Bug 1522828 – CVE-2017-1000408 glibc: Memory leak reachable via LD_HWCAP_MASK

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Bug 1522828 - (CVE-2017-1000408) CVE-2017-1000408 glibc: Memory leak reachable via LD_HWCAP_MASK

Summary:	CVE-2017-1000408 glibc: Memory leak reachable via LD_HWCAP_MASK

Status:	CLOSED NOTABUG

Aliases:	CVE-2017-1000408

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=20171211,reported=2...
Keywords:	Security

Depends On:	1524867
Blocks:	1522835
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Reported:	2017-12-06 09:21 EST by Andrej Nemec
Modified:	2017-12-14 07:28 EST (History)
CC List:	14 users (show)

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Last Closed:	2017-12-12 07:41:27 EST
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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	22606	None	None	None	2017-12-14 07:28 EST

Groups: None (edit)

Description Andrej Nemec 2017-12-06 09:21:00 EST

It was found that a memory leak can be reached and amplified through the LD_HWCAP_MASK environment variable. It's not exploitable if the glibc is patched against CVE-2017-1000366, because this patch ignores the LD_HWCAP_MASK and LD_LIBRARY_PATH environment variables when SUID binaries are executed

Introducing commit:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commit;h=ab7eb292307152e706948a7b19164ff5e6d593d4

Comment 1 Andrej Nemec 2017-12-06 09:21:05 EST

Acknowledgments:

Name: Qualys Research Labs

Comment 2 Andrej Nemec 2017-12-12 04:23:07 EST

Public via:

http://seclists.org/oss-sec/2017/q4/385

Comment 3 Andrej Nemec 2017-12-12 04:24:44 EST

Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 1524867]

Comment 4 Raphael Sanchez Prudencio 2017-12-12 08:10:19 EST

Statement:

This issue did not affect the versions of glibc as shipped with Red Hat Enterprise Linux 5, 6 and 7 after CVE-2017-1000366 fix:

https://access.redhat.com/security/cve/cve-2017-1000366

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