Описание
authfile.c in sshd in OpenSSH before 7.4 does not properly consider the effects of realloc on buffer contents, which might allow local users to obtain sensitive private-key information by leveraging access to a privilege-separated child process.
It was found that the host private key material could possibly leak to the privilege-separated child processes via re-allocated memory. An attacker able to compromise the privilege-separated process could therefore obtain the leaked key information.
Отчет
It seems that this flaw is not practically exploitable, the leak of host private key material to the privilege-separated child processes is theoretical. No such leak was observed in practice for normal-sized keys, nor does a leak to the child processes directly expose key material to unprivileged users. Because of the this restriction for successful exploitation, this issue has been rated as having Low security impact. A future update may address this flaw.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 4 | openssh | Will not fix | ||
| Red Hat Enterprise Linux 5 | openssh | Will not fix | ||
| Red Hat Enterprise Linux 6 | openssh | Fix deferred | ||
| Red Hat Enterprise Linux 7 | openssh | Fixed | RHSA-2017:2029 | 01.08.2017 |
Показывать по
Дополнительная информация
Статус:
EPSS
2.5 Low
CVSS3
1 Low
CVSS2
Связанные уязвимости
authfile.c in sshd in OpenSSH before 7.4 does not properly consider the effects of realloc on buffer contents, which might allow local users to obtain sensitive private-key information by leveraging access to a privilege-separated child process.
authfile.c in sshd in OpenSSH before 7.4 does not properly consider the effects of realloc on buffer contents, which might allow local users to obtain sensitive private-key information by leveraging access to a privilege-separated child process.
authfile.c in sshd in OpenSSH before 7.4 does not properly consider th ...
authfile.c in sshd in OpenSSH before 7.4 does not properly consider the effects of realloc on buffer contents, which might allow local users to obtain sensitive private-key information by leveraging access to a privilege-separated child process.
Уязвимость компонента authfile.c службы sshd средства криптографической защиты OpenSSH, позволяющая нарушителю получить несанкционированный доступ к защищаемой информации
EPSS
2.5 Low
CVSS3
1 Low
CVSS2