CVE-2013-5211 Denial of service in n/a
Remote attackers can cause denial of service via traffic amplification using forged monlist requests in the NTP daemon.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2013-5211?
CVE-2013-5211 is a medium-severity denial of service vulnerability in Ntp Ntp, published on 2 Jan 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The monlist feature in ntp_request.c in ntpd in NTP before 4.2.7p26 allows remote attackers to cause a denial of service (traffic amplification) via forged (1) REQ_MON_GETLIST or (2) REQ_MON_GETLIST_1 requests, as exploited in the wild in December 2013.
Weakness: CWE-20
Which versions are affected by CVE-2013-5211?
It affects 3 products.
Products include Ntp Ntp, Opensuse Opensuse, Oracle Linux.
How do I fix CVE-2013-5211?
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-2013-5211 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2013-5211 exists.
Public exploit code: 10 Metasploit modules, 1 Exploit-DB entry and 5 proofs of concept on GitHub.
Other vulnerabilities in Ntp Ntp
Sources
Also known as DEBIAN-CVE-2013-5211, GHSA-2q29-vhpq-hpv3, MGASA-2014-0032.