CVE-2017-17174 in RSE6500
Summary
by MITRE
Some Huawei products RSE6500 V500R002C00; SoftCo V200R003C20SPCb00; VP9660 V600R006C10; eSpace U1981 V100R001C20; V200R003C20; V200R003C30; V200R003C50 have a weak algorithm vulnerability. To exploit the vulnerability, a remote, unauthenticated attacker has to capture TLS traffic between clients and the affected products. The attacker may launch the Bleichenbacher attack on RSA key exchange to decrypt the session key and the previously captured sessions by some cryptanalytic operations. Successful exploit may cause information leak.
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Analysis
by VulDB Data Team • 04/27/2023
The vulnerability identified as CVE-2017-17174 affects several Huawei communication and networking products including RSE6500 V500R002C00, SoftCo V200R003C20SPCb00, VP9660 V600R006C10, and various eSpace U1981 models. This weakness stems from the implementation of cryptographic algorithms that do not meet modern security standards, specifically impacting the RSA key exchange mechanism used in TLS communications. The vulnerability represents a significant concern for organizations relying on these devices for secure communications, as it exposes sensitive data to potential interception and decryption attacks.
The technical flaw manifests through the use of weak cryptographic primitives that allow attackers to perform the Bleichenbacher attack, a well-documented cryptographic attack against RSA implementations that utilize PKCS#1 v1.5 padding. This attack exploits the way certain RSA implementations handle padding validation errors, enabling an attacker to gradually recover the plaintext of encrypted messages through a series of carefully crafted queries. The vulnerability is particularly dangerous because it requires only network traffic capture and does not necessitate authentication, making it accessible to remote attackers who can exploit the weakness without prior access to the systems.
The operational impact of this vulnerability extends beyond simple information disclosure, as successful exploitation could lead to complete session hijacking and unauthorized access to sensitive communications. Organizations using affected Huawei products face potential exposure of confidential business data, user credentials, and proprietary information transmitted through these devices. The attack vector is particularly concerning because it can be executed against previously captured sessions, meaning that even encrypted communications that were thought to be secure may be vulnerable to decryption after the initial attack window. This capability significantly amplifies the potential damage and makes the vulnerability particularly attractive to sophisticated threat actors.
Mitigation strategies should focus on immediate implementation of cryptographic protocol updates and the deployment of stronger encryption algorithms. Organizations must ensure that affected devices are updated with the latest firmware patches provided by Huawei, which typically address the weak algorithm implementations through proper padding schemes and stronger key exchange mechanisms. Network segmentation and monitoring should be enhanced to detect unusual traffic patterns that might indicate exploitation attempts. The vulnerability aligns with CWE-327, which addresses the use of weak cryptographic algorithms, and maps to ATT&CK technique T1566 related to credential access through network attacks. Additionally, organizations should consider implementing certificate pinning and other advanced security measures to prevent exploitation of similar vulnerabilities in the future.