Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-3910-1)

medium Nessus Plugin ID 122892

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-3910-1 advisory.

- fs/f2fs/segment.c in the Linux kernel before 4.13 allows local users to cause a denial of service (NULL pointer dereference and panic) by using a noflush_merge option that triggers a NULL value for a flush_cmd_control data structure. (CVE-2017-18241)

- A flaw was found affecting the Linux kernel before version 4.17. By mmap()ing a FUSE-backed file onto a process's memory containing command line arguments (or environment strings), an attacker can cause utilities from psutils or procps (such as ps, w) or any other program which makes a read() call to the /proc/<pid>/cmdline (or /proc/<pid>/environ) files to block indefinitely (denial of service) or for some controlled time (as a synchronization primitive for other attacks). (CVE-2018-1120)

- The function hso_get_config_data in drivers/net/usb/hso.c in the Linux kernel through 4.19.8 reads if_num from the USB device (as a u8) and uses it to index a small array, resulting in an object out-of-bounds (OOB) read that potentially allows arbitrary read in the kernel address space. (CVE-2018-19985)

- The resv_map_release function in mm/hugetlb.c in the Linux kernel through 4.15.7 allows local users to cause a denial of service (BUG) via a crafted application that makes mmap system calls and has a large pgoff argument to the remap_file_pages system call. (CVE-2018-7740)

- In PolicyKit (aka polkit) 0.115, the start time protection mechanism can be bypassed because fork() is not atomic, and therefore authorization decisions are improperly cached. This is related to lack of uid checking in polkitbackend/polkitbackendinteractiveauthority.c. (CVE-2019-6133)

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-3910-1

Plugin Details

Severity: Medium

ID: 122892

File Name: ubuntu_USN-3910-1.nasl

Version: 1.10

Type: local

Agent: unix

Published: 3/18/2019

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: Medium

Base Score: 4.4

Temporal Score: 3.4

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

CVSS Score Source: CVE-2019-6133

CVSS v3

Risk Factor: Medium

Base Score: 6.7

Temporal Score: 6

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1041-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1077-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1104-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1108-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-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 Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/15/2019

Vulnerability Publication Date: 3/7/2018

Reference Information

CVE: CVE-2017-18241, CVE-2018-1120, CVE-2018-19985, CVE-2018-7740, CVE-2019-6133

USN: 3910-1