6.4

CVE-2009-3563: ntp

CVSS: 6.4v2.0MediumModified
AliasesRHSA-2009:1648DEBIAN-CVE-2009-3563DSA-1948-1
Published 09-12-2009Last modified 07-08-2024
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Vulnerability summary

CVE-2009-3563 is a medium (CVSS 6.4) vulnerability in ntp. EPSS estimates a 32.06% chance of exploitation in the next 30 days, higher than 98.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
42/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.4/10
010
Medium · v2.0 (NVD)
EPSS score
32.06%
0%100%
High · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1metasploit

Advisory lineage

Upstream 0 · Downstream 1
RHSA-2009:1651

Timeline

  1. 09-12-2009
    PublishedVulnerability first disclosed.
  2. 07-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

32.06%

Chance of exploitation in the next 30 days

Percentile

98%

Versus all other CVEs

30-day change

0.00 pp

From 32.06% on 18-09-2026

18-09-202618-10-2026
EPSS score
32.06%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • MetasploitMetasploitremoteUnverified

    NTP.org ntpd Reserved Mode Denial of Service

    auxiliary/dos/ntp/ntpd_reserved_dos

    Maturity: poc

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Redhat2 products
  • ntp< 0:4.2.0.a.20040617-8.el4_8.1 | < 0:4.2.2p1-9.el5_4.1
  • ntp-debuginfo< 0:4.2.0.a.20040617-8.el4_8.1 | < 0:4.2.2p1-9.el5_4.1
Debian1 product
  • ntp< 1:4.2.4p8+dfsg-1 | < 1:4.2.2.p4+dfsg-2etch4 | < 1:4.2.4p4+dfsg-8lenny3
Ntp1 product
  • ntp≤ 4.2.2p4 | 4.0.72 | 4.0.73 | 4.0.90 | 4.0.91 | 4.0.92 | 4.0.93 | 4.0.94 | 4.0.95 | 4.0.96 | 4.0.97 | 4.0.98 | 4.0.99 | 4.1.0 | 4.1.2 | 4.2.0 | 4.2.2 | 4.2.2p1 | 4.2.2p2 | 4.2.2p3 | 4.2.5

3 vendors · 4 products

References

49 links
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