Use-after-free in Huawei products - CVE-2021-22321

Vulnerability identifier: #VU50910

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-22321

CWE-ID: CWE-416

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 use-after-free error. A remote attacker can cause a denial of service condition on the target system.

Huawei S9700
Huawei S2700
Huawei S6700
Huawei S7700
Huawei S1700
USG9500
Huawei S12700
Huawei S5700
Huawei Secospace USG6500
Huawei Secospace USG6600
Huawei Secospace USG6300
Huawei NIP6300
Huawei NIP6600
Huawei NIP6800

Install updates from vendor's website.

Huawei S9700 - update to V200R013C00SPC500
Huawei S12700 - update to V200R013C00SPC500
Huawei S5700 - update to V200R013C00SPC500
Huawei S2700 - update to V200R013C00SPC500
Huawei S6700 - update to V200R013C00SPC500
Huawei S7700 - update to V200R013C00SPC500
Huawei S1700 - update to V200R013C00SPC500
Huawei Secospace USG6500 - update to V500R005C20SPC500
Huawei Secospace USG6600 - update to V500R005C20SPC500
USG9500 - update to V500R005C20SPC500
Huawei NIP6300 - update to V500R005C20SPC500
Huawei Secospace USG6300 - update to V500R005C20SPC500
Huawei NIP6600 - update to V500R005C20SPC500
Huawei NIP6800 - update to V500R005C20SPC500

• https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20210210-01-uaf-en

• Denial of service in Huawei Products