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Integer Overflow or Wraparound Affecting lz4-libs package, versions <0:1.8.3-3.el8_4

medium

Snyk CVSS

    Attack Complexity Low
    Availability High
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NVD
9.8 critical
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SUSE
8.6 high
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Red Hat
8.6 high

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  • Snyk ID SNYK-CENTOS8-LZ4LIBS-2113407
  • published 26 Jul 2021
  • disclosed 28 Apr 2021
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Introduced: 28 Apr 2021

CVE-2021-3520 Open this link in a new tab
CWE-190 Open this link in a new tab
CWE-787 Open this link in a new tab

How to fix?

Upgrade Centos:8 lz4-libs to version 0:1.8.3-3.el8_4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream lz4-libs package and not the lz4-libs package as distributed by Centos:8. See How to fix? for Centos:8 relevant fixed versions and status.

There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.