Vulnerability identifier: #VU59079

Vulnerability risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-20049

CWE-ID: CWE-204

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SMA 100
Hardware solutions / Security hardware applicances

Vendor: SonicWall

Description

The vulnerability allows a remote attacker to enumerate user logins.

The vulnerability exists in the SonicWall SMA100 password change API due to different responses sent for exiting and non-existing users. A remote attacker can enumerate usernames.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SMA 100: 10.2.1.2-24sv, 10.2.1.1-19sv, 10.2.0.8-37sv, 10.2.0.7-34sv, 10.2.1.0-17sv, 10.2.0.6-31sv, 10.2.0.5-d-29sv, 10.2.0.3-24sv, 10.2.0.2-20sv

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External links
http://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0030

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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.