CVE-2019-5257

Vulnerability

A resource management vulnerability exists in certain Huawei products, including AP2000, IPS Module, NGFW Module, NIP6300, NIP6600, NIP6800, S5700, SVN5600, SVN5800, SVN5800-C, SeMG9811, and Secospace. The bug resides in the inter-process communication handling, where an attacker who can log in to the affected board may send crafted messages from the internal network port or tamper with inter-process message packets. Due to insufficient validation of these messages, the system improperly manages resources, potentially leading to resource exhaustion or a system anomaly. Affected versions are those prior to the fix release detailed in the Huawei security advisory [1].

Exploitation

To exploit this vulnerability, an attacker must first have the ability to log in to the affected board and be positioned on the internal network. The attacker sends crafted messages or manipulates inter-process message packets from the internal network port. The attack does not require high privileges beyond local board access. No user interaction is needed from other users; the attacker directly sends the malicious messages to trigger the resource management flaw [1].

Impact

Successful exploitation can cause the affected board to become abnormal, leading to a denial of service (DoS) condition. The vulnerability primarily impacts availability, as the system may crash, stop responding, or experience resource exhaustion. No code execution or privilege escalation is mentioned in the available references [1].

Mitigation

Huawei has released security updates to address this vulnerability. The fix is included in the patch referenced in the security advisory [1]. Users should upgrade their affected products to the fixed versions as specified in the advisory. No workarounds are mentioned in the source. The CVE is not listed on the CISA Known Exploited Vulnerabilities (KEV) catalog as of the publication date.