The ExecShield feature in a certain Red Hat patch for the Linux kernel in Red Hat Enterprise Linux (RHEL) 5 and 6 and Fedora 15 and 16 does not properly handle use of many shared libraries by a 32-bit executable file, which makes it easier for context-dependent attackers to bypass the ASLR protection mechanism by leveraging a predictable base address for one of these libraries.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Fedora | Fedoraproject | 15 (including) | 15 (including) |
| Fedora | Fedoraproject | 16 (including) | 16 (including) |
| Enterprise_linux | Redhat | 5 (including) | 5 (including) |
| Enterprise_linux | Redhat | 6.0 (including) | 6.0 (including) |
| Red Hat Enterprise Linux 5 | RedHat | kernel-0:2.6.18-348.1.1.el5 | * |
| Red Hat Enterprise Linux 6 | RedHat | kernel-0:2.6.32-279.14.1.el6 | * |
| Linux-ec2 | Ubuntu | maverick | * |
| Linux-mvl-dove | Ubuntu | lucid | * |
References
- http://openwall.com/lists/oss-security/2012/03/21/3
- http://scarybeastsecurity.blogspot.com/2012/03/some-random-observations-on-linux-aslr.html
- http://www.openwall.com/lists/oss-security/2012/03/20/4
- https://bugzilla.redhat.com/show_bug.cgi?id=804947
- https://oss.oracle.com/git/?p=redpatch.git%3Ba=commit%3Bh=302a4fc15aebf202b6dffd6c804377c6058ee6e4
- http://openwall.com/lists/oss-security/2012/03/21/3
- http://scarybeastsecurity.blogspot.com/2012/03/some-random-observations-on-linux-aslr.html
- http://www.openwall.com/lists/oss-security/2012/03/20/4
- https://bugzilla.redhat.com/show_bug.cgi?id=804947
- https://oss.oracle.com/git/?p=redpatch.git%3Ba=commit%3Bh=302a4fc15aebf202b6dffd6c804377c6058ee6e4