CVE-2017-17316 in DP300
Summary
by MITRE
Huawei DP300 V500R002C00; RP200 V500R002C00; V600R006C00; TE30 V100R001C10; V500R002C00; V600R006C00; TE40 V500R002C00; V600R006C00; TE50 V500R002C00; V600R006C00; TE60 V100R001C10; V500R002C00; V600R006C00 have an out-of-bounds read vulnerability. An unauthenticated, remote attacker has to control the peer device and craft the Signalling Connection Control Part (SCCP) messages to the target devices. Due to insufficient input validation of some values in the messages, successful exploit will cause out-of-bounds read and some services abnormal.
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Analysis
by VulDB Data Team • 03/29/2023
This vulnerability affects multiple Huawei communication devices including DP300, RP200, TE30, TE40, TE50, and TE60 series across various firmware versions. The out-of-bounds read flaw exists within the handling of Signalling Connection Control Part messages which are part of the telecommunications signaling protocols used for establishing and managing connections. The vulnerability stems from inadequate input validation mechanisms that fail to properly check the boundaries of received SCCP message parameters, allowing malicious actors to craft specially crafted messages that trigger memory access violations.
The technical implementation of this vulnerability involves the processing of SCCP (Signalling Connection Control Part) messages which are fundamental components of the ITU-T Q.763 and Q.765 signaling protocols used in telecommunication networks. When these devices receive specially crafted SCCP messages containing malformed or oversized parameters, the system fails to validate the input boundaries before processing, leading to memory access beyond allocated buffer limits. This type of vulnerability is classified as a CWE-125 Out-of-bounds Read according to the Common Weakness Enumeration catalog, which specifically addresses situations where software reads data past the end of a buffer or array. The vulnerability is particularly concerning as it requires no authentication and can be exploited remotely, making it a significant threat vector for network-based attacks.
The operational impact of this vulnerability extends beyond simple service disruption to potentially enable more sophisticated attack vectors within the targeted network infrastructure. Successful exploitation can cause abnormal service behavior including system instability, application crashes, and potential information disclosure through memory content exposure. From an attacker perspective, this vulnerability aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter and T1046 for Network Service Scanning, as it allows for the establishment of persistent access points through network-based signaling manipulation. The affected devices operate in enterprise and industrial network environments where communication reliability is paramount, making such vulnerabilities particularly dangerous as they can compromise the integrity of critical telecommunication services.
Mitigation strategies for this vulnerability should include immediate firmware updates from Huawei to address the input validation gaps in SCCP message handling. Network administrators should implement strict filtering of SCCP messages at network perimeters using firewalls and intrusion detection systems to prevent malformed signaling traffic from reaching target devices. The implementation of network segmentation can help limit the potential impact of successful exploitation by isolating critical communication infrastructure. Additionally, monitoring for unusual signaling patterns and implementing robust logging mechanisms for SCCP message processing will aid in early detection of potential exploitation attempts. Security teams should also consider disabling unnecessary signaling protocols when not required for operations and conduct regular vulnerability assessments targeting telecommunication infrastructure to identify similar input validation weaknesses that may exist in other network components.