CVE-2022-30913 in Magic R100
Summary
by MITRE • 06/08/2022
H3C Magic R100 R100V100R005 was discovered to contain a stack overflow vulnerability via the ipqos_set_bandwidth parameter at /goform/aspForm.
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Analysis
by VulDB Data Team • 06/11/2022
The vulnerability identified as CVE-2022-30913 affects H3C Magic R100 R100V100R005 networking equipment, representing a critical stack overflow flaw that can be exploited through the ipqos_set_bandwidth parameter within the /goform/aspForm endpoint. This issue resides in the web-based management interface of the device, making it accessible through standard HTTP communications. The vulnerability stems from insufficient input validation and bounds checking within the parameter handling mechanism, allowing malicious actors to craft specially crafted payloads that exceed the allocated stack buffer space. The affected device operates with a web server component that processes form submissions without proper sanitization of user-supplied data, creating an exploitable condition that can lead to arbitrary code execution or system crashes. This vulnerability is particularly concerning as it affects network infrastructure devices that are often deployed in enterprise environments and may be accessible from untrusted networks.
The technical exploitation of this stack overflow vulnerability follows the typical pattern of buffer overrun attacks where an attacker can manipulate the ipqos_set_bandwidth parameter to inject excessive data into a fixed-length buffer allocated on the stack. When the device processes this malformed input, the excessive data overflows into adjacent memory locations, potentially corrupting critical program execution data such as return addresses or function pointers. This memory corruption can result in the web server process crashing or, more dangerously, allow attackers to redirect program execution flow to malicious code injected into the stack. The vulnerability is classified under CWE-121 Stack-based Buffer Overflow, which represents a fundamental weakness in memory management where data written to a buffer exceeds the buffer's capacity. The attack vector is particularly dangerous as it requires no authentication for exploitation, making it an attractive target for remote attackers who can leverage the vulnerability from outside the network perimeter.
The operational impact of CVE-2022-30913 extends beyond simple service disruption to potentially enable complete system compromise of the affected H3C Magic R100 devices. An attacker who successfully exploits this vulnerability could gain unauthorized access to the device's management interface, potentially leading to complete control over network traffic shaping and quality of service configurations. This compromise could result in man-in-the-middle attacks, traffic redirection, or the ability to disrupt network services for legitimate users. The vulnerability's presence in a network infrastructure device means that exploitation could affect multiple network segments and potentially provide a foothold for further lateral movement within the network. According to ATT&CK framework, this vulnerability maps to T1210 Exploitation of Remote Services and T1078 Valid Accounts, as it enables unauthorized access to network devices through unauthenticated exploitation of web-based management interfaces. The device's role in network traffic management makes this vulnerability particularly dangerous as it could allow attackers to manipulate QoS settings to prioritize malicious traffic or deny service to legitimate network users.
Mitigation strategies for CVE-2022-30913 should focus on immediate patching of the affected firmware version, as H3C has released updates addressing this specific vulnerability. Organizations should implement network segmentation to isolate critical network infrastructure from untrusted networks and disable unnecessary web management services where possible. Network monitoring should be enhanced to detect anomalous traffic patterns that might indicate exploitation attempts, particularly around the /goform/aspForm endpoint. Access controls should be strengthened through the implementation of multi-factor authentication and network access control lists that restrict access to management interfaces to trusted IP addresses only. The vulnerability demonstrates the importance of input validation and proper memory management in embedded web applications, highlighting the need for security testing of network device firmware and regular vulnerability assessments. Organizations should also consider implementing intrusion detection systems that can identify exploitation attempts targeting known web application vulnerabilities and maintain detailed network logs for forensic analysis should an incident occur. Given the nature of the vulnerability and its potential for remote code execution, immediate remediation is essential to prevent exploitation by threat actors who may be actively scanning for this specific weakness in network infrastructure devices.