CVE-2020-1866 Explained : Impact and Mitigation

A vulnerability in several Huawei products could allow attackers to cause service abnormalities.

Understanding CVE-2020-1866

What is CVE-2020-1866?

There is an out-of-bounds read vulnerability in multiple Huawei products. Attackers can trigger this issue by sending crafted DHCP messages, leading to abnormal service behavior.

The Impact of CVE-2020-1866

The successful exploitation of this vulnerability could result in certain services becoming abnormal, affecting the overall system functionality.

Technical Details of CVE-2020-1866

Vulnerability Description

The software in the affected products reads data beyond the intended buffer, resulting in an out-of-bounds read vulnerability.

Affected Systems and Versions

NIP6800: V500R001C30, V500R001C60SPC500, V500R005C00
S12700: V200R008C00
S2700: V200R008C00
S5700: V200R008C00
S6700: V200R008C00
S7700: V200R008C00
S9700: V200R008C00
Secospace USG6600: V500R001C30SPC200, V500R001C30SPC600, V500R001C60SPC500, V500R005C00
USG9500: V500R001C30SPC300, V500R001C30SPC600, V500R001C60SPC500, V500R005C00

Exploitation Mechanism

Attackers take advantage of crafted DHCP messages to read past the intended buffer, triggering service abnormalities.

Mitigation and Prevention

Immediate Steps to Take

Apply patches provided by Huawei to address the vulnerability.
Monitor network traffic for any suspicious activities that could indicate exploitation attempts.
Restrict access to vulnerable systems to authorized personnel only.

Long-Term Security Practices

Regularly update and apply security patches to all systems and software.
Conduct security training for IT personnel to increase awareness of potential threats and vulnerabilities.

Patching and Updates

Huawei has released patches to address the out-of-bounds read vulnerability in the affected products.