CVE-2017-17281 in DP300
Summary
by MITRE
SFTP module in Huawei DP300 V500R002C00; RP200 V600R006C00; TE30 V100R001C10; V500R002C00; V600R006C00; TE40 V500R002C00; V600R006C00; TE50 V500R002C00; V600R006C00; TE60 V100R001C10; V500R002C00; V600R006C00 has an out-of-bounds read vulnerability. A remote, authenticated attacker could exploit this vulnerability by sending specially crafted messages to a target device. Successful exploit may cause some information leak.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 02/21/2023
The vulnerability identified as CVE-2017-17281 affects the SFTP module across multiple Huawei communication devices including DP300, RP200, TE30, TE40, TE50, and TE60 series. This out-of-bounds read flaw exists within the Secure File Transfer Protocol implementation that handles file operations between networked devices. The vulnerability specifically impacts devices running firmware versions V500R002C00 and V600R006C00 across various product lines. The flaw represents a critical security weakness that allows unauthorized information disclosure through improper memory access handling during SFTP operations.
The technical implementation of this vulnerability stems from insufficient input validation within the SFTP module's message processing routines. When authenticated attackers send specially crafted SFTP protocol messages to affected devices, the system fails to properly bounds-check memory access operations. This memory corruption occurs during the parsing of SFTP command sequences where the software attempts to read data beyond allocated memory boundaries. The vulnerability is classified under CWE-125 as an out-of-bounds read, which allows attackers to access memory locations that should remain protected. The flaw operates at the protocol level where malformed SFTP packets can trigger memory access violations that expose sensitive information.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially enable more sophisticated attacks. An authenticated remote attacker can leverage this weakness to extract sensitive data from the device's memory including configuration parameters, user credentials, or system information that could aid in further exploitation. The vulnerability affects devices that rely on SFTP for secure file transfers, making it particularly dangerous for enterprise environments where these devices handle confidential communications. The exposure of system memory contents could reveal internal network structures, device configurations, or authentication tokens that would otherwise remain protected. This vulnerability aligns with ATT&CK technique T1005 for data from local system and T1041 for exfiltration, as it enables unauthorized data access and potential information leakage.
Mitigation strategies for CVE-2017-17281 should prioritize immediate firmware updates from Huawei to address the memory bounds-checking issue. Organizations should implement network segmentation to limit access to affected devices and restrict SFTP access to authorized personnel only. Network monitoring should be enhanced to detect unusual SFTP traffic patterns that might indicate exploitation attempts. The vulnerability demonstrates the importance of proper input validation in network protocol implementations and highlights the need for regular security assessments of embedded systems. Security teams should also consider implementing additional access controls and authentication mechanisms to reduce the attack surface. Device administrators should regularly review SFTP access logs and monitor for unauthorized connections that could indicate exploitation attempts. The vulnerability serves as a reminder of the critical importance of memory safety in embedded systems and the potential consequences of insufficient bounds checking in protocol implementations.