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High ALAS2-2023-2127 1 CVE

Important: c-ares security update (Amazon Linux 2)

Published Jul 17, 2023 · Updated Jul 19, 2023

Ecosystem: Amazon Linux

Summary

Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2023-32067: Denial of Service. Attack Steps: The target resolver sends a query The attacker forges a malformed UDP packet with a length of 0 and returns them to the target resolver The target resolver erroneously interprets the 0 length as a graceful shutdown of the connection. (this is only valid for TCP connections, UDP is connection-less) Current resolution fails, DoS attack is achieved.

Fixed packages 3

ReleasePackageFixed in
Amazon Linux · 2 c-ares 0:1.10.0-3.amzn2.0.3
Amazon Linux · 2 c-ares-debuginfo 0:1.10.0-3.amzn2.0.3
Amazon Linux · 2 c-ares-devel 0:1.10.0-3.amzn2.0.3

Vulnerabilities 1

  • High 7.5
    CVE-2023-32067

    0-byte UDP payload DoS in c-ares

    c-ares is an asynchronous resolver library. c-ares is vulnerable to denial of service. If a target resolver sends a query, the attacker forges a malformed UDP packet with a length of 0 and returns them to the target resolver. The target resolver erroneously i…

    c-ares c-ares nodejs nodejs18 Debian Ubuntu Azure Linux Wolfi

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2023-32067.html