Critical Vulnerability 'SMBleed' Impacts Windows SMB Protocol



    Security researchers from ZecOps have discovered a new critical vulnerability ‘SMBleed’ affecting the Server Message Block (SMB) protocol that could allow attackers to leak kernel memory remotely, and when combined with a previously disclosed “wormable” RCE vulnerability (SMBGhost), allows attackers to gain RCE control over the SMB server or client.

    CVEs assigned:


    Affected Softwares:

    Windows 10 Version 1903 32/64-bit Systems, ARM64-based Systems, Server Core installation
    Windows 10 Version 1909 32/64-bit Systems, ARM64-based Systems, Server Core installation
    Windows 10 Version 2004 32/64-bit Systems, ARM64-based Systems, Server Core installation


    To address this vulnerability, Microsoft 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.


    Vulnerability detection and patching of SMBv3:

    Login to SanerNow platform
    Switch to the account/site specific view and Go to 'VM tool'
    If your Application (Firefox or Firefox ESR) is vulnerable, Saner lists the above CVEs in 'Top Vulnerabilities or 'Recently Discovered Vulnerabilities' as shown in the below diagram:


    Search for this vulnerability in VM tool. If you are affected, apply the patch through PM -> Missing Patches.
    Select 'Groups/Devices' in the 'Asset Source' section and click 'Apply'.
    Select the product 'Mozilla Firefox' or 'Mozilla Firefox ESR' from the 'Asset' section as shown in the below image:


    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:


    Remediation job will be created, which will fix the vulnerability by upgrading Mozilla Firefox or Firefox ESR to the latest patch version.
    Once remediation is done, the Saner agent automatically scans again and uploads the result to SanerNow as shown below:


    Was this article helpful?
    0 out of 0 found this helpful