CVE-2017-15342 in DP300
Summary
by MITRE
Huawei DP300 V500R002C00, TE60 V600R006C00, TP3106 V100R002C00, eSpace U1981 V200R003C30SPC100 have a denial of service vulnerability. The software does not correctly calculate the rest size in a buffer when handling SSL connections. A remote unauthenticated attacker could send a lot of crafted SSL messages to the device, successful exploit could cause no space in the buffer and then denial of service.
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Analysis
by VulDB Data Team • 02/08/2023
The vulnerability identified as CVE-2017-15342 affects multiple Huawei communication devices including DP300 V500R002C00, TE60 V600R006C00, TP3106 V100R002C00, and eSpace U1981 V200R003C30SPC100. This issue represents a critical buffer management flaw that manifests during SSL connection handling processes. The vulnerability stems from improper calculation of remaining buffer space when processing SSL protocol messages, creating a condition where the system fails to accurately track available memory resources during cryptographic operations. The flaw specifically impacts the device's ability to maintain proper buffer boundaries when processing incoming SSL traffic, leading to potential memory exhaustion scenarios.
From a technical perspective, this vulnerability operates as a buffer overflow condition within the SSL processing stack of these devices. The improper buffer size calculation allows an attacker to craft specially formatted SSL messages that consume available buffer space more rapidly than the system can manage. This mismanagement occurs during the SSL handshake and data transmission phases, where the device fails to properly validate or account for the actual space requirements of incoming SSL packets. The vulnerability is classified under CWE-129 as an improper validation of the length of a buffer, which directly relates to the buffer size calculation error. The flaw enables a remote unauthenticated attacker to exploit the system without requiring any credentials or prior access to the network infrastructure.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise the entire communication infrastructure of affected organizations. When successfully exploited, the vulnerability results in complete denial of service conditions where the targeted devices become unresponsive and unable to process legitimate SSL connections. This can lead to significant business disruption for enterprises relying on these communication systems, particularly in environments where continuous availability is critical. The attack vector is particularly dangerous because it requires no authentication, making it accessible to any remote attacker with network connectivity to the vulnerable devices. According to ATT&CK framework, this vulnerability maps to T1499.004 which covers Network Denial of Service attacks, and T1595.001 which addresses network infrastructure manipulation through protocol manipulation.
Mitigation strategies for CVE-2017-15342 should prioritize immediate firmware updates from Huawei to address the buffer calculation flaw. Organizations should implement network segmentation to limit exposure of these devices to untrusted networks and deploy intrusion detection systems to monitor for suspicious SSL traffic patterns. Additionally, network administrators should consider implementing rate limiting on SSL connections to prevent rapid buffer exhaustion attacks. The vulnerability demonstrates the importance of proper input validation and buffer management in cryptographic implementations, highlighting the need for comprehensive security testing of SSL/TLS processing components in network infrastructure devices. Regular security assessments and vulnerability scanning should be conducted to identify similar buffer management issues in other network equipment that may be susceptible to analogous exploitation techniques.