An unauthenticated remote attacker can use SMA 100 as an unintended proxy or intermediary undetectable proxy to bypass firewall rules. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.
Published 2021-12-08 10:15:08
Updated 2023-06-26 19:15:04
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-20042

0.42%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 73 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-20042

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.5
HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
NIST
9.8
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
NIST

CWE ids for CVE-2021-20042

  • The product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product's control sphere. This causes the product to appear to be the source of the request, leading it to act as a proxy or other intermediary between the upstream component and the external actor.
    Assigned by: PSIRT@sonicwall.com (Secondary)
  • The product uses an externally controlled name or reference that resolves to a resource that is outside of the intended control sphere.
    Assigned by: nvd@nist.gov (Primary)

Products affected by CVE-2021-20042

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