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Integer Overflow or Wraparound Affecting exim4 package, versions <4.94.2-1

0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.05% (14th percentile)
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NVD
7.8 high

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  • Snyk ID SNYK-DEBIAN11-EXIM4-1279386
  • published 5 May 2021
  • disclosed 6 May 2021
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Introduced: 5 May 2021

CVE-2020-28009 Open this link in a new tab
CWE-190 Open this link in a new tab

How to fix?

Upgrade Debian:11 exim4 to version 4.94.2-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream exim4 package and not the exim4 package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

Exim 4 before 4.94.2 allows Integer Overflow to Buffer Overflow because get_stdinput allows unbounded reads that are accompanied by unbounded increases in a certain size variable. NOTE: exploitation may be impractical because of the execution time needed to overflow (multiple days).