CVE-2024-22751 in DIR-882
Summary
by MITRE • 01/24/2024
D-Link DIR-882 DIR882A1_FW130B06 was discovered to contain a stack overflow via the sub_477AA0 function.
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Analysis
by VulDB Data Team • 02/18/2024
The vulnerability identified as CVE-2024-22751 affects D-Link DIR-882 routers running firmware version DIR882A1_FW130B06 and potentially other variants within the same product line. This issue represents a critical stack overflow condition that arises from improper input validation within the device's web interface handling code. The vulnerability manifests specifically through the sub_477AA0 function, which processes user-supplied data without adequate bounds checking or sanitization measures. Such flaws typically occur when developers fail to validate the length or content of incoming data before processing it on the stack, creating an exploitable condition that can be leveraged by remote attackers to execute arbitrary code on the affected device.
The technical implementation of this vulnerability stems from a classic buffer overflow scenario where the sub_477AA0 function does not properly validate the size of input parameters before copying them into fixed-size stack buffers. This flaw allows an attacker to overwrite adjacent stack memory locations, potentially corrupting program execution flow and enabling code execution privileges. The attack vector is remote and authenticated, meaning that an attacker must first establish a valid session with the device, though this requirement may be bypassed in some implementations. The vulnerability falls under CWE-121 Stack-based Buffer Overflow, which is classified as a high-severity issue in the Common Weakness Enumeration catalog due to its potential for arbitrary code execution and system compromise.
The operational impact of CVE-2024-22751 extends beyond simple device compromise, as successful exploitation could provide attackers with complete administrative control over the affected router. This includes the ability to modify network configurations, establish persistent backdoors, redirect traffic through malicious servers, or use the device as a pivot point for further attacks within the local network. The compromised device could become part of a botnet, or attackers might leverage it to perform man-in-the-middle attacks against connected devices, making this vulnerability particularly dangerous in enterprise or residential gateway environments. The attack surface is significant as routers serve as primary network gateways, making them attractive targets for cybercriminals seeking to establish persistent access to network infrastructure.
Mitigation strategies for this vulnerability should prioritize immediate firmware updates from D-Link, as the vendor has likely released patches addressing this specific stack overflow condition. Network segmentation and access control measures should be implemented to limit exposure of affected devices to untrusted networks, while monitoring systems should be deployed to detect anomalous behavior that might indicate exploitation attempts. Security professionals should also consider implementing network intrusion detection systems that can identify crafted packets designed to trigger the buffer overflow condition, and organizations should conduct comprehensive vulnerability assessments to identify other potentially affected D-Link devices within their infrastructure. The remediation process aligns with ATT&CK technique T1072 Application Deployment Software, as the exploitation requires modification of device firmware to achieve persistent access. Additionally, the vulnerability demonstrates characteristics consistent with T1210 Exploitation of Remote Services, as the attack leverages network-accessible web interfaces to deliver malicious payloads.