Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-4211-1)

critical Nessus Plugin ID 131565

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-4211-1 advisory.

- In the Linux kernel before 4.20.2, kernel/sched/fair.c mishandles leaf cfs_rq's, which allows attackers to cause a denial of service (infinite loop in update_blocked_averages) or possibly have unspecified other impact by inducing a high load. (CVE-2018-20784)

- An issue was discovered in write_tpt_entry in drivers/infiniband/hw/cxgb4/mem.c in the Linux kernel through 5.3.2. The cxgb4 driver is directly calling dma_map_single (a DMA function) from a stack variable.
This could allow an attacker to trigger a Denial of Service, exploitable if this driver is used on an architecture for which this stack/DMA interaction has security relevance. (CVE-2019-17075)

- In the Linux kernel through 5.3.2, cfg80211_mgd_wext_giwessid in net/wireless/wext-sme.c does not reject a long SSID IE, leading to a Buffer Overflow. (CVE-2019-17133)

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-4211-1

Plugin Details

Severity: Critical

ID: 131565

File Name: ubuntu_USN-4211-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 12/3/2019

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: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2019-17133

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1063-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1099-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1126-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1130-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-170-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-170-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-170-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-170-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-170-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-170-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-170-powerpc64-smp, cpe:/o:canonical:ubuntu_linux:16.04:-: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: 12/3/2019

Vulnerability Publication Date: 2/22/2019

Reference Information

CVE: CVE-2018-20784, CVE-2019-17075, CVE-2019-17133

USN: 4211-1