ChangingTec MegaServiSignAdapter - Out-of-bounds Read

Vulnerability

The ChangingTech MegaServiSignAdapter component (Windows version 1.0.17.0823) contains an out-of-bounds read vulnerability. The component fails to validate the length of parameters passed to a specific function, allowing an attacker to read beyond the intended buffer boundaries [1].

Exploitation

An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted request to the affected component. No authentication or user interaction is required. The attacker can trigger the out-of-bounds read by providing a parameter with an unexpected length [1].

Impact

Successful exploitation allows the attacker to read partial sensitive content from the victim's memory, potentially leaking confidential data. Additionally, the out-of-bounds read can cause partial service disruption, affecting the availability of the component [1].

Mitigation

The vendor has released version 1.0.22.1004 of MegaServiSignAdapter for Windows, which fixes the vulnerability. Users should upgrade to this version or later. The fix was published on 2023-01-31 [1].