Mozilla Firefox/Firefox ESR buffer overflow

Summaryinfo

A vulnerability was found in Mozilla Firefox and Firefox ESR. It has been rated as critical. This issue affects some unknown processing. Performing a manipulation results in buffer overflow. This vulnerability is cataloged as CVE-2019-17024. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in Mozilla Firefox and Firefox ESR (Web Browser) (version unknown). This affects an unknown function. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Mozilla developers reported memory safety bugs present in Firefox 71 and Firefox ESR 68.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.

The weakness was shared 01/08/2020 as MFSA 2020-01 as confirmed security advisory (Website). The advisory is shared at mozilla.org. This vulnerability is uniquely identified as CVE-2019-17024 since 09/30/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/20/2026).

The vulnerability scanner Nessus provides a plugin with the ID 291751 (MiracleLinux 7 : firefox-68.4.1-1.0.1.el7.AXS7 (AXSA:2020-4427:01)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (291751). The entries VDB-148440, VDB-148441, VDB-148442 and VDB-148443 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Web Browser

Vendor

• Mozilla

Name

• Firefox
• Firefox ESR

License

• open-source

Website

• Vendor: https://www.mozilla.org/
• Product: https://www.mozilla.org/en-US/firefox/

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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