Vulnerability identifier: #VU50910

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-22321

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Huawei NIP6300
Server applications / IDS/IPS systems, Firewalls and proxy servers
Huawei NIP6600
Server applications / IDS/IPS systems, Firewalls and proxy servers
Huawei NIP6800
Server applications / IDS/IPS systems, Firewalls and proxy servers
Huawei S12700
Hardware solutions / Routers for home users
Huawei S5700
Hardware solutions / Routers for home users
Huawei S1700
Hardware solutions / Routers & switches, VoIP, GSM, etc
Huawei S2700
Hardware solutions / Routers & switches, VoIP, GSM, etc
Huawei S6700
Hardware solutions / Routers & switches, VoIP, GSM, etc
Huawei S7700
Hardware solutions / Routers & switches, VoIP, GSM, etc
Huawei S9700
Hardware solutions / Routers & switches, VoIP, GSM, etc
USG9500
Hardware solutions / Routers & switches, VoIP, GSM, etc
Huawei Secospace USG6300
Server applications / Server solutions for antivurus protection
Huawei Secospace USG6500
Server applications / Server solutions for antivurus protection
Huawei Secospace USG6600
Server applications / Server solutions for antivurus protection

Vendor: Huawei

Description

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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Huawei NIP6300: V500R001C30 - V500R001C60

Huawei NIP6600: V500R001C30

Huawei NIP6800: V500R001C60

Huawei S12700: V200R007C01 - V200R011C10

Huawei S1700: V200R009C00SPC200 - V200R011C10

Huawei S2700: V200R008C00 - V200R011C10

Huawei S5700: V200R008C00 - V200R011C10SPC100

Huawei S6700: V200R008C00 - V200R011C10SPC100

Huawei S7700: V200R008C00 - V200R011C10

Huawei S9700: V200R007C01 - V200R011C10

Huawei Secospace USG6300: V500R001C30 - V500R001C60

Huawei Secospace USG6500: V500R001C30 - V500R001C60

Huawei Secospace USG6600: V500R001C30 - V500R001C60

USG9500: V500R001C30 - V500R001C60

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External links
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20210210-01-uaf-en

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.