Red Hat Bugzilla – Bug 730379
libresolv is not compiled with the stack protector enabled
Last modified: 2016-11-24 10:59:12 EST
Description of problem:
The libresolv library is not compiled with the stack protector enabled. Because it talks to remote DNS servers to do lookups, it might be subjected to malformed replies. Although there are no known bugs in this library that are exploitable, it is prudent to make sure we have used protection mechanisms built into the compiler "just in case". Because of network delays and server response times, any overhead created by the stack protector is likely to be unnoticed.
Steps to Reproduce:
1. checksec.sh --file /lib64/libresolv-2.12.so
Partial RELRO No canary found NX enabled Dynamic Shared Object
Partial RELRO Canary found NX enabled Dynamic Shared Object
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.