Vulnerability Details : CVE-2021-20022
Used for ransomware!
SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to upload an arbitrary file to the remote host.
Products affected by CVE-2021-20022
- cpe:2.3:a:sonicwall:email_security:*:*:*:*:*:*:*:*
- cpe:2.3:a:sonicwall:hosted_email_security:*:*:*:*:*:*:*:*
CVE-2021-20022 is in the CISA Known Exploited Vulnerabilities Catalog
This issue is known to have been leveraged as part of a ransomware campaign.
CISA vulnerability name:
SonicWall Email Security Unrestricted Upload of File Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
SonicWall Email Security contains an unrestricted upload of file with dangerous type vulnerability that allows a post-authenticated attacker to upload a file to the remote host. This vulnerability has known usage in a SonicWall Email Security exploit chain along with CVE-2021-20021 and CVE-2021-2002
Notes:
https://nvd.nist.gov/vuln/detail/CVE-2021-20022
Added on
2021-11-03
Action due date
2021-11-17
Exploit prediction scoring system (EPSS) score for CVE-2021-20022
0.33%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 71 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20022
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
6.5
|
MEDIUM | AV:N/AC:L/Au:S/C:P/I:P/A:P |
8.0
|
6.4
|
NIST | |
7.2
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
1.2
|
5.9
|
134c704f-9b21-4f2e-91b3-4a467353bcc0 | 2025-02-06 |
7.2
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
1.2
|
5.9
|
NIST |
CWE ids for CVE-2021-20022
-
The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.Assigned by:
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Primary)
- nvd@nist.gov (Secondary)
- PSIRT@sonicwall.com (Primary)
References for CVE-2021-20022
-
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0008
Security AdvisoryVendor Advisory
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