CVE-2019-19411 Scanner

Huawei USG9500 series firewalls are widely utilized in enterprises and organizations for network security solutions. They are employed to protect sensitive data, prevent unauthorized access, and ensure network availability. The firewalls offer advanced features such as intrusion prevention, antivirus, and VPN functionalities. Users rely on these devices to secure their networks against external and internal threats. Network administrators use these products to control traffic, detect intrusions, and manage security policies. The firewalls are an essential component in securing small to large-scale network infrastructures.

The vulnerability in the Huawei USG9500 series pertains to Local File Inclusion, which occurs due to improper input handling. This kind of vulnerability can enable attackers to access restricted files on the server. Specifically, it allows malicious actors to include files on a server through the web browser. This can lead to unauthorized access to sensitive data or system configurations. Exploiting this vulnerability requires gaining access to certain cryptographic primitives. Attackers could leverage this to diminish the confidentiality of the encrypted data used by the system.

Technical details reveal that the vulnerability in Huawei USG9500 is linked to the improper processing of the initialization vector in an encryption algorithm. The vulnerable endpoint typically includes a file retrieval mechanism that does not properly validate paths. Attackers can exploit this by constructing malformed requests, incorporating traversal sequences that permit access outside designated directories. Successful exploitation demands a specific sequence of inputs and methods to bypass the existing protections and access restricted files like '/etc/passwd'. The vulnerability is noted to affect several specific firmware versions of the firewall.

Exploiting this vulnerability could allow attackers to read sensitive files and data, particularly those containing username and password hashes. It could lead to the exposure of critical system information, potentially aiding further attacks such as privilege escalation or deeper network intrusions. Organizations might experience unauthorized access to sensitive data, leading to data breaches. Additionally, the compromised systems may serve as entry points for more severe security incidents. Therefore, effective mitigation strategies are necessary to prevent exploitation.

REFERENCES

• https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20200115-01-firewall-en