CVE-2009-3563 Affecting ntp package, versions <1:4.2.4p8+dfsg-1


Severity

Recommended
0.0
medium
0
10

Based on Debian security rating

    Threat Intelligence

    EPSS
    96.49% (100th percentile)

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  • Snyk ID SNYK-DEBIAN11-NTP-532103
  • published 9 Dec 2009
  • disclosed 9 Dec 2009

How to fix?

Upgrade Debian:11 ntp to version 1:4.2.4p8+dfsg-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ntp package and not the ntp package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

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.

References

CVSS Scores

version 3.1
Expand this section

NVD

6.5 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    Low
  • Availability (A)
    Low