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.
Find out more about CVE-2016-8610 from the MITRE CVE dictionary dictionary and NIST NVD.
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.
| Base Score | 4.3 |
|---|---|
| Base Metrics | AV:N/AC:M/Au:N/C:N/I:N/A:P |
| Access Vector | Network |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Partial |
| CVSS3 Base Score | 7.5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | None |
| Availability Impact | High |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat JBoss Enterprise Application Platform 6.4 | RHSA-2017:1659 | 2017-06-28 |
| Red Hat JBoss Enterprise Application Platform 6 for RHEL 6 Server (jbcs-httpd24-openssl) | RHSA-2017:1658 | 2017-06-28 |
| Red Hat JBoss Web Server 3.1 for RHEL 6 | RHSA-2017:1801 | 2017-07-25 |
| Red Hat Enterprise Linux 6 (gnutls) | RHSA-2017:0574 | 2017-03-21 |
| Red Hat JBoss Web Server 3.1 for RHEL 7 | RHSA-2017:1801 | 2017-07-25 |
| Red Hat JBoss Enterprise Web Server 2 for RHEL 7 Server | RHSA-2017:2493 | 2017-08-21 |
| Red Hat JBoss Core Services on RHEL 6 Server | RHSA-2017:1414 | 2017-06-07 |
| Red Hat JBoss Web Server 3.1 | RHSA-2017:1802 | 2017-07-25 |
| Red Hat JBoss Enterprise Web Server 2 for RHEL 6 Server | RHSA-2017:2493 | 2017-08-21 |
| Red Hat JBoss Core Services 1 | RHSA-2017:1415 | 2017-06-07 |
| Red Hat JBoss Core Services on RHEL 7 Server | RHSA-2017:1413 | 2017-06-07 |
| Red Hat Enterprise Linux 7 (openssl) | RHSA-2017:0286 | 2017-02-20 |
| Red Hat Enterprise Linux 6 (openssl) | RHSA-2017:0286 | 2017-02-20 |
| Red Hat JBoss Enterprise Application Platform 6.3 for RHEL 7 Server (jbcs-httpd24-openssl) | RHSA-2017:1658 | 2017-06-28 |
| Red Hat JBoss Web Server 2.1 | RHSA-2017:2494 | 2017-08-21 |
| Platform | Package | State |
|---|---|---|
| Red Hat JBoss Web Server 3.0 | openssl | Fix deferred |
| Red Hat JBoss EWS 1 | openssl | Will not fix |
| Red Hat Enterprise Linux 7 | openssl098e | Will not fix |
| Red Hat Enterprise Linux 7 | nss | Not affected |
| Red Hat Enterprise Linux 7 | gnutls | Will not fix |
| Red Hat Enterprise Linux 6 | nss | Not affected |
| Red Hat Enterprise Linux 6 | openssl098e | Will not fix |
| Red Hat Enterprise Linux 5 | openssl | Will not fix |
| Red Hat Enterprise Linux 5 | openssl097a | Will not fix |
| Red Hat Enterprise Linux 5 | nss | Not affected |
| Red Hat Enterprise Linux 5 | gnutls | Will not fix |
Vulmon