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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.
+++ 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
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