CVE-2016-3672
Description
The arch_pick_mmap_layout function in arch/x86/mm/mmap.c in the Linux kernel through 4.5.2 does not properly randomize the legacy base address, which makes it easier for local users to defeat the intended restrictions on the ADDR_NO_RANDOMIZE flag, and bypass the ASLR protection mechanism for a setuid or setgid program, by disabling stack-consumption resource limits.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
Linux Kernel (x86) - Disable ASLR by Setting the RLIMIT_STACK Resource to Unlimited
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 4.5.1-1 |
| debian | bullseye | fixed | 4.5.1-1 |
| debian | forky | fixed | 4.5.1-1 |
| debian | sid | fixed | 4.5.1-1 |
| debian | trixie | fixed | 4.5.1-1 |
| suse | 12.0 | affected | |
| ubuntu | 12.04 | affected | |
| ubuntu | 14.04 | affected | |
| ubuntu | 15.10 | affected | |
| linux-kernel | affected | |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| novell | suse_linux_enterprise_software_development_kit | 12.0 | |
References
- https://www.suse.com/security/cve/CVE-2016-3672.html
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8b8addf891de8a00e4d39fc32f93f7c5eb8feceb
- http://hmarco.org/bugs/CVE-2016-3672-Unlimiting-the-stack-not-longer-dis
- http://hmarco.org/bugs/CVE-2016-3672-Unlimiting-the-stack-not-longer-disables-ASLR.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182524.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00044.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00055.html
- http://seclists.org/fulldisclosure/2016/Apr/26
- http://www.debian.org/security/2016/dsa-3607
- http://www.securityfocus.com/archive/1/537996/100/0/threaded
- http://www.securityfocus.com/bid/85884
- http://www.securitytracker.com/id/1035506
- http://www.ubuntu.com/usn/USN-2989-1
- http://www.ubuntu.com/usn/USN-2996-1
- http://www.ubuntu.com/usn/USN-2997-1
- http://www.ubuntu.com/usn/USN-2998-1
- http://www.ubuntu.com/usn/USN-3000-1
- http://www.ubuntu.com/usn/USN-3001-1
- http://www.ubuntu.com/usn/USN-3002-1
- http://www.ubuntu.com/usn/USN-3003-1
- http://www.ubuntu.com/usn/USN-3004-1
- https://access.redhat.com/errata/RHSA-2018:0676
CWEs
CWE-254
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.