VAR-201811-0986

Vulnerability from variot - Updated: 2023-12-18 11:39

nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive CPU usage. 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. nginx Contains a resource exhaustion vulnerability.Service operation interruption (DoS) There is a possibility of being put into a state. nginx is prone to multiple denial-of-service vulnerabilities. Attackers can exploit these issues to cause denial-of-service conditions. Versions prior to nginx 1.15.6 and 1.14.1 are vulnerable. nginx is a lightweight web server/reverse proxy server and email (IMAP/POP3) proxy server developed by Russian programmer Igor Sysoev.

For the stable distribution (stretch), these problems have been fixed in version 1.10.3-1+deb9u2.

We recommend that you upgrade your nginx packages. ========================================================================== Ubuntu Security Notice USN-3812-1 November 07, 2018

nginx vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

Ubuntu 18.10
Ubuntu 18.04 LTS
Ubuntu 16.04 LTS
Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in nginx.

Software Description: - nginx: small, powerful, scalable web/proxy server

Details:

It was discovered that nginx incorrectly handled the HTTP/2 implementation. A remote attacker could possibly use this issue to cause excessive memory consumption, leading to a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-16843)

Gal Goldshtein discovered that nginx incorrectly handled the HTTP/2 implementation. A remote attacker could possibly use this issue to cause excessive CPU usage, leading to a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-16844)

It was discovered that nginx incorrectly handled the ngx_http_mp4_module module. A remote attacker could possibly use this issue with a specially crafted mp4 file to cause nginx to crash, stop responding, or access arbitrary memory. (CVE-2018-16845)

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 18.10: nginx-common 1.15.5-0ubuntu2.1 nginx-core 1.15.5-0ubuntu2.1 nginx-extras 1.15.5-0ubuntu2.1 nginx-full 1.15.5-0ubuntu2.1 nginx-light 1.15.5-0ubuntu2.1

Ubuntu 18.04 LTS: nginx-common 1.14.0-0ubuntu1.2 nginx-core 1.14.0-0ubuntu1.2 nginx-extras 1.14.0-0ubuntu1.2 nginx-full 1.14.0-0ubuntu1.2 nginx-light 1.14.0-0ubuntu1.2

Ubuntu 16.04 LTS: nginx-common 1.10.3-0ubuntu0.16.04.3 nginx-core 1.10.3-0ubuntu0.16.04.3 nginx-extras 1.10.3-0ubuntu0.16.04.3 nginx-full 1.10.3-0ubuntu0.16.04.3 nginx-light 1.10.3-0ubuntu0.16.04.3

Ubuntu 14.04 LTS: nginx-common 1.4.6-1ubuntu3.9 nginx-core 1.4.6-1ubuntu3.9 nginx-extras 1.4.6-1ubuntu3.9 nginx-full 1.4.6-1ubuntu3.9 nginx-light 1.4.6-1ubuntu3.9

In general, a standard system update will make all the necessary changes. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256

====================================================================
Red Hat Security Advisory

Synopsis: Important: rh-nginx114-nginx security update Advisory ID: RHSA-2018:3681-01 Product: Red Hat Software Collections Advisory URL: https://access.redhat.com/errata/RHSA-2018:3681 Issue date: 2018-11-27 CVE Names: CVE-2018-16843 CVE-2018-16844 CVE-2018-16845 ==================================================================== 1. Summary:

An update for rh-nginx114-nginx is now available for Red Hat Software Collections.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Relevant releases/architectures:

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64le, s390x, x86_64 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) - ppc64le, s390x, x86_64 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) - ppc64le, s390x, x86_64 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) - ppc64le, s390x, x86_64 Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Description:

nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage.

The following packages have been upgraded to a later upstream version: rh-nginx114-nginx (1.14.1).

Red Hat would like to thank the Nginx project for reporting these issues.

Solution:

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The rh-nginx114-nginx service must be restarted for this update to take effect.

Package List:

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7):