SB2021122102 - Multiple vulnerabilities in SonicWall SMA 100

Description

This security bulletin contains information about 2 vulnerabilities.

1) Observable Response Discrepancy (CVE-ID: CVE-2021-20049)

CWE-ID: CWE-204 - Observable Response Discrepancy

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

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.

2) Improper access control (CVE-ID: CVE-2021-20050)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions to multiple management APIs. A remote non-authenticated attacker can obtain configuration meta-data.

Remediation

Install update from vendor's website.

References

• https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0030
• https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0031