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Virtuozzo 7 : kernel / kernel-abi-whitelists / kernel-debug / etc (VZLSA-2017-0386)

high Nessus Plugin ID 101431

Synopsis

The remote Virtuozzo host is missing a security update.

Description

An update for kernel 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.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

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.

Additional Changes :

Space precludes documenting all of the bug fixes and enhancements included in this advisory. To see the complete list of bug fixes and enhancements, refer to the following KnowledgeBase article:
https://access.redhat.com/articles/ 2940041.

Note that Tenable Network Security has attempted to extract the preceding description block directly from the corresponding Red Hat security advisory. Virtuozzo provides no description for VZLSA advisories. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected kernel / kernel-abi-whitelists / kernel-debug / etc package.

See Also

http://www.nessus.org/u?43a5fb2d

https://access.redhat.com/errata/RHSA-2017-0386

Plugin Details

Severity: High

ID: 101431

File Name: Virtuozzo_VZLSA-2017-0386.nasl

Version: 1.7

Type: local

Published: 7/13/2017

Updated: 1/4/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.6

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:virtuozzo:virtuozzo:kernel, p-cpe:/a:virtuozzo:virtuozzo:kernel-abi-whitelists, p-cpe:/a:virtuozzo:virtuozzo:kernel-debug, p-cpe:/a:virtuozzo:virtuozzo:kernel-debug-devel, p-cpe:/a:virtuozzo:virtuozzo:kernel-devel, p-cpe:/a:virtuozzo:virtuozzo:kernel-doc, p-cpe:/a:virtuozzo:virtuozzo:kernel-headers, p-cpe:/a:virtuozzo:virtuozzo:kernel-tools, p-cpe:/a:virtuozzo:virtuozzo:kernel-tools-libs, p-cpe:/a:virtuozzo:virtuozzo:kernel-tools-libs-devel, p-cpe:/a:virtuozzo:virtuozzo:perf, p-cpe:/a:virtuozzo:virtuozzo:python-perf, cpe:/o:virtuozzo:virtuozzo:7

Required KB Items: Host/local_checks_enabled, Host/Virtuozzo/release, Host/Virtuozzo/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/6/2017

Exploitable With

Core Impact

Metasploit (AF_PACKET chocobo_root Privilege Escalation)

Reference Information

CVE: CVE-2016-8630, CVE-2016-8655, CVE-2016-9083, CVE-2016-9084