Out-of-bounds Read Affecting exim4 package, versions <4.94.2-1


0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High

    Threat Intelligence

    EPSS 0.17% (53rd percentile)
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NVD
7.5 high

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  • Snyk ID SNYK-DEBIAN11-EXIM4-1279452
  • published 5 May 2021
  • disclosed 6 May 2021

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 Out-of-bounds Read because pdkim_finish_bodyhash does not validate the relationship between sig->bodyhash.len and b->bh.len; thus, a crafted DKIM-Signature header might lead to a leak of sensitive information from process memory.