Is CVE-2021-20038 exploited in the wild?

Yes. CVE-2021-20038 is known to be exploited in the wild, first recorded on 28 January 2022. Treat it as urgent.

How severe is CVE-2021-20038?

Critical severity, with a CVSS score of 9.8, published 28 January 2022.

Which products and versions are affected?

SonicWall SMA 200 firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions; SonicWall SMA 210 firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions; SonicWall SMA 400 firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions; SonicWall SMA 410 firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions; and 1 more.

Is there a fix for CVE-2021-20038?

A patch was published on 2022-01-11: Rapid7 reported fixes for multiple vulnerabilities including CVE-2021-20038. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2021-20038 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2021-20038?

Check whether you run SonicWall SMA 100 Appliances. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2021-20038: SonicWall SMA 100 Appliances Stack-Based Buffer Overflow Vulnerability

CVE-2021-20038 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2022-01-28

A stack-based buffer overflow vulnerability exists in the SonicWall SMA 100 series Apache httpd server's mod_cgi module. Remote unauthenticated attackers can exploit this via environment variables to execute arbitrary code as the 'nobody' user.

Vendors: SonicWall.

Quick answers

Is CVE-2021-20038 exploited in the wild?: Yes. CVE-2021-20038 is known to be exploited in the wild, first recorded on 28 January 2022. Treat it as urgent.
How severe is CVE-2021-20038?: Critical severity, with a CVSS score of 9.8, published 28 January 2022.
Which products and versions are affected?: SonicWall SMA 200 firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions; SonicWall SMA 210 firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions; SonicWall SMA 400 firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions; SonicWall SMA 410 firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions; and 1 more.
Is there a fix for CVE-2021-20038?: A patch was published on 2022-01-11: Rapid7 reported fixes for multiple vulnerabilities including CVE-2021-20038. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2021-20038 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2021-20038?: Check whether you run SonicWall SMA 100 Appliances. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

SonicWall SMA 200 firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions
SonicWall SMA 210 firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions
SonicWall SMA 400 firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions
SonicWall SMA 410 firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions
SonicWall SMA 500v firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions

Timeline

2022-01-11: patched: Rapid7 reported fixes for multiple vulnerabilities including CVE-2021-20038.
2022-01-28: disclosed: NVD publication date.
2022-01-28: kev added: Added to CISA Known Exploited Vulnerabilities Catalog.
2022-01-28: exploited: Reported as exploited in the wild.

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