments where network services are exposed to untrusted networks. Attackers can leverage this vulnerability to gain elevated privileges on affected systems, potentially leading to complete system compromise and unauthorized access to sensitive data or resources. The vulnerability's classification as a remote privilege escalation issue aligns with ATT&CK technique T1068 which covers "Exploitation for Privilege Escalation" and demonstrates how memory corruption flaws can be weaponized for system compromise.
The patch ID WSAP00103831 specifically addresses this vulnerability through memory initialization improvements and buffer boundary checks within the httpclient implementation. Organizations should prioritize applying this patch as part of their vulnerability management processes, particularly in environments where httpclient components are actively processing network traffic from untrusted sources. Security teams should also implement network monitoring to detect potential exploitation attempts targeting this specific vulnerability. The remediation approach involves ensuring proper memory initialization practices and implementing robust input validation mechanisms to prevent similar issues from occurring in other components of the system architecture. This vulnerability highlights the importance of following secure coding practices and adhering to memory safety standards that prevent buffer overflows and related memory corruption issues that can lead to privilege escalation attacks.