Out-of-bounds Write Affecting exim/exim package, versions [4.00,4.94.2)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.09% (23rd percentile)

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  • Snyk IDSNYK-UNMANAGED-EXIMEXIM-2364565
  • published26 Jan 2022
  • disclosed6 May 2021
  • creditUnknown

Introduced: 6 May 2021

CVE-2020-28013  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade exim/exim to version 4.94.2 or higher.

Overview

Affected versions of this package are vulnerable to Out-of-bounds Write. Exim 4 before 4.94.2 allows Heap-based Buffer Overflow because it mishandles "-F '.('" on the command line, and thus may allow privilege escalation from any user to root. This occurs because of the interpretation of negative sizes in strncpy.

References

CVSS Base Scores

version 3.1