Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-3582-2)

high Nessus Plugin ID 106973

Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3582-2 advisory.

- The mbcache feature in the ext2 and ext4 filesystem implementations in the Linux kernel before 4.6 mishandles xattr block caching, which allows local users to cause a denial of service (soft lockup) via filesystem operations in environments that use many attributes, as demonstrated by Ceph and Samba.
(CVE-2015-8952)

- The bio_map_user_iov and bio_unmap_user functions in block/bio.c in the Linux kernel before 4.13.8 do unbalanced refcounting when a SCSI I/O vector has small consecutive buffers belonging to the same page.
The bio_add_pc_page function merges them into one, but the page reference is never dropped. This causes a memory leak and possible system lockup (exploitable against the host OS by a guest OS user, if a SCSI disk is passed through to a virtual machine) due to an out-of-memory condition. (CVE-2017-12190)

- The sctp_do_peeloff function in net/sctp/socket.c in the Linux kernel before 4.14 does not check whether the intended netns is used in a peel-off action, which allows local users to cause a denial of service (use-after-free and system crash) or possibly have unspecified other impact via crafted system calls.
(CVE-2017-15115)

- The raw_sendmsg() function in net/ipv4/raw.c in the Linux kernel through 4.14.6 has a race condition in inet->hdrincl that leads to uninitialized stack pointer usage; this allows a local user to execute code and gain privileges. (CVE-2017-17712)

- Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis.
(CVE-2017-5715)

- The dccp_disconnect function in net/dccp/proto.c in the Linux kernel through 4.14.3 allows local users to gain privileges or cause a denial of service (use-after-free) via an AF_UNSPEC connect system call during the DCCP_LISTEN state. (CVE-2017-8824)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected kernel package.

See Also

https://ubuntu.com/security/notices/USN-3582-2

Plugin Details

Severity: High

ID: 106973

File Name: ubuntu_USN-3582-2.nasl

Version: 3.14

Type: local

Agent: unix

Published: 2/23/2018

Updated: 1/9/2024

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.6

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 Score Source: CVE-2017-8824

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:canonical:ubuntu_linux:linux-image-4.4.0-1014-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-116-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-116-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-116-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-116-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-116-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-116-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-116-powerpc64-smp, cpe:/o:canonical:ubuntu_linux:14.04:-:lts

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/22/2018

Vulnerability Publication Date: 10/16/2016

Reference Information

CVE: CVE-2015-8952, CVE-2017-12190, CVE-2017-15115, CVE-2017-17712, CVE-2017-5715, CVE-2017-8824

IAVA: 2018-A-0020

USN: 3582-2