CVE-2009-3563 Denial of service in n/a
Remote attackers can cause denial of service in NTP daemons by sending spoofed MODE_PRIVATE packets, triggering infinite error response loops.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2009-3563?
CVE-2009-3563 is a medium-severity denial of service vulnerability in Ntp Ntp, published on 9 Dec 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
ntp_request.c in ntpd in NTP before 4.2.4p8, and 4.2.5, allows remote attackers to cause a denial of service (CPU and bandwidth consumption) by using MODE_PRIVATE to send a spoofed (1) request or (2) response packet that triggers a continuous exchange of MODE_PRIVATE error responses between two NTP daemons.
Which versions are affected by CVE-2009-3563?
It affects 1 product.
Linux distribution packages (12)
ntp Red Hat:enterprise_linux:4::as | All versions | 0:4.2.0.a.20040617-8.el4_8.1 |
ntp-debuginfo Red Hat:enterprise_linux:4::as | All versions | 0:4.2.0.a.20040617-8.el4_8.1 |
ntp Red Hat:enterprise_linux:4::desktop | All versions | 0:4.2.0.a.20040617-8.el4_8.1 |
ntp-debuginfo Red Hat:enterprise_linux:4::desktop | All versions | 0:4.2.0.a.20040617-8.el4_8.1 |
ntp Red Hat:enterprise_linux:4::es | All versions | 0:4.2.0.a.20040617-8.el4_8.1 |
ntp-debuginfo Red Hat:enterprise_linux:4::es | All versions | 0:4.2.0.a.20040617-8.el4_8.1 |
ntp Red Hat:enterprise_linux:4::ws | All versions | 0:4.2.0.a.20040617-8.el4_8.1 |
ntp-debuginfo Red Hat:enterprise_linux:4::ws | All versions | 0:4.2.0.a.20040617-8.el4_8.1 |
ntp Red Hat:enterprise_linux:5::client | All versions | 0:4.2.2p1-9.el5_4.1 |
ntp-debuginfo Red Hat:enterprise_linux:5::client | All versions | 0:4.2.2p1-9.el5_4.1 |
ntp Red Hat:enterprise_linux:5::server | All versions | 0:4.2.2p1-9.el5_4.1 |
ntp-debuginfo Red Hat:enterprise_linux:5::server | All versions | 0:4.2.2p1-9.el5_4.1 |
Products include Ntp Ntp.
How do I fix CVE-2009-3563?
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-2009-3563 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-3563 exists.
Public exploit code: 1 Metasploit module.
Other vulnerabilities in Ntp Ntp
Sources
Also known as DEBIAN-CVE-2009-3563, DSA-1948-1, GHSA-gm22-x89c-4h54, RHSA-2009:1648.