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archlinuxArch LinuxASA-201507-5
HistoryJul 07, 2015 - 12:00 a.m.

ntp: denial of service

2015-07-0700:00:00
Arch Linux
lists.archlinux.org
15

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

3.5 Low

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:S/C:N/I:N/A:P

0.01 Low

EPSS

Percentile

82.1%

Under limited and specific circumstances an attacker can send a crafted
remote-configuration packet containing a NUL-byte to cause a vulnerable
ntpd instance to crash. This requires each of the following to be true:

  • ntpd set up to allow for remote configuration (not allowed by
    default)
  • knowledge of the configuration password
  • access to a computer entrusted to perform remote configuration
OSVersionArchitecturePackageVersionFilename
anyanyanyntp< 4.2.8.p3-1UNKNOWN

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

3.5 Low

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:S/C:N/I:N/A:P

0.01 Low

EPSS

Percentile

82.1%