Bug 1302587 (CVE-2016-0742) - CVE-2016-0742 nginx: invalid pointer dereference in resolver
Summary: CVE-2016-0742 nginx: invalid pointer dereference in resolver
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2016-0742
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1302334 1302337 1302592 1302599 1342443
Blocks: 1302591
TreeView+ depends on / blocked
 
Reported: 2016-01-28 08:40 UTC by Martin Prpič
Modified: 2021-02-17 04:25 UTC (History)
12 users (show)

Fixed In Version: nginx 1.9.10, nginx 1.8.1
Doc Type: Bug Fix
Doc Text:
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.
Clone Of:
Environment:
Last Closed: 2016-07-14 11:20:58 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:1425 0 normal SHIPPED_LIVE Moderate: rh-nginx18-nginx security update 2016-07-14 09:50:00 UTC

Description Martin Prpič 2016-01-28 08:40:49 UTC 
The following flaw was found in the nginx resolver:

Invalid pointer dereference might occur during DNS server response processing, allowing an attacker who is able to forge UDP packets from the DNS server to cause worker process crash.

This issue affects nginx only if the "resolver" directive is used in a configuration file.

The problems are fixed in nginx upstream versions 1.9.10 and 1.8.1.

External References:

http://mailman.nginx.org/pipermail/nginx-announce/2016/000169.html
Comment 1 Martin Prpič 2016-01-28 08:45:01 UTC 
Created nginx tracking bugs for this issue:

Affects: fedora-all [bug 1302592]
Comment 2 Tomas Hoger 2016-02-08 20:21:26 UTC 
Upstream commit:

https://trac.nginx.org/nginx/changeset/c36482d0a79fe0f2e1467f80ec2fbcd0a2d682c6/nginx
Comment 3 Tomas Hoger 2016-02-10 21:44:26 UTC 
Bug 1302589 comment 3 as few notes on how nginx resolver is used.
Comment 6 errata-xmlrpc 2016-07-14 05:50:16 UTC 
This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS

Via RHSA-2016:1425 https://access.redhat.com/errata/RHSA-2016:1425
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