Описание
Multiple buffer overflows in the ctl_put* functions in NTP before 4.2.8p10 and 4.3.x before 4.3.94 allow remote authenticated users to have unspecified impact via a long variable.
A vulnerability was found in NTP, in the building of response packets with custom fields. If custom fields were configured in ntp.conf with particularly long names, inclusion of these fields in the response packet could cause a buffer overflow, leading to a crash.
Отчет
The security assessment from cure53 clarifies that this issue (identified as NTP-01-0004) is not a vulnerability per se, but a weakness in ntp's internal coding style that may cause a vulnerability if particularly long variable names are defined at compile time. No such variable names are defined in upstream source code, nor in Fedora or Red Hat Enterprise Linux versions of ntp.
Меры по смягчению последствий
Implement BCP-38. If you don't want to upgrade, then don't setvar variable names longer than 200-512 bytes in your ntp.conf file. Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | ntp | Not affected | ||
| Red Hat Enterprise Linux 6 | ntp | Not affected | ||
| Red Hat Enterprise Linux 7 | ntp | Not affected |
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Дополнительная информация
Статус:
EPSS
7.1 High
CVSS3
Связанные уязвимости
Multiple buffer overflows in the ctl_put* functions in NTP before 4.2.8p10 and 4.3.x before 4.3.94 allow remote authenticated users to have unspecified impact via a long variable.
Multiple buffer overflows in the ctl_put* functions in NTP before 4.2.8p10 and 4.3.x before 4.3.94 allow remote authenticated users to have unspecified impact via a long variable.
Multiple buffer overflows in the ctl_put* functions in NTP before 4.2. ...
Multiple buffer overflows in the ctl_put* functions in NTP before 4.2.8p10 and 4.3.x before 4.3.94 allow remote authenticated users to have unspecified impact via a long variable.
EPSS
7.1 High
CVSS3