QID 375971

Date Published: 2021-10-29

QID 375971: Nmap Buffer Overrun Vulnerability

Nmap ("Network Mapper") is a free and open source (license) utility for network discovery and security auditing.

The QID checks for vulnerability that exists in the OpenSSL library used by Nmap.
It affects latest version of Nmap as it uses OpenSSL 1.1.1k. The Vulnerability has been fixed in OpenSSL 1.1.1l and may be fixed in the future Nmap release.

Affected Software:
Nmap upto version 7.92.

QID Detection Logic (Authenticated Unix):
This QID checks for vulnerable versions of nmap by executing "nmap --version" command.

QID Detection Logic (Authenticated Windows) :
This QID checks for vulnerable versions of nmap using file "nmap.exe" version.

NOTE: The Windows check will only work for nmap when downloaded nmap using self-installer.

Successful exploitation could allow attacker to read buffer overruns processing ASN.1 strings.

  • CVSS V3 rated as High - 7.4 severity.
  • CVSS V2 rated as Medium - 5.8 severity.
    • Solution
    Currently no patch is available to fix this vulnerability but users are advised to install latest version of nmap from nmap download page.
    Vendor References

    CVEs related to QID 375971

    CVE-2021-3712 |
    Software Advisories
    Advisory ID Software Component Link
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