Patching Zero-Day Heap Buffer Overflow Vulnerability (CVE-2020-15999) using SanerNow



    Google team has patched a critical Zero-Day Heap Buffer Overflow Vulnerability in the Google Chrome browser. CVE identifier CVE-2020-15999 has been assigned to this vulnerability. Successful exploitation of this vulnerability allows attackers to gain arbitrary code execution by using specially crafted fonts with embedded PNG images. 

    CVSS v3.0 Severity and Metrics:

    Base Score: 10.0 CRITICAL

    CVSS v2.0 Severity and Metrics:

    Base Score: 9.3 CRITICAL

    Affected software:

    • Google chrome versions before 86.0.4240.111


    To address this vulnerability, the vendor has released security patches. For more information, please refer to our blog

    Use SanerNow platform to apply this critical patch quickly across the organization as shown below.

    SanerNow: Vulnerability detection and patching of Zero-Day Heap Buffer Overflow Vulnerability:

    1. Login to SanerNow platform
    2. Switch to the account/site specific view and Go to 'VM tool'
    3. If your Windows Operating System is vulnerable, Saner lists the CVE’s CVE-2020-15999 in 'Top Vulnerabilities' or 'Recently Discovered Vulnerabilities' as shown in the below diagram


    1. Search for this vulnerability in the VM tool. If you are affected, apply the patch through PM -> Missing Patches
    2. Select 'Groups/Devices' in the 'Asset Source' section and click 'Apply'.
    3. Select the 'Windows OS' product from the 'Asset'section as shown in the below diagram.


    1. Select 'Apply Selected Patches' at the rightmost corner. This will prompt for 'Creating Patching Task'. Fill in 'Task Name' and 'Remediation Schedule' as per your preference and click on 'Apply Selected Patches' as shown below,


    1. Remediation job will be created, which will fix the vulnerability by upgrading the software and making the system immune to Google Chrome Zero-Day Heap Buffer Overflow vulnerability.
    2. Once remediation is done, the Saner agent automatically scans again and upload the result to SanerNow as shown below,


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