CVE-2015-7705 Denial of service in n/a

Critical 9.8 Published 7 Aug 2017 Updated 6 Aug 2024

Remote attackers can cause denial of service in NTP servers by sending a large number of crafted requests, bypassing rate limiting mechanisms.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2015-7705?

CVE-2015-7705 is a critical denial of service vulnerability in Citrix Xenserver, published on 7 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The rate limiting feature in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to have unspecified impact via a large number of crafted requests.

Weakness: CWE-20

Which versions are affected by CVE-2015-7705?

It affects 8 products.

Products include Citrix Xenserver, Netapp Clustered Data Ontap, Netapp Data Ontap, Netapp Oncommand Performance Manager, Netapp Oncommand Unified Manager, Ntp Ntp and 2 more.

How do I fix CVE-2015-7705?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2015-7705 being exploited?

There is no known exploitation of CVE-2015-7705 in the wild and no public exploit code.

All Citrix Xenserver vulnerabilities

Sources

Also known as DEBIAN-CVE-2015-7705, GHSA-xj8r-mpwc-m649, UBUNTU-CVE-2015-7705.