CVE-2014-4699
It was found that the Linux kernel's ptrace subsystem allowed a traced process' instruction pointer to be set to a non-canonical memory address without forcing the non-sysret code path when returning to user space. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system.
Note: The CVE-2014-4699 issue only affected systems using an Intel CPU.
Find out more about CVE-2014-4699 from the MITRE CVE dictionary dictionary and NIST NVD.
Statement
This issue does not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5.
CVSS v2 metrics
| Base Score | 6.9 |
|---|---|
| Base Metrics | AV:L/AC:M/Au:N/C:C/I:C/A:C |
| Access Vector | Local |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | Complete |
| Integrity Impact | Complete |
| Availability Impact | Complete |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
Red Hat Security Errata
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux Advanced Update Support 6.2 (kernel) | RHSA-2014:0949 | 2014-07-28 |
| Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) | RHSA-2014:0913 | 2014-07-22 |
| Red Hat Enterprise Linux Extended Update Support 6.4 (kernel) | RHSA-2014:0925 | 2014-07-23 |
| Red Hat Enterprise Linux 7 (kernel) | RHSA-2014:0923 | 2014-07-23 |
| Red Hat Enterprise Linux 6 (kernel) | RHSA-2014:0924 | 2014-07-23 |
Affected Packages State
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise MRG 2 | realtime-kernel | Affected |
| Red Hat Enterprise Linux 5 | kernel | Not affected |