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Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-3676-1)

medium Nessus Plugin ID 110476

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Synopsis

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

Description

The remote Ubuntu 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3676-1 advisory.

 - The ext4_iget function in fs/ext4/inode.c in the Linux kernel through 4.15.15 mishandles the case of a root directory with a zero i_links_count, which allows attackers to cause a denial of service (ext4_process_freed_data NULL pointer dereference and OOPS) via a crafted ext4 image. (CVE-2018-1092)

 - The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image because balloc.c and ialloc.c do not validate bitmap block numbers. (CVE-2018-1093)

 - The cdrom_ioctl_media_changed function in drivers/cdrom/cdrom.c in the Linux kernel before 4.16.6 allows local attackers to use a incorrect bounds check in the CDROM driver CDROM_MEDIA_CHANGED ioctl to read out kernel memory. (CVE-2018-10940)

 - Memory leak in the hwsim_new_radio_nl function in drivers/net/wireless/mac80211_hwsim.c in the Linux kernel through 4.15.9 allows local users to cause a denial of service (memory consumption) by triggering an out-of-array error case. (CVE-2018-8087)

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-3676-1

Plugin Details

Severity: Medium

ID: 110476

File Name: ubuntu_USN-3676-1.nasl

Version: 1.10

Type: local

Agent: unix

Published: 6/12/2018

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: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

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

CVSS Score Source: CVE-2018-1093

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

CVSS Score Source: CVE-2018-8087

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1027-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1061-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1091-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1094-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-128-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-128-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-128-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-128-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-128-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-128-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-128-powerpc64-smp, cpe:/o:canonical:ubuntu_linux:16.04:-: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: 6/11/2018

Vulnerability Publication Date: 3/13/2018

Reference Information

CVE: CVE-2018-1092, CVE-2018-1093, CVE-2018-10940, CVE-2018-8087

USN: 3676-1