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Adobe security alert.

February 9, 2021

Advisory overview

Qualys Vulnerability R&D Lab has released new vulnerability checks in the Qualys Cloud Platform to protect organizations against 23 vulnerabilities that were fixed in 1 bulletins announced today by Adobe. Customers can immediately audit their networks for these and other new vulnerabilities by accessing their Qualys subscription. Visit Qualys Security Blog to prioritize remediation.

Non-Qualys customers can audit their network for these and other vulnerabilities by signing up for a Qualys Free Trial, or by trying Qualys Community Edition.

Vulnerability details

Adobe has released 1 security bulletins to fix newly discovered flaws in their software. Qualys has released the following checks for these new vulnerabilities:

  • Adobe Security Update for Adobe Acrobat and Reader(APSB21-09)

    Critical 4
    Qualys ID
    Vendor Reference
    CVE Reference
    CVE-2021-21017, CVE-2021-21021, CVE-2021-21028, CVE-2021-21033, CVE-2021-21034, CVE-2021-21035, CVE-2021-21036, CVE-2021-21037, CVE-2021-21038, CVE-2021-21039, CVE-2021-21040, CVE-2021-21041, CVE-2021-21042, CVE-2021-21044, CVE-2021-21045, CVE-2021-21046, CVE-2021-21057, CVE-2021-21058, CVE-2021-21059, CVE-2021-21060, CVE-2021-21061, CVE-2021-21062, CVE-2021-21063
    CVSS Scores
    Base 9.3 / Temporal 7.7
    Adobe Reader and Acrobat are applications for handling PDF files.

    Multiple Vulnerabilities are detected in them ranging from DOS, privilege escalation and arbitrary code execution with below CVEs: CVE-2021-21046,CVE-2021-21017,CVE-2021-21037,CVE-2021-21036,CVE-2021-21045,CVE-2021-21042,CVE-2021-21034,CVE-2021-21061,CVE-2021-21044,CVE-2021-21038,CVE-2021-21058,CVE-2021-21059,CVE-2021-21062,CVE-2021-21063,CVE-2021-21057,CVE-2021-21060,CVE-2021-21041,CVE-2021-21040,CVE-2021-21039,CVE-2021-21035,CVE-2021-21033,CVE-2021-21028,CVE-2021-21021 Affected Versions:
    Acrobat DC Continuous 2020.013.20074 and earlier version for Windows and Macintosh
    Acrobat Reader DC Continuous 2020.013.20074 and earlier version for Windows and Macintosh
    Acrobat Classic 2020 2020.001.30018 and earlier versions for Windows and Macintosh
    Acrobat Reader 2020 Classic 2020.001.30018 and earlier versions for Windows and Macintosh
    Acrobat 2017 Classic 2017.011.30188 and earlier versions for Windows and Macintosh
    Acrobat Reader 2017 versions prior to 2017.011.30188 for Windows and Macintosh

    QID Detection Logic (Authenticated):
    This QID looks for the vulnerable version of Acrobat.dll, AcroRd32.dll and nppdf32.dll files.

    An attacker could exploit this vulnerability to compromise Confidentiality, Integrity and or Availability.

    Adobe has released fix to address this issue. Customers are advised to refer to APSB21-09 for updates pertaining to this vulnerability.

    The following are links for downloading patches to fix these vulnerabilities:

These new vulnerability checks are included in Qualys vulnerability signature 2.5.103-4. Each Qualys account is automatically updated with the latest vulnerability signatures as they become available. To view the vulnerability signature version in your account, from the Qualys Help menu, select the About tab.

Selective Scan Instructions Using Qualys

To perform a selective vulnerability scan, configure a scan profile to use the following options:

  1. Ensure access to TCP ports 135 and 139 are available.
  2. Enable Windows Authentication (specify Authentication Records).
  3. Enable the following Qualys IDs:
    • 375099
  4. If you would like the scan to return the Windows Hostname, also include QID 82044 and ensure access to UDP port 137 is available.
  5. If you would like to be notified if Qualys is unable to log on to a host (if Authentication fails), also include QID 105015.

In addition, prior to running a scan for these new vulnerabilities, you can estimate your exposure to these new threats by running the Risk Analysis Report, available from the Qualys Vulnerability Management Reports tab.

Access for Qualys Customers

Platforms and Platform Identification

Technical Support

For more information, customers may contact Qualys Technical Support.

About Qualys

The Qualys Cloud Platform and its integrated suite of security and compliance applications provides organizations of all sizes with a global view of their security and compliance solutions, while drastically reducing their total cost of ownership. Qualys solutions include: continuous monitoring, vulnerability management, policy compliance, PCI compliance, security assessment questionnaire, web application scanning, web application firewall, malware detection and SECURE Seal for security testing of web sites.