Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Summary
Titlekernel-rt security and bug fix update
Informations
NameRHSA-2017:0387First vendor Publication2017-03-02
VendorRedHatLast vendor Modification2017-03-02
Severity (Vendor) N/ARevision01

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score7.2Attack RangeLocal
Cvss Impact Score10Attack ComplexityLow
Cvss Expoit Score3.9AuthenticationNone Required
Calculate full CVSS 2.0 Vectors scores

Detail

Problem Description:

An update for kernel-rt is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Realtime (v. 7) - noarch, x86_64 Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, x86_64

3. Description:

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

* Linux kernel built with the Kernel-based Virtual Machine (CONFIG_KVM) support is vulnerable to a null pointer dereference flaw. It could occur on x86 platform, when emulating an undefined instruction. An attacker could use this flaw to crash the host kernel resulting in DoS. (CVE-2016-8630, Important)

* A race condition issue leading to a use-after-free flaw was found in the way the raw packet sockets implementation in the Linux kernel networking subsystem handled synchronization while creating the TPACKET_V3 ring buffer. A local user able to open a raw packet socket (requires the CAP_NET_RAW capability) could use this flaw to elevate their privileges on the system. (CVE-2016-8655, Important)

* A flaw was discovered in the Linux kernel's implementation of VFIO. An attacker issuing an ioctl can create a situation where memory is corrupted and modify memory outside of the expected area. This may overwrite kernel memory and subvert kernel execution. (CVE-2016-9083, Important)

* The use of a kzalloc with an integer multiplication allowed an integer overflow condition to be reached in vfio_pci_intrs.c. This combined with CVE-2016-9083 may allow an attacker to craft an attack and use unallocated memory, potentially crashing the machine. (CVE-2016-9084, Moderate)

Red Hat would like to thank Philip Pettersson for reporting CVE-2016-8655.

Bug Fix(es):

* Previously, the asynchronous page fault woke code references spinlocks, which were actually sleeping locks in the RT kernel. Because of this, when the code was executed from the exception context, a bug warning appeared on the console. With this update, the regular wait queue and spinlock code in this area has been modified to use simple-wait-queue and raw-spinlocks. This code change enables the asynchronous page fault code to run in a non-preemptable state without bug warnings. (BZ#1418035)

4. Solution:

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

5. Bugs fixed (https://bugzilla.redhat.com/):

1389258 - CVE-2016-9083 kernel: State machine confusion bug in vfio driver leading to memory corruption 1389259 - CVE-2016-9084 kernel: Integer overflow when using kzalloc in vfio driver 1393350 - CVE-2016-8630 kernel: kvm: x86: NULL pointer dereference during instruction decode 1400019 - CVE-2016-8655 kernel: Race condition in packet_set_ring leads to use after free 1415172 - kernel-rt: update to the RHEL7.3.z batch#3 source tree [rt-7.3.z]

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2017-0387.html

CWE : Common Weakness Enumeration

%idName
29 %CWE-190Integer Overflow or Wraparound (CWE/SANS Top 25)
14 %CWE-476NULL Pointer Dereference
14 %CWE-416Use After Free
14 %CWE-362Race Condition
14 %CWE-284Access Control (Authorization) Issues
14 %CWE-119Failure to Constrain Operations within the Bounds of a Memory Buffer

CPE : Common Platform Enumeration

TypeDescriptionCount
Os2571

Snort® IPS/IDS

DateDescription
2017-01-18Linux net af_packet.c tpacket version race condition use after free attempt
RuleID : 41028 - Revision : 2 - Type : OS-LINUX
2017-01-18Linux net af_packet.c tpacket version race condition use after free attempt
RuleID : 41027 - Revision : 2 - Type : OS-LINUX

