CVE-2009-3563
ntp - denial of service
EPSS 81.1%
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.
How to fix CVE-2009-3563
To remediate CVE-2009-3563, upgrade the affected package to a fixed version below.
- Debian/ntp—upgrade to 1:4.2.4p8+dfsg-1 or later
- Debian/ntp—upgrade to 1:4.2.2.p4+dfsg-2etch4 or later
Is CVE-2009-3563 being exploited?
Likely — EPSS is 81.1%, placing CVE-2009-3563 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (2)
- from 0, < 1:4.2.4p8+dfsg-1
- from 0, < 1:4.2.2.p4+dfsg-2etch4