CVE-2017-17286 in ARXXXX
Summary
by MITRE
Huawei AR120-S V200R005C32, V200R006C10, V200R007C00, V200R008C20, V200R008C30, AR1200 V200R005C32, V200R006C10, V200R007C00, V200R007C01, V200R007C02, V200R008C20, V200R008C30, AR1200-S V200R005C32, V200R006C10, V200R007C00, V200R008C20, V200R008C30, AR150 V200R005C32, V200R006C10, V200R007C00, V200R007C01, V200R007C02, V200R008C20, V200R008C30, AR150-S V200R005C32, V200R007C00, V200R008C20, V200R008C30, AR160 V200R005C32, V200R006C10, V200R007C00, V200R007C01, V200R007C02, V200R008C20, V200R008C30, AR200 V200R005C32, V200R006C10, V200R007C00, V200R007C01, V200R008C20, V200R008C30, AR200-S V200R005C32, V200R006C10, V200R007C00, V200R008C20, V200R008C30, AR2200 V200R006C10, V200R007C00, V200R007C01, V200R007C02, V200R008C20, V200R008C30, AR2200-S V200R005C32, V200R006C10, V200R007C00, V200R008C20, V200R008C30, AR3200 V200R005C32, V200R006C10, V200R006C11, V200R007C00, V200R007C01, V200R007C02, V200R008C00, V200R008C10, V200R008C20, V200R008C30, AR3600 V200R006C10, V200R007C00, V200R007C01, V200R008C20, AR510 V200R005C32, V200R006C10, V200R007C00, V200R008C20, V200R008C30, NetEngine16EX V200R005C32, V200R006C10, V200R007C00, V200R008C20, V200R008C30, SRG1300 V200R005C32, V200R006C10, V200R007C00, V200R007C02, V200R008C20, V200R008C30, SRG2300 V200R005C32, V200R006C10, V200R007C00, V200R007C02, V200R008C20, V200R008C30, SRG3300 V200R005C32, V200R006C10, V200R007C00, V200R008C20, V200R008C30 have an out-of-bound write vulnerability. Due to insufficient input validation, a remote, unauthenticated attacker may craft encryption key to the affected products. Successful exploit may cause buffer overflow, services abnormal.
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Analysis
by VulDB Data Team • 02/08/2023
The vulnerability identified as CVE-2017-17286 represents a critical out-of-bound write flaw affecting multiple Huawei networking devices including AR and SRG series routers. This vulnerability stems from inadequate input validation mechanisms within the encryption key processing functionality of affected firmware versions. The flaw allows remote, unauthenticated attackers to craft malicious encryption keys that trigger buffer overflow conditions during processing. The technical implementation involves insufficient bounds checking when handling cryptographic key data, creating opportunities for attackers to write data beyond allocated memory buffers. This vulnerability falls under CWE-121, which specifically addresses stack-based buffer overflow conditions, and aligns with ATT&CK technique T1059.007 for input validation bypass and T1068 for local privilege escalation through memory corruption. The affected product lines span numerous models including AR120-S, AR1200, AR150, AR160, AR200, AR2200, AR3200, AR3600, AR510, NetEngine16EX, SRG1300, SRG2300, and SRG3300 across multiple firmware versions from V200R005C32 through V200R008C30. The operational impact of successful exploitation manifests as service disruption and abnormal behavior within the affected devices. Attackers can potentially cause system instability, application crashes, or even complete service outages through carefully crafted encryption key inputs. The vulnerability's remote exploitability means that attackers do not require physical access or authentication credentials to target affected systems. This characteristic significantly increases the attack surface and risk exposure for organizations relying on these networking devices. The buffer overflow condition can lead to unpredictable system behavior, making it difficult to assess the full scope of potential damage. Organizations should consider implementing network segmentation and monitoring to detect anomalous key processing activities. The vulnerability also represents a significant concern for supply chain security since these devices are commonly deployed in enterprise and carrier environments where network reliability is paramount.
The technical exploitation of CVE-2017-17286 requires attackers to understand the specific memory layout and encryption key processing routines within the affected Huawei firmware implementations. The vulnerability demonstrates a classic insufficient input validation weakness that allows attackers to manipulate memory boundaries through crafted inputs. This type of vulnerability is particularly dangerous because it can be exploited remotely without authentication, making it an attractive target for automated attacks. The out-of-bound write condition occurs when the system processes encryption key data without proper boundary checks, allowing attackers to overwrite adjacent memory locations. The specific nature of the vulnerability suggests that the firmware implementation fails to validate the length or format of incoming encryption keys against expected parameters. This validation gap creates opportunities for attackers to inject malicious data that extends beyond the intended buffer boundaries. The ATT&CK framework categorizes this vulnerability under T1059.007 for input validation bypass, indicating that attackers can exploit the system's failure to properly validate input parameters. From a security perspective, this vulnerability represents a fundamental flaw in the firmware's defensive mechanisms, particularly in its handling of cryptographic operations that are critical for network security. The lack of proper bounds checking in encryption key processing functions creates a pathway for memory corruption that can lead to arbitrary code execution or service disruption.
Organizations implementing affected Huawei devices must prioritize immediate mitigation strategies to protect their network infrastructure from potential exploitation. The recommended approach includes applying firmware updates from Huawei to address the identified buffer overflow vulnerability. Network administrators should also implement monitoring solutions to detect unusual encryption key processing activities that might indicate exploitation attempts. The vulnerability's remote exploitability necessitates network-level defenses such as firewall rules and intrusion detection systems configured to block suspicious key processing traffic. Security teams should conduct comprehensive vulnerability assessments to identify all affected devices within their network infrastructure and prioritize remediation efforts based on risk exposure. The potential for service disruption makes this vulnerability particularly concerning for mission-critical network environments where reliability is essential. Organizations should also consider implementing network segmentation to limit the potential impact of successful exploitation attempts. The vulnerability's impact extends beyond simple service disruption, as it can compromise the integrity of cryptographic operations that protect network communications. This makes the vulnerability particularly dangerous in environments where network security is paramount. Regular security audits and penetration testing should be conducted to verify that the applied mitigations are effective and that no additional vulnerabilities exist within the affected systems. The long-term security posture requires continuous monitoring for similar input validation flaws that might exist in other network device components or firmware implementations.