Medium: dhcp

Issue Overview:

Omapi code doesn’t free socket descriptors when empty message is received allowing denial-of-service
It was found that the DHCP daemon did not properly clean up closed OMAPI connections in certain cases. A remote attacker able to connect to the OMAPI port could use this flaw to exhaust file descriptors in the DHCP daemon, leading to a denial of service in the OMAPI functionality.(CVE-2017-3144)

Affected Packages:

dhcp

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update dhcp to update your system.

New Packages:

src:  
    dhcp-4.2.5-58.amzn2.1.2.src  
  
x86_64:  
    dhcp-4.2.5-58.amzn2.1.2.x86_64  
    dhclient-4.2.5-58.amzn2.1.2.x86_64  
    dhcp-common-4.2.5-58.amzn2.1.2.x86_64  
    dhcp-libs-4.2.5-58.amzn2.1.2.x86_64  
    dhcp-devel-4.2.5-58.amzn2.1.2.x86_64  
    dhcp-debuginfo-4.2.5-58.amzn2.1.2.x86_64  

Additional References

Red Hat: CVE-2017-3144

Mitre: CVE-2017-3144