Improper Input Validation Affecting dhclient package, versions <12:4.1.1-25.P1.14.amzn1


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
2.15% (90th percentile)

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  • Snyk IDSNYK-AMZN201803-DHCLIENT-1662238
  • published27 Sept 2021
  • disclosed8 Dec 2011

Introduced: 8 Dec 2011

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

How to fix?

Upgrade Amazon-Linux:2018.03 dhclient to version 12:4.1.1-25.P1.14.amzn1 or higher.
This issue was patched in ALAS-2012-31.

NVD Description

Note: Versions mentioned in the description apply only to the upstream dhclient package and not the dhclient package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

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.

CVSS Scores

version 3.1