CVE-2020-15678 is a high-severity vulnerability affecting various systems running Mozilla Firefox, Thunderbird, and Firefox ESR. The vulnerability occurs when an iterator becomes invalid while recursing through graphical layers during scrolling, potentially leading to a use-after-free situation. This issue is present in certain versions of Firefox, Thunderbird, and Firefox ESR, as well as Debian Linux and openSUSE Leap.

How do I know if I'm affected?

To determine if you're affected by the vulnerability, check if you're using any of the following software versions: Mozilla Firefox up to (excluding) 81.0, Mozilla Firefox ESR up to (excluding) 78.3, Mozilla Thunderbird up to (excluding) 78.3, openSUSE Leap 15.1 and 15.2, or Debian Linux 9.0 and 10.0. This vulnerability can cause issues when scrolling through graphical layers, potentially leading to a use-after-free situation and compromising your system's security. If you're using any of the mentioned software versions, it's crucial to update them to mitigate the risk.

What should I do if I'm affected?

If you're affected by the vulnerability, it's important to update your software to a secure version. For Mozilla Firefox, Thunderbird, and Firefox ESR, update to versions 81.0, 78.3, and 78.3, respectively. For openSUSE Leap and Debian Linux users, follow the security advisories and update your system accordingly. Always keep your software up-to-date to minimize security risks.

Is CVE-2020-15678 in CISA’s Known Exploited Vulnerabilities Catalog?

The CVE-2020-15678 vulnerability is not listed in CISA's Known Exploited Vulnerabilities Catalog. This vulnerability, known as Use After Free, was added to the National Vulnerability Database on October 1, 2020. While there is no specific due date or required action mentioned, it is implied that users should update their affected software to a version that fixes the vulnerability to ensure their systems remain secure.

Weakness enumeration

The weakness enumeration for this vulnerability is categorized as CWE-416. This issue could potentially lead to memory corruption, arbitrary code execution, or denial of service in affected software.

For more details

CVE-2020-15678 is a high-severity vulnerability affecting various systems and software. By addressing this issue, users can protect their systems from potential memory corruption, arbitrary code execution, or denial of service. For a comprehensive understanding of the vulnerability, including its description, severity, technical details, and affected software configurations, visit the NVD page or the links below.

• National Vulnerability Database (NVD) - CVE-2020-15678

• Bugzilla - Iterator invalidation potentially causing memory corruption

• [SECURITY] [DLA 2408-1] thunderbird security update