Описание
A denial of service flaw was found in OpenSSL 0.9.8, 1.0.1, 1.0.2 through 1.0.2h, and 1.1.0 in the way the TLS/SSL protocol defined processing of ALERT packets during a connection handshake. A remote attacker could use this flaw to make a TLS/SSL server consume an excessive amount of CPU and fail to accept connections from other clients.
A denial of service flaw was found in the way the TLS/SSL protocol defined processing of ALERT packets during a connection handshake. A remote attacker could use this flaw to make a TLS/SSL server consume an excessive amount of CPU and fail to accept connections from other clients.
Отчет
This flaw affects applications that are compiled against OpenSSL or GnuTLS and do not allocate an extra thread for processing ClientHello messages. Nginx is affected by this issue; Apache httpd is not affected by this issue. This issue has been rated as having a security impact of Moderate. It requires an attacker to send a very large amount of SSL ALERT messages to the host network connection. This issue can also be mitigated by configuring firewalls to limit the number of connections per IP address, or use deep packet inspection to reject these type of alert packets. A future update may address this issue.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | gnutls | Will not fix | ||
| Red Hat Enterprise Linux 5 | nss | Not affected | ||
| Red Hat Enterprise Linux 5 | openssl | Will not fix | ||
| Red Hat Enterprise Linux 5 | openssl097a | Will not fix | ||
| Red Hat Enterprise Linux 6 | nss | Not affected | ||
| Red Hat Enterprise Linux 6 | openssl098e | Will not fix | ||
| Red Hat Enterprise Linux 7 | gnutls | Will not fix | ||
| Red Hat Enterprise Linux 7 | nss | Not affected | ||
| Red Hat Enterprise Linux 7 | openssl098e | Will not fix | ||
| Red Hat JBoss Enterprise Web Server 1 | openssl | Will not fix |
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Дополнительная информация
Статус:
7.5 High
CVSS3
4.3 Medium
CVSS2
Связанные уязвимости
A denial of service flaw was found in OpenSSL 0.9.8, 1.0.1, 1.0.2 through 1.0.2h, and 1.1.0 in the way the TLS/SSL protocol defined processing of ALERT packets during a connection handshake. A remote attacker could use this flaw to make a TLS/SSL server consume an excessive amount of CPU and fail to accept connections from other clients.
A denial of service flaw was found in OpenSSL 0.9.8, 1.0.1, 1.0.2 through 1.0.2h, and 1.1.0 in the way the TLS/SSL protocol defined processing of ALERT packets during a connection handshake. A remote attacker could use this flaw to make a TLS/SSL server consume an excessive amount of CPU and fail to accept connections from other clients.
A denial of service flaw was found in OpenSSL 0.9.8, 1.0.1, 1.0.2 thro ...
A denial of service flaw was found in OpenSSL 0.9.8, 1.0.1, 1.0.2 through 1.0.2h, and 1.1.0 in the way the TLS/SSL protocol defined processing of ALERT packets during a connection handshake. A remote attacker could use this flaw to make a TLS/SSL server consume an excessive amount of CPU and fail to accept connections from other clients.
7.5 High
CVSS3
4.3 Medium
CVSS2