Horizon Alert
Summary of the vulnerability and why it matters
The Zserv Handler component in Shibby Tomato firmware contains a vulnerability within its IPv4 reading function. This flaw allows for a stack-based buffer overflow to be triggered through manipulation. An attacker could exploit this remotely to affect the integrity and availability of the system.
- Vulnerable function rip_zebra_read_ipv4
- Stack-based buffer overflow
- System compromise and data loss
Attack Path
How an attacker could exploit the issue
This vulnerability could allow an attacker to execute arbitrary code by exploiting a stack-based buffer overflow in the Zserv Handler component. The attack is remotely executable and has been publicly disclosed. Organizations using unsupported versions of Shibby Tomato are at risk.
- Exposure condition: Network accessible function.
- Attacker starting point: Unauthenticated network access.
- Trigger and result: Trigger overflow for code execution.
Live Threat
Current exploitation, exposure, and threat context
A vulnerability in the Zserv Handler component of Shibby Tomato firmware could allow for remote attacks leading to a stack-based buffer overflow. This could impact system integrity and availability if exploited. The exploit details have been publicly disclosed, increasing the potential for its utilization. However, this vulnerability only affects products that are no longer supported by their maintainer and have been superseded by FreshTomato.
- Likely attacker skill level: Low
- Required access or conditions: Remote, no privileges needed
- Business risk or urgency: Low, unsupported product
Operational Fix
Recommended remediation, mitigation, and detection steps
A vulnerability has been publicly disclosed in Shibby Tomato firmware up to version 1.28, affecting the Zserv Handler component. This flaw, an overflow in the rip_zebra_read_ipv4 function, could allow for remote attacks, potentially impacting system integrity and availability. Given that this vulnerability affects products no longer supported by their maintainer, organizations should prioritize identifying and mitigating the risk to any remaining affected systems.
- Find affected devices running this firmware.
- Isolate or disable affected services.
- Plan for firmware replacement.
