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Medium ALAS2023-2025-942 1 CVE

Moderate: nodejs20 security update (Amazon Linux 2023)

Published Apr 23, 2025 · Updated Apr 29, 2025

Summary

Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2025-31498: c-ares is an asynchronous resolver library. From 1.32.3 through 1.34.4, there is a use-after-free in read_answers() when process_answer() may re-enqueue a query either due to a DNS Cookie Failure or when the upstream server does not properly support EDNS, or possibly on TCP queries if the remote closed the connection immediately after a response. If there was an issue trying to put that new transaction on the wire, it would close the connection handle, but read_answers() was still expecting the connection handle to be available to possibly dequeue other responses. In theory a remote attacker might be able to trigger this by flooding the target with ICMP UNREACHABLE packets if they also control the upstream nameserver and can return a result with one of those conditions, this has been untested. Otherwise only a local attacker might be able to change system behavior to make send()/write() return a failure condition. This vulnerability is fixed in 1.34.5.

Fixed packages 10

ReleasePackageFixed in
Amazon Linux · 2023 nodejs20 1:20.19.0-1.amzn2023.0.1
Amazon Linux · 2023 nodejs20-debuginfo 1:20.19.0-1.amzn2023.0.1
Amazon Linux · 2023 nodejs20-debugsource 1:20.19.0-1.amzn2023.0.1
Amazon Linux · 2023 nodejs20-devel 1:20.19.0-1.amzn2023.0.1
Amazon Linux · 2023 nodejs20-docs 1:20.19.0-1.amzn2023.0.1
Amazon Linux · 2023 nodejs20-full-i18n 1:20.19.0-1.amzn2023.0.1
Amazon Linux · 2023 nodejs20-libs 1:20.19.0-1.amzn2023.0.1
Amazon Linux · 2023 nodejs20-libs-debuginfo 1:20.19.0-1.amzn2023.0.1
Amazon Linux · 2023 nodejs20-npm 1:10.8.2-1.20.19.0.1.amzn2023.0.1
Amazon Linux · 2023 v8-11.3-devel 3:11.3.244.8-1.20.19.0.1.amzn2023.0.1

Vulnerabilities 1

  • High 8.3

    c-ares has a use-after-free in read_answers()

    c-ares is an asynchronous resolver library. From 1.32.3 through 1.34.4, there is a use-after-free in read_answers() when process_answer() may re-enqueue a query either due to a DNS Cookie Failure or when the upstream server does not properly support EDNS, or …

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-31498.html