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

Severity

 Recommended
medium

Based on Amazon Linux security rating

    Threat Intelligence

    EPSS
    0.69% (81st percentile)

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  • Snyk ID SNYK-AMZN2-LIBCURL-2315499
  • published 11 Dec 2021
  • disclosed 23 Sep 2021
Report a new vulnerability Found a mistake?

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 libcurl 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 libcurl package and not the libcurl 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

CVSS Scores

version 3.1
Expand this section

NVD

9.1 critical
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    None
  • Availability (A)
    High
Expand this section

Red Hat

9.1 critical