A critical buffer overflow vulnerability in the UTT HiPER 810G router allows authenticated attackers to cause memory corruption and potential system instability.

The vulnerability is a stack-based buffer overflow located in the strcpy function within the /goform/setSysAdm file. An authenticated attacker with administrative privileges can send a maliciously crafted passwd1 parameter to trigger this memory corruption.

Successful exploitation of this vulnerability can lead to a denial of service, effectively taking the network device offline and disrupting business operations. While the attack requires administrative authentication, the potential for total system impact as indicated by the CVSS score of 7.2 necessitates prompt attention to prevent unauthorized service disruption and maintain the integrity of the network infrastructure.

Immediate Action: Contact UTT support or monitor the official vendor download center for firmware updates that address this buffer overflow. If no patch is currently available, restrict administrative access to the management interface to trusted personnel only.

Proactive Monitoring: Monitor device logs for unusual POST requests directed at the /goform/setSysAdm endpoint, particularly those containing excessively long strings in the passwd1 parameter.

Compensating Controls: Implement strict access control lists (ACLs) to limit access to the router management interface to specific, known management IP addresses, thereby reducing the exposure to potential attackers.

Public Exploit Available: Yes, a proof-of-concept exploit exists and is detailed in the researcher write-up published on GitHub.

Given the availability of a public proof-of-concept and the potential for system-wide denial of service, this vulnerability presents a significant risk to network availability. Organizations should prioritize securing the administrative interface of their UTT HiPER 810G routers and apply the necessary firmware updates as soon as they are released by the vendor.