CVE-2017-17315 in DP300
Summary
by MITRE
Huawei DP300 V500R002C00; RP200 V600R006C00; TE30 V100R001C10; V500R002C00; V600R006C00; TE40 V500R002C00; V600R006C00; TE50 V500R002C00; V600R006C00; TE60 V100R001C10; V500R002C00; V600R006C00 have a numeric errors vulnerability. An unauthenticated, remote attacker may send specially crafted SCCP messages to the affected products. Due to the improper validation of the messages, it will cause numeric errors when handling the messages. Successful exploit will cause some services abnormal.
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Analysis
by VulDB Data Team • 03/17/2023
The vulnerability identified as CVE-2017-17315 affects multiple Huawei communication devices including DP300, RP200, TE30, TE40, TE50, and TE60 models across various firmware versions. This numeric errors vulnerability represents a critical security flaw that allows unauthenticated remote attackers to compromise system stability through specially crafted SCCP (Skinny Client Control Protocol) messages. The affected products operate within enterprise communication environments where reliable service availability is paramount for business operations. The vulnerability stems from inadequate input validation mechanisms within the SCCP message processing framework, creating a pathway for malicious actors to disrupt normal service operations without requiring authentication credentials.
The technical implementation of this vulnerability involves improper validation of numeric fields within SCCP protocol messages that traverse the network to affected Huawei devices. When these devices receive malformed or specially crafted SCCP messages containing numeric values outside expected parameters, the system's handling mechanisms fail to properly process these inputs. This failure manifests as numeric errors during message processing, which can lead to system instability, service degradation, or complete service outages. The vulnerability specifically targets the protocol parsing logic that manages SCCP message structures, where numeric fields such as message lengths, sequence numbers, or device identifiers are not adequately validated against acceptable ranges or formats. This weakness creates a condition where the system's arithmetic operations become compromised, leading to unexpected behavior patterns that ultimately result in abnormal service conditions.
The operational impact of CVE-2017-17315 extends beyond simple service disruption to potentially compromise entire communication infrastructures within affected organizations. Attackers can exploit this vulnerability remotely without authentication, making it particularly dangerous for enterprise environments where communication systems are critical for business continuity. The numeric errors can cause cascading failures within the device's processing pipeline, leading to unpredictable behavior that may manifest as intermittent service interruptions, complete system crashes, or denial of service conditions. Organizations relying on these Huawei communication devices for voice and video conferencing services face significant operational risks, as the vulnerability can be exploited to disrupt critical business communications without detection. The remote nature of the exploit means that attackers can target these devices from external networks, potentially affecting organizations with limited network segmentation controls.
Mitigation strategies for this vulnerability should focus on implementing network-level protections and firmware updates to address the underlying numeric validation flaws. Organizations should deploy network segmentation measures to limit access to affected devices and implement intrusion detection systems to monitor for anomalous SCCP traffic patterns. The most effective remediation involves applying official Huawei security patches that address the numeric validation issues within the SCCP message handling code. Security teams should also consider implementing traffic filtering rules that can identify and block malformed SCCP messages before they reach vulnerable devices. Additionally, regular security assessments of communication infrastructure should include testing for similar numeric validation vulnerabilities across all networked devices. The vulnerability aligns with CWE-191, which describes integer underflow and overflow conditions, and represents a specific implementation weakness that could be categorized under ATT&CK technique T1203 for legitimate credentials, though in this case the exploit requires no authentication. Network administrators should also establish monitoring procedures to detect unusual service behavior patterns that may indicate exploitation attempts, as the numeric errors may not always result in complete system failures but could still impact service quality.