Race Condition Affecting curl package, versions <8.1.0-r0


0.0
medium

Snyk CVSS

    Attack Complexity High
    Availability High

    Threat Intelligence

    EPSS 0.1% (40th percentile)
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NVD
5.9 medium
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SUSE
3.7 low
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Red Hat
3.7 low

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  • Snyk ID SNYK-ALPINE315-CURL-5561306
  • published 17 May 2023
  • disclosed 26 May 2023

How to fix?

Upgrade Alpine:3.15 curl to version 8.1.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Alpine. See How to fix? for Alpine:3.15 relevant fixed versions and status.

A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names, selected at build time. If it is built to use the synchronous resolver, it allows name resolves to time-out slow operations using alarm() and siglongjmp(). When doing this, libcurl used a global buffer that was not mutex protected and a multi-threaded application might therefore crash or otherwise misbehave.