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Bug 1260158 - Specially crafted binary can cause readelf to read from an arbitrary address-
Summary: Specially crafted binary can cause readelf to read from an arbitrary address-
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: binutils
Version: 7.2
Hardware: All
OS: All
unspecified
low
Target Milestone: rc
: ---
Assignee: Nick Clifton
QA Contact: Miloš Prchlík
URL:
Whiteboard:
Depends On: 1260034 1260035 1409817
Blocks: 1297579 1313485
TreeView+ depends on / blocked
 
Reported: 2015-09-04 15:18 UTC by Jeff Law
Modified: 2017-01-03 14:16 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Cause: There was code in the readelf program would assume that the binary being examined was well behaved, and followed the ELF specification correctly. Consequence: Using a specially crafted binary image, that did not quite conform to the ELF specification would allow an attacker to force the readelf program to attempt to read from an attacker specified address. Fix: Add code to readelf to verify conformation to the ELF standard before attempting to read the required data. Result: Readelf can no longer be tricked into reading from an arbitrary address.
Clone Of: 1260035
Environment:
Last Closed: 2016-11-04 01:53:03 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
Patch to harden readelf against this type of corrupt binary (1.03 KB, patch)
2016-02-09 14:46 UTC, Nick Clifton 		no flags Details | Diff
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2016:2265 0 normal SHIPPED_LIVE binutils bug fix update 2016-11-03 13:33:42 UTC
Sourceware 18879 0 None None None Never

Description Jeff Law 2015-09-04 15:18:16 UTC 
+++ This bug was initially created as a clone of Bug #1260035 +++

+++ This bug was initially created as a clone of Bug #1260034 +++

[ Creating a clone for RHEL 7 as well. ]

Description of problem:

  Readelf can be fooled into attempting to read from an arbitrary memory location if it is run against a specially crafted binary.

Version-Release number of selected component (if applicable):

  All versions.

How reproducible:

  Run "readelf -a test00-min'

Actual results:

  seg-fault

Expected results:

  error message

Additional info:

  The bug has been fixed in the upstream FSF sources.  The patch can be found here:
 https://sourceware.org/bugzilla/show_bug.cgi?id=18879
Comment 1 Nick Clifton 2016-02-09 14:46:59 UTC 
Created attachment 1122435 [details]
Patch to harden readelf against this type of corrupt binary

This is the patch needed to fix this problem.
Comment 2 Nick Clifton 2016-02-15 17:25:57 UTC 
Patch checked in.  Moved to MODIFIED
Comment 4 Miloš Prchlík 2016-06-24 07:44:37 UTC 
Verified for build binutils-2.25.1-19.base.el7.
Comment 8 errata-xmlrpc 2016-11-04 01:53:03 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2265.html
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