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Bug 1581269 - (CVE-2018-11236) CVE-2018-11236 glibc: Integer overflow in stdlib/canonicalize.c on 32-bit architectures leading to stack-based buffer overflow
CVE-2018-11236 glibc: Integer overflow in stdlib/canonicalize.c on 32-bit arc...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20180204,repor...
: Security
Depends On: 1581271 1579742 1581270 1581881 1581882 1582343 1582344
Blocks: 1581279
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Reported: 2018-05-22 08:49 EDT by Andrej Nemec
Modified: 2018-10-30 03:36 EDT (History)
20 users (show)

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Fixed In Version: glibc 2.28
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External Trackers
Tracker ID Priority Status Summary Last Updated
Sourceware 22786 None None None 2018-05-24 06:16 EDT
Red Hat Product Errata RHSA-2018:3092 None None None 2018-10-30 03:36 EDT

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Description Andrej Nemec 2018-05-22 08:49:42 EDT 
stdlib/canonicalize.c in the GNU C Library (aka glibc or libc6) 2.27 and earlier, when processing very long pathname arguments to the realpath function, could encounter an integer overflow on 32-bit architectures, leading to a stack-based buffer overflow and, potentially, arbitrary code execution.

Upstream issue:

https://sourceware.org/bugzilla/show_bug.cgi?id=22786

Upstream patch:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5460617d1567657621107d895ee2dd83bc1f88f2

Product bug:

https://bugzilla.redhat.com/show_bug.cgi?id=1579742
Comment 1 Andrej Nemec 2018-05-22 08:50:29 EDT 
Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 1581270]
Comment 8 Scott Gayou 2018-05-31 14:18:38 EDT 
Statement:

Red Hat Product Security has rated this issue as having a security impact of Moderate, and a future update may address this flaw.
Comment 9 errata-xmlrpc 2018-10-30 03:36:19 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3092 https://access.redhat.com/errata/RHSA-2018:3092
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