Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4578-1)

high Nessus Plugin ID 141448
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

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

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4578-1 advisory.

- The xfs_dinode_verify function in fs/xfs/libxfs/xfs_inode_buf.c in the Linux kernel through 4.16.3 allows local users to cause a denial of service (xfs_ilock_attr_map_shared invalid pointer dereference) via a crafted xfs image. (CVE-2018-10322)

- In the Linux kernel 5.0.21 and 5.3.11, mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in try_merge_free_space in fs/btrfs/free-space-cache.c because the pointer to a left data structure can be the same as the pointer to a right data structure. (CVE-2019-19448)

- A memory out-of-bounds read flaw was found in the Linux kernel before 5.9-rc2 with the ext3/ext4 file system, in the way it accesses a directory with broken indexing. This flaw allows a local user to crash the system if the directory exists. The highest threat from this vulnerability is to system availability.
(CVE-2020-14314)

- A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452. (CVE-2020-25212)

- A missing CAP_NET_RAW check in NFC socket creation in net/nfc/rawsock.c in the Linux kernel before 5.8.2 could be used by local attackers to create raw sockets, bypassing security mechanisms, aka CID-26896f01467a. (CVE-2020-26088)

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

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-4578-1

Plugin Details

Severity: High

ID: 141448

File Name: ubuntu_USN-4578-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 10/14/2020

Updated: 11/24/2020

Dependencies: ssh_get_info.nasl, linux_alt_patch_detect.nasl

Risk Information

CVSS Score Source: CVE-2019-19448

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1056-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1057-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1072-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1073-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1077-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1085-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1086-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1086-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1089-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1098-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1099-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1099-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-120-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-120-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-120-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-121-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-121-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-121-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-aws-hwe, p-cpe:/a:canonical:ubuntu_linux:linux-image-aws-lts-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-azure-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-azure-lts-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-gcp-lts-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-16.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-16.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-16.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-16.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-gke-4.15, p-cpe:/a:canonical:ubuntu_linux:linux-image-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-16.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-16.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-oracle-lts-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-16.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-16.04-edge

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/14/2020

Vulnerability Publication Date: 4/24/2018

Reference Information

CVE: CVE-2018-10322, CVE-2019-19448, CVE-2020-14314, CVE-2020-16119, CVE-2020-16120, CVE-2020-25212, CVE-2020-26088

BID: 103960

USN: 4578-1