A flaw was found in the way httpd performed client authentication using X.509 client certificates. When the HTTP/2 protocol was enabled, a remote attacker could use this flaw to access resources protected by certificate authentication without providing a valid client certificate.
Find out more about CVE-2016-4979 from the MITRE CVE dictionary dictionary and NIST NVD.
| Base Score | 5.8 |
|---|---|
| Base Metrics | AV:N/AC:M/Au:N/C:P/I:P/A:N |
| Access Vector | Network |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | Partial |
| Integrity Impact | Partial |
| Availability Impact | None |
| CVSS3 Base Score | 9.1 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity Impact | High |
| Availability Impact | None |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Software Collections for Red Hat Enterprise Linux 6 (httpd24-httpd) | RHSA-2016:1420 | 2016-07-18 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 (httpd24-httpd) | RHSA-2016:1420 | 2016-07-18 |
| Platform | Package | State |
|---|---|---|
| Red Hat JBoss Web Server 3.0 | httpd | Not affected |
| Red Hat JBoss EWS 2 | httpd | Not affected |
| Red Hat JBoss EWS 1 | httpd | Not affected |
| Red Hat JBoss EAP 6 | httpd22 | Not affected |
| Red Hat JBoss EAP 6 | httpd | Not affected |
| Red Hat JBoss EAP 5 | httpd | Not affected |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-httpd | Not affected |
| Red Hat Enterprise Linux 7 | httpd | Not affected |
| Red Hat Enterprise Linux 6 | httpd | Not affected |
| Red Hat Enterprise Linux 5 | httpd | Not affected |
| Red Hat Directory Server 8 | httpd | Not affected |
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