Improper Input Validation Affecting dhcp package, versions [,4.2.3)


Severity

Recommended
0.0
medium
0
10

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

Threat Intelligence

EPSS
2.15% (90th percentile)

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  • Snyk IDSNYK-UNMANAGED-DHCP-2374397
  • published26 Jan 2022
  • disclosed8 Dec 2011
  • creditUnknown

Introduced: 8 Dec 2011

CVE-2011-4539  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade dhcp to version 4.2.3 or higher.

Overview

Affected versions of this package are vulnerable to Improper Input Validation dhcpd in ISC DHCP 4.x before 4.2.3-P1 and 4.1-ESV before 4.1-ESV-R4 does not properly handle regular expressions in dhcpd.conf, which allows remote attackers to cause a denial of service (daemon crash) via a crafted request packet.

References

CVSS Scores

version 3.1