Bug 1330887 – CVE-2016-3706 glibc: stack (frame) overflow in getaddrinfo() when called with AF_INET, AF_INET6 (incomplete fix for CVE-2013-4458)

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Bug 1330887 - (CVE-2016-3706) CVE-2016-3706 glibc: stack (frame) overflow in getaddrinfo() when called with AF_INET, AF_INET6 (incomplete fix for CVE-2013-4458)

Summary:	CVE-2016-3706 glibc: stack (frame) overflow in getaddrinfo() when called with...

Status:	CLOSED WONTFIX

Aliases:	CVE-2016-3706

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
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URL:
Whiteboard:	impact=low,public=20160427,reported=2...
Keywords:	Security

Depends On:	1329674 1330888
Blocks:
	Show dependency tree / graph

Reported:	2016-04-27 04:56 EDT by Martin Prpič
Modified:	2016-11-10 14:58 EST (History)
CC List:	14 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
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Environment:
Last Closed:	2016-04-27 04:57:32 EDT
Type:	---
Regression:	---
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Sourceware	20010	None	None	None	2016-04-27 05:28 EDT

Groups: None (edit)

Description Martin Prpič 2016-04-27 04:56:25 EDT

It was found that the fix for CVE-2013-4458 is incomplete. 

A stack (frame) overflow flaw, which could led to a denial of service (application crash), was found in the way glibc's getaddrinfo() function processed certain requests when called with AF_INET or AF_INET6.

This is less substantial than the CVE-2013-4458 issue because there is an other, unfixed bug in nss_files which causes it to use gigabytes of stack space with "multi on" (our default) in /etc/host.conf. Only about 4096 addresses fit into a DNS reply, so this is not really exploitable via nss_dns (only in fringe cases with extremely small stacks, as sometimes seen with Java VMs).

Comment 1 Martin Prpič 2016-04-27 04:56:37 EDT

Acknowledgments:

Name: Michael Petlan (Red Hat)

Comment 2 Martin Prpič 2016-04-27 04:57:01 EDT

Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 1330888]

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