Ubuntu 14.04 LTS : Linux kernel vulnerabilities (USN-2563-1)

high Nessus Plugin ID 82662

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-2563-1 advisory.

- Use-after-free vulnerability in the sctp_assoc_update function in net/sctp/associola.c in the Linux kernel before 3.18.8 allows remote attackers to cause a denial of service (slab corruption and panic) or possibly have unspecified other impact by triggering an INIT collision that leads to improper handling of shared- key data. (CVE-2015-1421)

- The IPv4 implementation in the Linux kernel before 3.18.8 does not properly consider the length of the Read-Copy Update (RCU) grace period for redirecting lookups in the absence of caching, which allows remote attackers to cause a denial of service (memory consumption or system crash) via a flood of packets.
(CVE-2015-1465)

- The stack randomization feature in the Linux kernel before 3.19.1 on 64-bit platforms uses incorrect data types for the results of bitwise left-shift operations, which makes it easier for attackers to bypass the ASLR protection mechanism by predicting the address of the top of the stack, related to the randomize_stack_top function in fs/binfmt_elf.c and the stack_maxrandom_size function in arch/x86/mm/mmap.c. (CVE-2015-1593)

- net/llc/sysctl_net_llc.c in the Linux kernel before 3.19 uses an incorrect data type in a sysctl table, which allows local users to obtain potentially sensitive information from kernel memory or possibly have unspecified other impact by accessing a sysctl entry. (CVE-2015-2041)

- net/rds/sysctl.c in the Linux kernel before 3.19 uses an incorrect data type in a sysctl table, which allows local users to obtain potentially sensitive information from kernel memory or possibly have unspecified other impact by accessing a sysctl entry. (CVE-2015-2042)

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-2563-1

Plugin Details

Severity: High

ID: 82662

File Name: ubuntu_USN-2563-1.nasl

Version: 1.15

Type: local

Agent: unix

Published: 4/9/2015

Updated: 1/9/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2015-1421

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

CVSS Score Source: CVE-2015-1465

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-49-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-49-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-49-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-49-powerpc-e500, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-49-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-49-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-49-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-49-powerpc64-smp, cpe:/o:canonical:ubuntu_linux:14.04:-:lts

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/8/2015

Vulnerability Publication Date: 3/16/2015

Reference Information

CVE: CVE-2015-1421, CVE-2015-1465, CVE-2015-1593, CVE-2015-2041, CVE-2015-2042

BID: 72356, 72435

USN: 2563-1