Release of invalid pointer or reference in Huawei products - CVE-2021-40042

Vulnerability identifier: #VU59870

CSH Severity: Medium

CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-40042

CWE-ID: CWE-763

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a release of invalid pointer in Huawei OptiX OSN 9800 U32 product. A remote authenticated attacker can send specially crafted messages and cause a denial of service condition in th target system.

Huawei CloudEngine 12800
Huawei CloudEngine 5800
Huawei CloudEngine 6800
Huawei CloudEngine 7800

Install updates from vendor's website.

Huawei CloudEngine 12800 - update to V200R019SPH007
Huawei CloudEngine 5800 - addressed in versions V200R019SPH007, V200R020SPH003
Huawei CloudEngine 6800 - addressed in versions V200R020SPH003, V200R020C00SPC600, V300R020SPH003
Huawei CloudEngine 7800 - update to V200R019SPH007

• https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20220112-01-invalid-en

• Denial of service in Huawei CloudEngine products