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CVE-2020-15658

6.5 · MEDIUM

The code for downloading files did not properly take care of special characters, which led to an attacker being able to cut off the file ending at an earlier position, leading to a different file t…

Published Aug 10, 2020CWE-754EPSS 1.39%

Overview

CVE-2020-15658 is a medium-severity vulnerability. It was published on August 10, 2020 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The code for downloading files did not properly take care of special characters, which led to an attacker being able to cut off the file ending at an earlier position, leading to a different file type being downloaded than shown in the dialog. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.

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

Reflists.opensuse.org/opensuse-security-announce/2020-08/msg00025.htmlRefbugzilla.mozilla.org/show_bug.cgi?id=1637745Refusn.ubuntu.com/4443-1/Refwww.mozilla.org/security/advisories/mfsa2020-30/Refwww.mozilla.org/security/advisories/mfsa2020-32/Refwww.mozilla.org/security/advisories/mfsa2020-33/Reflists.opensuse.org/opensuse-security-announce/2020-08/msg00025.htmlRefbugzilla.mozilla.org/show_bug.cgi?id=1637745Refusn.ubuntu.com/4443-1/Refwww.mozilla.org/security/advisories/mfsa2020-30/

How CyberStrike helps

Frequently asked questions

What is CVE-2020-15658?

CVE-2020-15658 is a medium-severity vulnerability. It was published on August 10, 2020 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2020-15658?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-15658?

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-2020-15658?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-15658 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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