Multiple vulnerabilities in SonicWall SMA 100

Published: 2021-12-21

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-20049 CVE-2021-20050
CWE-ID	CWE-204 CWE-284
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	SMA 100 Hardware solutions / Security hardware applicances
Vendor	SonicWall

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Observable Response Discrepancy

EUVDB-ID: #VU59079

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 - Observable Response Discrepancy

Exploit availability: No

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: 10.2.0.2-20sv - 10.2.1.2-24sv

CPE2.3

cpe:2.3:h:sonicwall:sma_100:10.2.1.2-24sv:*:*:*:*:*:*:*
Full software list in CPE2.3 format available after registration.

External links

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

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.

2) Improper access control

EUVDB-ID: #VU59078

Risk: Medium

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

CVE-ID: CVE-2021-20050

CWE-ID: CWE-284 - Improper Access Control