CVE-2022-25457 : Vulnerability Insights and Analysis

This article provides insights into CVE-2022-25457, a vulnerability found in Tenda AC6 routers that poses a security risk due to a stack overflow issue.

Understanding CVE-2022-25457

CVE-2022-25457 involves a stack overflow vulnerability in Tenda AC6 routers, specifically in the SetSysTimeCfg function via the ntpserver parameter.

What is CVE-2022-25457?

The CVE-2022-25457 vulnerability affects Tenda AC6 routers with version v15.03.05.09_multi, allowing attackers to exploit a stack overflow via the ntpserver parameter in the SetSysTimeCfg function.

The Impact of CVE-2022-25457

This vulnerability could potentially enable remote attackers to execute arbitrary code or cause a denial of service (DoS) by sending malicious requests to the affected routers.

Technical Details of CVE-2022-25457

CVE-2022-25457 details include:

Vulnerability Description

Tenda AC6 v15.03.05.09_multi routers are susceptible to a stack overflow due to improper validation of user-supplied input in the ntpserver parameter of the SetSysTimeCfg function.

Affected Systems and Versions

The issue impacts Tenda AC6 routers running the v15.03.05.09_multi firmware version.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted requests containing overly long data to the ntpserver parameter, causing a stack overflow and potentially leading to unauthorized code execution.

Mitigation and Prevention

Protecting systems from CVE-2022-25457 involves the following steps:

Immediate Steps to Take

Update Tenda AC6 routers to a patched firmware version that addresses the stack overflow vulnerability.
Implement network segmentation to minimize the impact of potential attacks targeting the router.

Long-Term Security Practices

Regularly monitor for firmware updates and apply them promptly to ensure that security patches are in place.
Configure firewall rules to restrict access to the router's administrative interface.

Patching and Updates

Tenda or the respective vendor of the affected routers should release security patches addressing the CVE-2022-25457 vulnerability to mitigate the risk of exploitation and enhance overall system security.