A security flaw was found in the Linux kernel in the mark_source_chains() function in "net/ipv4/netfilter/ip_tables.c". It is possible for a user-supplied "ipt_entry" structure to have a large "next_offset" field. This field is not bounds checked prior to writing to a counter value at the supplied offset.
Find out more about CVE-2016-3134 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6. This issue is not currently planned to be addressed in future updates, as user namespaces which the flaw affects are not supported in these products. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and MRG-2. Future Linux kernel updates for the respective releases might address this issue.
| Base Score | 6.2 |
|---|---|
| Base Metrics | AV:L/AC:H/Au:N/C:C/I:C/A:C |
| Access Vector | Local |
| Access Complexity | High |
| Authentication | None |
| Confidentiality Impact | Complete |
| Integrity Impact | Complete |
| Availability Impact | Complete |
| CVSS3 Base Score | 6.4 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H |
| Attack Vector | Local |
| Attack Complexity | High |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Changed |
| Confidentiality | None |
| Integrity Impact | Low |
| Availability Impact | High |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 7 (kernel) | RHSA-2016:1847 | 2016-09-15 |
| Red Hat Enterprise Linux for Real Time for NFV (v. 7) (kernel-rt) | RHSA-2016:1875 | 2016-09-15 |
| Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) | RHSA-2016:1883 | 2016-09-14 |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 6 | kernel | Will not fix |
| Red Hat Enterprise Linux 5 | kernel | Will not fix |
Vulmon