CVE-2019-11191
Published: April 12, 2019Last modified: May 14, 2024
Description
The Linux kernel through 5.0.7, when CONFIG_IA32_AOUT is enabled and ia32_aout is loaded, allows local users to bypass ASLR on setuid a.out programs (if any exist) because install_exec_creds() is called too late in load_aout_binary() in fs/binfmt_aout.c, and thus the ptrace_may_access() check has a race condition when reading /proc/pid/stat. NOTE: the software maintainer disputes that this is a vulnerability because ASLR for a.out format executables has never been supported
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 2.5 |
| Attack Vector | LOCAL |
| Attack complexity | HIGH |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | LOW |
| Integrity impact | NONE |
| Availability impact | NONE |
| Vector | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | Stream | linux-lts | Not affected (6.1.33-r0) |
References
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html
- http://www.openwall.com/lists/oss-security/2019/04/18/5
- http://www.openwall.com/lists/oss-security/2019/05/22/7
- http://www.securityfocus.com/bid/107887
- https://usn.ubuntu.com/4006-1/
- https://usn.ubuntu.com/4006-2/
- https://usn.ubuntu.com/4007-1/
- https://usn.ubuntu.com/4007-2/
- https://usn.ubuntu.com/4008-1/
- https://usn.ubuntu.com/4008-3/
- https://www.openwall.com/lists/oss-security/2019/04/03/4
- https://www.openwall.com/lists/oss-security/2019/04/03/4/1