Ubuntu 14.04 LTS : Linux kernel (Vivid HWE) vulnerabilities (USN-2949-1)

critical Nessus Plugin ID 90406

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-2949-1 advisory.

- drivers/infiniband/hw/cxgb3/iwch_cm.c in the Linux kernel before 4.5 does not properly identify error conditions, which allows remote attackers to execute arbitrary code or cause a denial of service (use- after-free) via crafted packets. (CVE-2015-8812)

- The evm_verify_hmac function in security/integrity/evm/evm_main.c in the Linux kernel before 4.5 does not properly copy data, which makes it easier for local users to forge MAC values via a timing side-channel attack. (CVE-2016-2085)

- The Linux kernel before 4.5 allows local users to bypass file-descriptor limits and cause a denial of service (memory consumption) by leveraging incorrect tracking of descriptor ownership and sending each descriptor over a UNIX socket before closing it. NOTE: this vulnerability exists because of an incorrect fix for CVE-2013-4312. (CVE-2016-2550)

- fs/pipe.c in the Linux kernel before 4.5 does not limit the amount of unread data in pipes, which allows local users to cause a denial of service (memory consumption) by creating many pipes with non-default sizes. (CVE-2016-2847)

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-2949-1

Plugin Details

Severity: Critical

ID: 90406

File Name: ubuntu_USN-2949-1.nasl

Version: 2.14

Type: local

Agent: unix

Published: 4/7/2016

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: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2015-8812

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19.0-58-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19.0-58-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19.0-58-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19.0-58-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19.0-58-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19.0-58-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19.0-58-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 Ease: No known exploits are available

Patch Publication Date: 4/6/2016

Vulnerability Publication Date: 4/27/2016

Reference Information

CVE: CVE-2015-8812, CVE-2016-2085, CVE-2016-2550, CVE-2016-2847

USN: 2949-1