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
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2017-1000408
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1524867
Blocks: 1522835
TreeView+ depends on / blocked
 
Reported: 2017-12-06 14:21 UTC by Andrej Nemec
Modified: 2021-02-17 01:09 UTC (History)
14 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2017-12-12 12:41:27 UTC
Embargoed:

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System ID Private Priority Status Summary Last Updated
Sourceware 22606 0 None None None 2017-12-14 12:28:27 UTC

Description Andrej Nemec 2017-12-06 14:21:00 UTC 
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 14:21:05 UTC 
Acknowledgments:

Name: Qualys Research Labs
Comment 2 Andrej Nemec 2017-12-12 09:23:07 UTC 
Public via:

http://seclists.org/oss-sec/2017/q4/385
Comment 3 Andrej Nemec 2017-12-12 09:24:44 UTC 
Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 1524867]
Comment 4 Raphael Sanchez Prudencio 2017-12-12 13:10:19 UTC 
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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