6.9 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:C/I:C/A:C
The kernel-rt packages contain the Linux kernel, the core of any Linux operating system. * A flaw was found in the way the Linux kernel’s futex subsystem handled the requeuing of certain Priority Inheritance (PI) futexes. A local, unprivileged user could use this flaw to escalate their privileges on the system. (CVE-2014-3153, Important) * 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. (CVE-2014-4699, Important) Note: The CVE-2014-4699 issue only affected systems using an Intel CPU. * It was found that the permission checks performed by the Linux kernel when a netlink message was received were not sufficient. A local, unprivileged user could potentially bypass these restrictions by passing a netlink socket as stdout or stderr to a more privileged process and altering the output of this process. (CVE-2014-0181, Moderate) * It was found that the aio_read_events_ring() function of the Linux kernel’s Asynchronous I/O (AIO) subsystem did not properly sanitize the AIO ring head received from user space. A local, unprivileged user could use this flaw to disclose random parts of the (physical) memory belonging to the kernel and/or other processes. (CVE-2014-0206, Moderate) * An out-of-bounds memory access flaw was found in the Netlink Attribute extension of the Berkeley Packet Filter (BPF) interpreter functionality in the Linux kernel’s networking implementation. A local, unprivileged user could use this flaw to crash the system or leak kernel memory to user space via a specially crafted socket filter. (CVE-2014-3144, CVE-2014-3145, Moderate) * An out-of-bounds memory access flaw was found in the Linux kernel’s system call auditing implementation. On a system with existing audit rules defined, a local, unprivileged user could use this flaw to leak kernel memory to user space or, potentially, crash the system. (CVE-2014-3917, Moderate) * A flaw was found in the way Linux kernel’s Transparent Huge Pages (THP) implementation handled non-huge page migration. A local, unprivileged user could use this flaw to crash the kernel by migrating transparent hugepages. (CVE-2014-3940, Moderate) * An integer underflow flaw was found in the way the Linux kernel’s Stream Control Transmission Protocol (SCTP) implementation processed certain COOKIE_ECHO packets. By sending a specially crafted SCTP packet, a remote attacker could use this flaw to prevent legitimate connections to a particular SCTP server socket to be made. (CVE-2014-4667, Moderate) * An information leak flaw was found in the RAM Disks Memory Copy (rd_mcp) backend driver of the iSCSI Target subsystem of the Linux kernel. A privileged user could use this flaw to leak the contents of kernel memory to an iSCSI initiator remote client. (CVE-2014-4027, Low) Red Hat would like to thank Kees Cook of Google for reporting CVE-2014-3153, Andy Lutomirski for reporting CVE-2014-4699 and CVE-2014-0181, and Gopal Reddy Kodudula of Nokia Siemens Networks for reporting CVE-2014-4667. Google acknowledges Pinkie Pie as the original reporter of CVE-2014-3153. The CVE-2014-0206 issue was discovered by Mateusz Guzik of Red Hat. Users are advised to upgrade to these updated packages, which upgrade the kernel-rt kernel to version kernel-rt-3.10.33-rt32.43 and correct these issues. The system must be rebooted for this update to take effect.
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b9cd18de4db3c9ffa7e17b0dc0ca99ed5aa4d43a
linux.oracle.com/errata/ELSA-2014-0924.html
linux.oracle.com/errata/ELSA-2014-3047.html
linux.oracle.com/errata/ELSA-2014-3048.html
openwall.com/lists/oss-security/2014/07/05/4
openwall.com/lists/oss-security/2014/07/08/16
openwall.com/lists/oss-security/2014/07/08/5
packetstormsecurity.com/files/127573/Linux-Kernel-ptrace-sysret-Local-Privilege-Escalation.html
secunia.com/advisories/59633
secunia.com/advisories/59639
secunia.com/advisories/59654
secunia.com/advisories/60220
secunia.com/advisories/60380
secunia.com/advisories/60393
www.debian.org/security/2014/dsa-2972
www.exploit-db.com/exploits/34134
www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.4
www.openwall.com/lists/oss-security/2014/07/04/4
www.osvdb.org/108754
www.ubuntu.com/usn/USN-2266-1
www.ubuntu.com/usn/USN-2267-1
www.ubuntu.com/usn/USN-2268-1
www.ubuntu.com/usn/USN-2269-1
www.ubuntu.com/usn/USN-2270-1
www.ubuntu.com/usn/USN-2271-1
www.ubuntu.com/usn/USN-2272-1
www.ubuntu.com/usn/USN-2273-1
www.ubuntu.com/usn/USN-2274-1
access.redhat.com/security/updates/classification/#important
bugzilla.redhat.com/show_bug.cgi?id=1115927
github.com/torvalds/linux/commit/b9cd18de4db3c9ffa7e17b0dc0ca99ed5aa4d43a
rhn.redhat.com/errata/RHSA-2014-0913.html
www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.10.47
www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.14.11
www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.97