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
Summary: CVE-2018-11236 glibc: Integer overflow in stdlib/canonicalize.c on 32-bit arc...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-11236
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: 1579742 1581270 1581271 1581881 1581882 1582343 1582344 1849766
Blocks: 1581279
TreeView+ depends on / blocked
 
Reported: 2018-05-22 12:49 UTC by Andrej Nemec
Modified: 2024-03-25 15:04 UTC (History)
20 users (show)

Fixed In Version: glibc 2.28
Clone Of:
Environment:
Last Closed: 2019-06-10 10:26:11 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:3092 0 None None None 2018-10-30 07:36:29 UTC
Sourceware 22786 0 P2 RESOLVED Stack buffer overflow in realpath() if input size is close to SSIZE_MAX (CVE-2018-11236) 2021-02-05 11:08:48 UTC

Description Andrej Nemec 2018-05-22 12:49:42 UTC 
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 12:50:29 UTC 
Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 1581270]
Comment 9 errata-xmlrpc 2018-10-30 07:36:19 UTC 
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
Comment 10 Marian Rehak 2019-06-14 10:17:56 UTC 
Statement:

Red Hat Product Security has rated this issue as having moderate security impact and a future update may address this flaw.
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