Описание
The "pidfile" or "driftfile" directives in NTP ntpd 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77, when ntpd is configured to allow remote configuration, allows remote attackers with an IP address that is allowed to send configuration requests, and with knowledge of the remote configuration password to write to arbitrary files via the :config command.
It was found that NTP's :config command could be used to set the pidfile and driftfile paths without any restrictions. A remote attacker could use this flaw to overwrite a file on the file system with a file containing the pid of the ntpd process (immediately) or the current estimated drift of the system clock (in hourly intervals).
Меры по смягчению последствий
Disable remote runtime configuration with ntpq or ntpdc. In the default NTP configuration on Red Hat Enterprise Linux, runtime configuration with ntpq or ntpdc is limited to localhost.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | ntp | Will not fix | ||
| Red Hat Enterprise Linux 6 | ntp | Fixed | RHSA-2016:0780 | 10.05.2016 |
| Red Hat Enterprise Linux 7 | ntp | Fixed | RHSA-2016:2583 | 03.11.2016 |
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Дополнительная информация
Статус:
EPSS
4 Medium
CVSS2
Связанные уязвимости
The "pidfile" or "driftfile" directives in NTP ntpd 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77, when ntpd is configured to allow remote configuration, allows remote attackers with an IP address that is allowed to send configuration requests, and with knowledge of the remote configuration password to write to arbitrary files via the :config command.
The "pidfile" or "driftfile" directives in NTP ntpd 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77, when ntpd is configured to allow remote configuration, allows remote attackers with an IP address that is allowed to send configuration requests, and with knowledge of the remote configuration password to write to arbitrary files via the :config command.
The "pidfile" or "driftfile" directives in NTP ntpd 4.2.x before 4.2.8 ...
The "pidfile" or "driftfile" directives in NTP ntpd 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77, when ntpd is configured to allow remote configuration, allows remote attackers with an IP address that is allowed to send configuration requests, and with knowledge of the remote configuration password to write to arbitrary files via the :config command.
ELSA-2016-0780: ntp security and bug fix update (MODERATE)
EPSS
4 Medium
CVSS2