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Double Free Affecting curl package, versions <0:7.79.1-1.amzn2.0.1

medium

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Availability High

    Threat Intelligence

    EPSS 0.4% (74th percentile)
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NVD
9.1 critical
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Red Hat
9.1 critical

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  • Snyk ID SNYK-AMZN2-CURL-2315471
  • published 11 Dec 2021
  • disclosed 23 Sep 2021
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Introduced: 23 Sep 2021

CVE-2021-22945 Open this link in a new tab
CWE-415 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 curl to version 0:7.79.1-1.amzn2.0.1 or higher.
This issue was patched in ALAS2-2021-1724.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it again.

References