Описание
Simultaneous Multi-threading (SMT) in processors can enable local users to exploit software vulnerable to timing attacks via a side-channel timing attack on 'port contention'.
A microprocessor side-channel vulnerability was found on SMT (e.g, Hyper-Threading) architectures. An attacker running a malicious process on the same core of the processor as the victim process can extract certain secret information.
Отчет
This is a timing side-channel flaw on processors which implement SMT/Hyper-Threading architectures. It can result in leakage of secret data in applications such as OpenSSL that has secret dependent control flow at any granularity level. In order to exploit this flaw, the attacker needs to run a malicious process on the same core of the processor as the victim process.
Меры по смягчению последствий
At this time Red Hat Engineering is working on patches for openssl package in Red Hat Enterprise Linux 7 to address this issue. Until fixes are available, users are advised to review the guidance supplied in the L1 Terminal Fault vulnerability article: https://access.redhat.com/security/vulnerabilities/L1TF and decide what their exposure across shared CPU threads are and act accordingly.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | openssl | Will not fix | ||
| Red Hat Enterprise Linux 5 | openssl097a | Will not fix | ||
| Red Hat Enterprise Linux 6 | openssl | Will not fix | ||
| Red Hat Enterprise Linux 6 | openssl098e | Will not fix | ||
| Red Hat Enterprise Linux 7 | openssl098e | Will not fix | ||
| Red Hat Enterprise Linux 8 | compat-openssl10 | Will not fix | ||
| Red Hat Enterprise Linux 8 | openssl | Not affected | ||
| Red Hat JBoss Enterprise Application Platform 5 | openssl | Will not fix | ||
| Red Hat JBoss Enterprise Application Platform 6 | openssl | Will not fix | ||
| Red Hat JBoss Enterprise Web Server 2 | openssl | Will not fix |
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Дополнительная информация
Статус:
EPSS
4.8 Medium
CVSS3
Связанные уязвимости
Simultaneous Multi-threading (SMT) in processors can enable local users to exploit software vulnerable to timing attacks via a side-channel timing attack on 'port contention'.
Simultaneous Multi-threading (SMT) in processors can enable local users to exploit software vulnerable to timing attacks via a side-channel timing attack on 'port contention'.
Simultaneous Multi-threading (SMT) in processors can enable local user ...
Simultaneous Multi-threading (SMT) in processors can enable local users to exploit software vulnerable to timing attacks via a side-channel timing attack on 'port contention'.
ELSA-2019-0483: openssl security and bug fix update (MODERATE)
EPSS
4.8 Medium
CVSS3