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CVE-2020-6799

8.8 · HIGH

Command line arguments could have been injected during Firefox invocation as a shell handler for certain unsupported file types.

Published Mar 2, 2020CWE-88EPSS 1.53%

Overview

CVE-2020-6799 is a high-severity vulnerability. It was published on March 2, 2020 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Command line arguments could have been injected during Firefox invocation as a shell handler for certain unsupported file types. This required Firefox to be configured as the default handler for a given file type and for a file downloaded to be opened in a third party application that insufficiently sanitized URL data. In that situation, clicking a link in the third party application could have been used to retrieve and execute files whose location was supplied through command line arguments. Note: This issue only affects Windows operating systems and when Firefox is configured as the default handler for non-default filetypes. Other operating systems are unaffected. This vulnerability affects Firefox < 73 and Firefox < ESR68.5.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refbugzilla.mozilla.org/show_bug.cgi?id=1606596Refsecurity.gentoo.org/glsa/202003-02Refwww.mozilla.org/security/advisories/mfsa2020-05/Refwww.mozilla.org/security/advisories/mfsa2020-06/Refbugzilla.mozilla.org/show_bug.cgi?id=1606596Refsecurity.gentoo.org/glsa/202003-02Refwww.mozilla.org/security/advisories/mfsa2020-05/Refwww.mozilla.org/security/advisories/mfsa2020-06/

How CyberStrike helps

Frequently asked questions

What is CVE-2020-6799?

CVE-2020-6799 is a high-severity vulnerability. It was published on March 2, 2020 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2020-6799?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-6799?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-6799?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-6799 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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