QID 356497

QID 356497: Amazon Linux Security Advisory for ruby : ALAS2RUBY3.0-2023-005

An issue was discovered in ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1.
A malicious ftp server can use the pasv response to trick net::ftp into connecting back to a given ip address and port.
This potentially makes curl extract information about services that are otherwise private and not disclosed (e.g., the attacker can conduct port scans and service banner extractions). (
( CVE-2021-31810) an issue was discovered in ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1.
Net::imap does not raise an exception when starttls fails with an an unknown response, which might allow man-in-the-middle attackers to bypass the tls protections by leveraging a network position between the client and the registry to block the starttls command, aka a "starttls stripping attack." (
( CVE-2021-32066)



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as High - 7.4 severity.
  • CVSS V2 rated as Medium - 5.8 severity.
    • Solution
    Please refer to Amazon advisory: ALAS2RUBY3.0-2023-005 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 356497

    CVE-2021-31810 | CVE-2021-32066 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS2RUBY3.0-2023-005 amazon linux 2 URL Logo alas.aws.amazon.com/AL2/ALASRUBY3.0-2023-005.html
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