The remote Ubuntu 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6456-1 advisory.

    Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially     crafted website, an attacker could potentially exploit these to cause a denial of service, obtain     sensitive information across domains, or execute arbitrary code. (CVE-2023-5722, CVE-2023-5724,     CVE-2023-5728, CVE-2023-5729, CVE-2023-5730, CVE-2023-5731)

    Kelsey Gilbert discovered that Firefox did not properly manage certain browser prompts and dialogs due to     an insufficient activation-delay. An attacker could potentially exploit this issue to perform     clickjacking. (CVE-2023-5721)

    Daniel Veditz discovered that Firefox did not properly validate a cookie containing invalid characters. An     attacker could potentially exploit this issue to cause a denial of service. (CVE-2023-5723)

    Shaheen Fazim discovered that Firefox did not properly validate the URLs open by installed WebExtension.
    An attacker could potentially exploit this issue to obtain sensitive information. (CVE-2023-5725)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

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Ubuntu 20.04 LTS : Firefox vulnerabilities (USN-6456-1)

critical Nessus Plugin ID 184009

Version 1.0