Double Free Affecting curl package, versions <7.79.0-r0


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
0.69% (81st percentile)

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  • Snyk IDSNYK-ALPINE311-CURL-1585255
  • published15 Sept 2021
  • disclosed23 Sept 2021

Introduced: 15 Sep 2021

CVE-2021-22945  (opens in a new tab)
CWE-415  (opens in a new tab)

How to fix?

Upgrade Alpine:3.11 curl to version 7.79.0-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:3.11 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.

CVSS Scores

version 3.1