Nessus® Vulnerability Scanner

DateDescription
2018-08-17Name : The remote PhotonOS host is missing multiple security updates.
File : PhotonOS_PHSA-2016-0012.nasl - Type : ACT_GATHER_INFO
2018-08-17Name : The remote PhotonOS host is missing multiple security updates.
File : PhotonOS_PHSA-2016-0014.nasl - Type : ACT_GATHER_INFO
2017-11-01Name : The remote EulerOS host is missing multiple security updates.
File : EulerOS_SA-2017-1271.nasl - Type : ACT_GATHER_INFO
2017-09-19Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3422-1.nasl - Type : ACT_GATHER_INFO
2017-08-16Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2017-1842-1.nasl - Type : ACT_GATHER_INFO
2017-07-24Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3361-1.nasl - Type : ACT_GATHER_INFO
2017-07-13Name : The remote Virtuozzo host is missing a security update.
File : Virtuozzo_VZLSA-2017-0386.nasl - Type : ACT_GATHER_INFO
2017-06-07Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3312-1.nasl - Type : ACT_GATHER_INFO
2017-06-07Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3312-2.nasl - Type : ACT_GATHER_INFO
2017-04-03Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2017-0057.nasl - Type : ACT_GATHER_INFO
2017-03-07Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2017-0386.nasl - Type : ACT_GATHER_INFO
2017-03-03Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2017-0386.nasl - Type : ACT_GATHER_INFO
2017-03-03Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2017-0386.nasl - Type : ACT_GATHER_INFO
2017-03-03Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2017-0387.nasl - Type : ACT_GATHER_INFO
2017-03-03Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2017-0402.nasl - Type : ACT_GATHER_INFO
2017-03-03Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20170302_kernel_on_SL7_x.nasl - Type : ACT_GATHER_INFO
2017-02-16Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0471-1.nasl - Type : ACT_GATHER_INFO
2017-02-15Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0464-1.nasl - Type : ACT_GATHER_INFO
2017-02-09Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2017-0039.nasl - Type : ACT_GATHER_INFO
2017-02-08Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2017-3514.nasl - Type : ACT_GATHER_INFO
2017-01-18Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0181-1.nasl - Type : ACT_GATHER_INFO
2017-01-16Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2017-0004.nasl - Type : ACT_GATHER_INFO
2017-01-16Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2017-0005.nasl - Type : ACT_GATHER_INFO
2017-01-13Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2017-3508.nasl - Type : ACT_GATHER_INFO
2017-01-13Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2017-3509.nasl - Type : ACT_GATHER_INFO
2017-01-03Name : The remote Debian host is missing a security update.
File : debian_DLA-772.nasl - Type : ACT_GATHER_INFO
2016-12-27Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-3249-1.nasl - Type : ACT_GATHER_INFO
2016-12-22Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-3247-1.nasl - Type : ACT_GATHER_INFO
2016-12-21Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-3197-1.nasl - Type : ACT_GATHER_INFO
2016-12-21Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3161-1.nasl - Type : ACT_GATHER_INFO
2016-12-21Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3161-2.nasl - Type : ACT_GATHER_INFO
2016-12-21Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3161-3.nasl - Type : ACT_GATHER_INFO
2016-12-21Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3161-4.nasl - Type : ACT_GATHER_INFO
2016-12-21Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3162-1.nasl - Type : ACT_GATHER_INFO
2016-12-21Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3162-2.nasl - Type : ACT_GATHER_INFO
2016-12-14Name : The remote Fedora host is missing a security update.
File : fedora_2016-5aff4a6bbc.nasl - Type : ACT_GATHER_INFO
2016-12-14Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-3109-1.nasl - Type : ACT_GATHER_INFO
2016-12-14Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-3111-1.nasl - Type : ACT_GATHER_INFO
2016-12-14Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-3112-1.nasl - Type : ACT_GATHER_INFO
2016-12-14Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-3113-1.nasl - Type : ACT_GATHER_INFO
2016-12-14Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-3119-1.nasl - Type : ACT_GATHER_INFO
2016-12-13Name : The remote Slackware host is missing a security update.
File : Slackware_SSA_2016-347-01.nasl - Type : ACT_GATHER_INFO
2016-12-13Name : The remote Fedora host is missing a security update.
File : fedora_2016-107f03cc00.nasl - Type : ACT_GATHER_INFO
2016-12-13Name : The remote Fedora host is missing a security update.
File : fedora_2016-5cb5b4082d.nasl - Type : ACT_GATHER_INFO
2016-12-12Name : The remote openSUSE host is missing a security update.
File : openSUSE-2016-1426.nasl - Type : ACT_GATHER_INFO
2016-12-12Name : The remote openSUSE host is missing a security update.
File : openSUSE-2016-1428.nasl - Type : ACT_GATHER_INFO
2016-12-12Name : The remote openSUSE host is missing a security update.
File : openSUSE-2016-1431.nasl - Type : ACT_GATHER_INFO
2016-12-12Name : The remote openSUSE host is missing a security update.
File : openSUSE-2016-1436.nasl - Type : ACT_GATHER_INFO
2016-12-09Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-3063-1.nasl - Type : ACT_GATHER_INFO
2016-12-08Name : The remote Amazon Linux AMI host is missing a security update.
File : ala_ALAS-2016-772.nasl - Type : ACT_GATHER_INFO
2016-12-08Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-3049-1.nasl - Type : ACT_GATHER_INFO
2016-12-07Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-3039-1.nasl - Type : ACT_GATHER_INFO
2016-12-06Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3149-1.nasl - Type : ACT_GATHER_INFO
2016-12-06Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3149-2.nasl - Type : ACT_GATHER_INFO
2016-12-06Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3150-1.nasl - Type : ACT_GATHER_INFO
2016-12-06Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3151-1.nasl - Type : ACT_GATHER_INFO
2016-12-06Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3151-2.nasl - Type : ACT_GATHER_INFO
2016-12-06Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3151-3.nasl - Type : ACT_GATHER_INFO
2016-12-06Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3151-4.nasl - Type : ACT_GATHER_INFO
2016-12-06Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3152-1.nasl - Type : ACT_GATHER_INFO
2016-12-06Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3152-2.nasl - Type : ACT_GATHER_INFO
2016-11-25Name : The remote Fedora host is missing a security update.
File : fedora_2016-ee3a114958.nasl - Type : ACT_GATHER_INFO
2016-11-21Name : The remote Fedora host is missing a security update.
File : fedora_2016-876deae183.nasl - Type : ACT_GATHER_INFO
2016-11-17Name : The remote Fedora host is missing a security update.
File : fedora_2016-14c4187e3a.nasl - Type : ACT_GATHER_INFO
2016-11-08Name : The remote Fedora host is missing a security update.
File : fedora_2016-96d276367e.nasl - Type : ACT_GATHER_INFO

Alert History

If you want to see full details history, please login or register.
0
1
DateInformations
2017-03-04 13:26:24
  • Multiple Updates
2017-03-03 00:22:28
  • First insertion