Race Condition Affecting exim4 package, versions <4.72-1


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-DEBIAN10-EXIM4-382953
  • published7 Jun 2010
  • disclosed7 Jun 2010

Introduced: 7 Jun 2010

CVE-2010-2023  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade Debian:10 exim4 to version 4.72-1 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:10 relevant fixed versions and status.

transports/appendfile.c in Exim before 4.72, when a world-writable sticky-bit mail directory is used, does not verify the st_nlink field of mailbox files, which allows local users to cause a denial of service or possibly gain privileges by creating a hard link to another user's file.

CVSS Scores

version 3.1