CVE-2017-15319 in RP200
Summary
by MITRE
RP200 V500R002C00, V600R006C00; TE30 V100R001C10, V500R002C00, V600R006C00; TE40 V500R002C00, V600R006C00; TE50 V500R002C00, V600R006C00; TE60 V100R001C10, V500R002C00, V600R006C00 have an out-of-bounds read vulnerabilities in some Huawei products. Due to insufficient input validation, a remote attacker could exploit these vulnerabilities by sending specially crafted SS7 related packets to the target devices. Successful exploit will cause out-of-bounds read and possibly crash the system.
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Analysis
by VulDB Data Team • 01/18/2023
The vulnerability identified as CVE-2017-15319 represents a critical out-of-bounds read flaw affecting multiple Huawei communication devices including RP200 and various TE series terminals. This vulnerability manifests in specific firmware versions across different product lines, creating widespread potential impact within enterprise communication infrastructures. The affected devices operate using SS7 signaling protocols which form the backbone of traditional telecommunications networks, making these systems particularly susceptible to exploitation due to their critical role in network operations.
The technical root cause of this vulnerability stems from inadequate input validation mechanisms within the SS7 packet processing components of these Huawei devices. When the system receives specially crafted SS7 packets, the insufficient validation allows malformed data to traverse the normal processing boundaries, resulting in memory access violations that manifest as out-of-bounds read operations. This type of vulnerability falls under the CWE-125 weakness category, specifically representing an out-of-bounds read condition where the application attempts to access memory locations beyond the allocated buffer boundaries. The flaw essentially allows an attacker to read memory contents that should remain protected, potentially exposing sensitive information or system state data.
The operational impact of this vulnerability extends beyond simple system instability, as successful exploitation can lead to complete system crashes and service disruption. In telecommunications environments where these devices operate as critical infrastructure components, such an exploit could result in significant network downtime and communication failures. The remote nature of the attack vector means that adversaries can target these systems from external networks without requiring physical access or local credentials, making the vulnerability particularly dangerous in enterprise environments where network security is paramount. The potential for information disclosure through memory read operations adds another layer of risk, as attackers might extract confidential data or system configurations from the vulnerable devices.
Mitigation strategies for this vulnerability should focus on immediate firmware updates from Huawei to address the input validation deficiencies. Network administrators must also implement robust monitoring solutions to detect anomalous SS7 traffic patterns that could indicate exploitation attempts. The ATT&CK framework categorizes this type of vulnerability under the T1059.007 technique for remote code execution through protocol manipulation, while the defensive measures align with T1562.001 for credential access prevention and T1046 for network service detection. Organizations should also consider implementing network segmentation to isolate these critical devices and deploy intrusion detection systems specifically configured to monitor SS7 protocol traffic for suspicious activity. Additionally, regular security assessments and vulnerability scanning should be conducted to identify any other potential weaknesses in the communication infrastructure that might be exploited alongside this vulnerability.