Red Hat update for ISC DHCP

1) Resource exhaustion

EUVDB-ID: #VU10031

Risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:W/RC:C]

CVE-ID: CVE-2017-3144

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to improper cleaning up of closed OMAPI connections. A remote attacker who is permitted to establish connections to the OMAPI control port can trigger exhaustion of the pool of socket descriptors available to the DHCP server and cause the service to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux for x86_64: 7.0

External links

http://access.redhat.com/errata/RHSA-2018:0158

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.