Patching the Heap-based Buffer Overflow (CVE-2019-14378) vulnerability in the open-source emulator QEMU




    QEMU (Quick Emulator) is a free and open source emulator which is used to perform hardware virtualization. A heap buffer overflow vulnerability was recently discovered in QEMU application. This vulnerability could be used to crash the QEMU process on the host which results in a DOS (Denial of service) condition or execute arbitrary code with the privileges of QEMU process.

     CVE assigned:


    CVSS v3.0 Severity and Metrics:
    Base Score: 8.8 HIGH

    CVSS v2.0 Severity and Metrics:
    Base Score: 6.5 MEDIUM 

    Affected Software's:
    QEMU versions with libslirp library 4.0.0 on all platforms.


    To address this vulnerability, the vendor has released patches for QEMU package in all the platforms affected. For more information, please refer to our blog:

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


    Vulnerability detection and patching of QEMU:

    1. Login to SanerNow platform
    2. Switch to the account/site specific view and Go to 'VM tool'
    3. If your Application (QEMU) is vulnerable, Saner lists CVE-2019-14378 in 'Top Vulnerabilities or 'Recently Discovered Vulnerabilities as shown in the below diagram: 



    1. Search for this vulnerability in 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 product 'QEMU' from the 'Asset' section as shown in the below diagram:


    1. Select ‘Apply Selected Patches’ at the rightmost corner. This will prompt for ‘Creating Patch 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 vulnerabilities by upgrading QEMU to the latest version.
    2. Once remediation is done, the Saner agent automatically scans again and uploads the result to SanerNow as shown below:


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