When multiple WASM threads had a reference to a module, and were looking up exported functions, one WASM thread could have overwritten another's entry in a shared stub table, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 82.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - When multiple WASM threads had a reference to a module, and were looking up exported functions, one WASM     thread could have overwritten another's entry in a shared stub table, resulting in a potentially     exploitable crash. This vulnerability affects Firefox < 82. (CVE-2020-15681)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Ubuntu 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4599-2 advisory.

    USN-4599-1 fixed vulnerabilities in Firefox. This update provides the corresponding updates for Ubuntu     16.04 LTS.



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.

The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4599-1 advisory.

    Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially     crafted website, an attacker could potentially exploit these to cause a denial of service, spoof the     prompt for opening an external application, obtain sensitive information, or execute arbitrary code.

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.

The version of Firefox installed on the remote macOS or Mac OS X host is prior to 82.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-45 advisory.

  - Crossbeam is a set of tools for concurrent programming. In crossbeam-channel before version 0.4.4, the     bounded channel incorrectly assumes that `Vec::from_iter` has allocated capacity that same as the number     of iterator elements. `Vec::from_iter` does not actually guarantee that and may allocate extra memory. The     destructor of the `bounded` channel reconstructs `Vec` from the raw pointer based on the incorrect assumes     described above. This is unsound and causing deallocation with the incorrect capacity when     `Vec::from_iter` has allocated different sizes with the number of iterator elements. This has been fixed     in crossbeam-channel 0.4.4. (CVE-2020-15254)

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

The version of Firefox installed on the remote Windows host is prior to 82.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-45 advisory.

  - Crossbeam is a set of tools for concurrent programming. In crossbeam-channel before version 0.4.4, the     bounded channel incorrectly assumes that `Vec::from_iter` has allocated capacity that same as the number     of iterator elements. `Vec::from_iter` does not actually guarantee that and may allocate extra memory. The     destructor of the `bounded` channel reconstructs `Vec` from the raw pointer based on the incorrect assumes     described above. This is unsound and causing deallocation with the incorrect capacity when     `Vec::from_iter` has allocated different sizes with the number of iterator elements. This has been fixed     in crossbeam-channel 0.4.4. (CVE-2020-15254)

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

ID	Name	Product	Family	Severity
247484	Linux Distros Unpatched Vulnerability : CVE-2020-15681	Nessus	Misc.	high
141923	Ubuntu 16.04 LTS : Firefox vulnerabilities (USN-4599-2)	Nessus	Ubuntu Local Security Checks	critical
141863	Ubuntu 18.04 LTS / 20.04 LTS : Firefox vulnerabilities (USN-4599-1)	Nessus	Ubuntu Local Security Checks	critical
141572	Mozilla Firefox < 82.0	Nessus	MacOS X Local Security Checks	critical
141571	Mozilla Firefox < 82.0	Nessus	Windows	critical

Detections

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CVE-2020-15681

high

Tenable Plugins

high

critical

critical

critical

critical