CVE-2019-5274 : Exploit Details and Defense Strategies

The USG9500 with versions V500R001C30 and V500R001C60 is exposed to a security issue that can lead to denial of service due to a flaw in the X.509 implementation.

Understanding CVE-2019-5274

This CVE involves a denial of service vulnerability in Huawei's USG9500 series.

What is CVE-2019-5274?

The vulnerability in USG9500 versions V500R001C30 and V500R001C60 allows attackers to exploit a flaw in the X.509 implementation, potentially causing a denial of service by using a malicious certificate.

The Impact of CVE-2019-5274

Exploitation of this vulnerability can lead to a denial of service attack on the affected products, disrupting their normal operation.

Technical Details of CVE-2019-5274

This section provides more technical insights into the vulnerability.

Vulnerability Description

The flaw in the X.509 implementation in USG9500 versions V500R001C30 and V500R001C60 can result in an infinite loop, enabling attackers to trigger a denial of service attack using a malicious certificate.

Affected Systems and Versions

Product: USG9500
Vendor: Huawei
Affected Versions: V500R001C30, V500R001C60

Exploitation Mechanism

Attackers can exploit this vulnerability by utilizing a malicious certificate to trigger a denial of service attack on the affected USG9500 products.

Mitigation and Prevention

To address CVE-2019-5274, follow these mitigation strategies:

Immediate Steps to Take

Apply vendor-supplied patches promptly.
Monitor network traffic for any signs of exploitation.
Implement strong certificate validation mechanisms.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Conduct security assessments and penetration testing regularly.

Patching and Updates

Ensure timely installation of security patches provided by Huawei to mitigate the vulnerability effectively.