Code Affecting ntp package, versions <1:4.2.6.p5+dfsg-6


Severity

Recommended
0.0
low
0
10

Snyk's Security Team recommends NVD's CVSS assessment

    Threat Intelligence

    EPSS
    0.63% (80th percentile)

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  • Snyk ID SNYK-DEBIAN11-NTP-517166
  • published 8 Apr 2015
  • disclosed 8 Apr 2015

How to fix?

Upgrade Debian:11 ntp to version 1:4.2.6.p5+dfsg-6 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.

The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.

References

CVSS Scores

version 3.1
Expand this section

NVD

3.1 low
  • Attack Vector (AV)
    Adjacent
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    Low
  • Availability (A)
    None
Expand this section

Red Hat

3.7 low