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Red Hat 6 & 7: RHSA-2016-1425-01 Moderate: nginx Security Fix

red hat
Calendar Grey July 14, 2016
Dist Redhat Esm H88
The security bulletin released by Red Hat presents a significant enhancement for rh-nginx18-nginx to address multiple vulnerabilities. Keep yourself updated.
An update for rh-nginx18-nginx is now available for Red Hat Software Collections

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-nginx18-nginx service must be restarted for this update to take effect.

Summary

Nginx is a web and proxy server with a focus on high concurrency, performance, and low memory usage.
The following packages have been upgraded to a newer upstream version: rh-nginx18-nginx (1.8.1).
Security Fix(es):
* A NULL pointer dereference flaw was found in the nginx code responsible for saving client request body to a temporary file. A remote attacker could send a specially crafted request that would cause nginx worker process to crash. (CVE-2016-4450)
* It was discovered that nginx could perform an out of bound read and dereference an invalid pointer when resolving CNAME DNS records. An attacker able to manipulate DNS responses received by nginx could use this flaw to cause a worker process to crash if nginx enabled the resolver in its configuration. (CVE-2016-0742)
* A use-after-free flaw was found in the way nginx resolved certain CNAME DNS records. An attacker able to manipulate DNS responses received by nginx could use this flaw to cause a worker process to crash or, possibly, execute arbitrary code if nginx enabled the resolver in its configuration. (CVE-2016-0746)
* It was discovered that nginx did not limit recursion when resolving CNAME DNS records. An attacker able to manipulate DNS responses received by nginx could use this flaw to cause a worker process to use an excessive amount of resources if nginx enabled the resolver in its configuration. (CVE-2016-0747)

References

https://access.redhat.com/security/cve/CVE-2016-0742 https://access.redhat.com/security/cve/CVE-2016-0746 https://access.redhat.com/security/cve/CVE-2016-0747 https://access.redhat.com/security/cve/CVE-2016-4450 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6):
Source: rh-nginx18-nginx-1.8.1-1.el6.src.rpm
x86_64: rh-nginx18-nginx-1.8.1-1.el6.x86_64.rpm rh-nginx18-nginx-debuginfo-1.8.1-1.el6.x86_64.rpm
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6):
Source: rh-nginx18-nginx-1.8.1-1.el6.src.rpm
x86_64: rh-nginx18-nginx-1.8.1-1.el6.x86_64.rpm rh-nginx18-nginx-debuginfo-1.8.1-1.el6.x86_64.rpm
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7):
Source: rh-nginx18-nginx-1.8.1-1.el6.src.rpm
x86_64: rh-nginx18-nginx-1.8.1-1.el6.x86_64.rpm rh-nginx18-nginx-debuginfo-1.8.1-1.el6.x86_64.rpm
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6):
Source: rh-nginx18-nginx-1.8.1-1.el6.src.rpm
x86_64: rh-nginx18-nginx-1.8.1-1.el6.x86_64.rpm rh-nginx18-nginx-debuginfo-1.8.1-1.el6.x86_64.rpm
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7):
Source: rh-nginx18-nginx-1.8.1-1.el7.src.rpm
x86_64: rh-nginx18-nginx-1.8.1-1.el7.x86_64.rpm rh-nginx18-nginx-debuginfo-1.8.1-1.el7.x86_64.rpm
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.1):
Source: rh-nginx18-nginx-1.8.1-1.el7.src.rpm
x86_64: rh-nginx18-nginx-1.8.1-1.el7.x86_64.rpm rh-nginx18-nginx-debuginfo-1.8.1-1.el7.x86_64.rpm


Read the Full Advisory


Advisory ID: RHSA-2016:1425-01
Product: Red Hat Software Collections
Issue date: 2016-07-14

Topic

An update for rh-nginx18-nginx is now available for Red Hat SoftwareCollections.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Relevant Releases Architectures

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) - x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) - x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6) - x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7) - x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.1) - x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2) - x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) - x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Bugs Fixed

1302587 - CVE-2016-0742 nginx: invalid pointer dereference in resolver

1302588 - CVE-2016-0746 nginx: use-after-free during CNAME response processing in resolver

1302589 - CVE-2016-0747 nginx: Insufficient limits of CNAME resolution in resolver

1341462 - CVE-2016-4450 nginx: NULL pointer dereference while writing client request body

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