nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive memory consumption. This issue affects nginx compiled with the ngx_http_v2_module (not compiled by default) if the 'http2' option of the 'listen' directive is used in a configuration file.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-16843 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue did not affect the versions of rh-nginx18-nginx as shipped with Red Hat Software Collections as they did not include the vulnerable module ngx_http_v2_module.
| CVSS3 Base Score | 5.3 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | None |
| Availability Impact | Low |
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Software Collections for Red Hat Enterprise Linux 7 (rh-nginx112-nginx) | RHSA-2018:3680 | 2018-11-27 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 (rh-nginx114-nginx) | RHSA-2018:3681 | 2018-11-27 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 (rh-nginx110-nginx) | RHSA-2018:3653 | 2018-11-26 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 (rh-nginx110-nginx) | RHSA-2018:3653 | 2018-11-26 |
| Platform | Package | State |
|---|---|---|
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-nginx18-nginx | Not affected |
| Red Hat Ansible Tower 3 for RHEL 7 | nginx | Not affected |
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