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Amazon Linux AMI: Security patch for ntp (ALAS-2015-520) (multiple CVEs)

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Amazon Linux AMI: Security patch for ntp (ALAS-2015-520) (multiple CVEs)

Severity
4
CVSS
(AV:A/AC:M/Au:N/C:N/I:P/A:P)
Published
04/08/2015
Created
07/25/2018
Added
05/07/2015
Modified
07/04/2017

Description

The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service (synchronization loss) by spoofing the source IP address of a peer.

Solution(s)

  • amazon-linux-upgrade-ntp
  • amazon-linux-upgrade-ntp-debuginfo
  • amazon-linux-upgrade-ntp-doc
  • amazon-linux-upgrade-ntp-perl
  • amazon-linux-upgrade-ntpdate

References

  • amazon-linux-upgrade-ntp
  • amazon-linux-upgrade-ntp-debuginfo
  • amazon-linux-upgrade-ntp-doc
  • amazon-linux-upgrade-ntp-perl
  • amazon-linux-upgrade-ntpdate

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