Loop with Unreachable Exit Condition ('Infinite Loop') Affecting exim4 package, versions <4.89-13


0.0
high

Snyk CVSS

    Attack Complexity Low
    Availability High
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NVD
7.5 high

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  • Snyk ID SNYK-DEBIAN12-EXIM4-1545048
  • published 25 Nov 2017
  • disclosed 25 Nov 2017

How to fix?

Upgrade Debian:12 exim4 to version 4.89-13 or higher.

NVD Description

Note: Versions mentioned in the description apply to the upstream exim4 package. See How to fix? for Debian:12 relevant versions.

The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to cause a denial of service (infinite loop and stack exhaustion) via vectors involving BDAT commands and an improper check for a '.' character signifying the end of the content, related to the bdat_getc function.