CVE-2016-4997
Description
The compat IPT_SO_SET_REPLACE and IP6T_SO_SET_REPLACE setsockopt implementations in the netfilter subsystem in the Linux kernel before 4.6.3 allow local users to gain privileges or cause a denial of service (memory corruption) by leveraging in-container root access to provide a crafted offset value that triggers an unintended decrement.
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 4.6.2 (Ubuntu 16.04.1) - 'IP6T_SO_SET_REPLACE' Local Privilege Escalation
Linux Kernel 4.6.3 (x86) - 'Netfilter' Local Privilege Escalation (Metasploit)
Metasploit modules
OS impact
Linux kernel Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | 3.2.80 |
SUSE Affected 2 releases
| Version | Status | Fixed in |
|---|---|---|
| 12.0 | Affected | — |
| — | Affected | — |
Ubuntu Affected 4 releases
| Version | Status | Fixed in |
|---|---|---|
| 16.04 | Affected | — |
| 15.10 | Affected | — |
| 14.04 | Affected | — |
| 12.04 | Affected | — |
Debian Mixed 6 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 4.6.2-2 |
| sid | Fixed | 4.6.2-2 |
| forky | Fixed | 4.6.2-2 |
| bullseye | Fixed | 4.6.2-2 |
| bookworm | Fixed | 4.6.2-2 |
| 8.0 | Affected | — |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| novell | suse_linux_enterprise_software_development_kit | 12.0 | |
References
- https://www.suse.com/security/cve/CVE-2016-4997.html
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ce683e5f9d045e5d67d1312a42b359cb2ab2a13c
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00060.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00061.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00027.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00044.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00048.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00050.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00051.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00052.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00053.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00054.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00055.html
- http://rhn.redhat.com/errata/RHSA-2016-1847.html
- http://rhn.redhat.com/errata/RHSA-2016-1875.html
- http://rhn.redhat.com/errata/RHSA-2016-1883.html
- http://www.debian.org/security/2016/dsa-3607
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.3
- http://www.openwall.com/lists/oss-security/2016/06/24/5
- http://www.openwall.com/lists/oss-security/2016/09/29/10
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
- http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
CWEs
CWE-264
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.