Detections
Analytics

Ubuntu 20.04 LTS : Xen vulnerabilities (USN-5617-1)

high Nessus Plugin ID 165248

Language:

Synopsis

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

Description

The remote Ubuntu 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5617-1 advisory.

 It was discovered that memory contents previously stored in microarchitectural special registers after RDRAND, RDSEED, and SGX EGETKEY read operations on Intel client and Xeon E3 processors may be briefly exposed to processes on the same or different processor cores. A local attacker could use this to expose sensitive information. (CVE-2020-0543)

 Julien Grall discovered that Xen incorrectly handled memory barriers on ARM-based systems. An attacker could possibly use this issue to cause a denial of service, obtain sensitive information or escalate privileges. (CVE-2020-11739)

 Ilja Van Sprundel discovered that Xen incorrectly handled profiling of guests. An unprivileged attacker could use this issue to obtain sensitive information from other guests, cause a denial of service or possibly gain privileges. (CVE-2020-11740, CVE-2020-11741)

 It was discovered that Xen incorrectly handled grant tables. A malicious guest could possibly use this issue to cause a denial of service. (CVE-2020-11742, CVE-2020-11743)

 Jan Beulich discovered that Xen incorrectly handled certain code paths. An attacker could possibly use this issue to cause a denial of service. (CVE-2020-15563)

 Julien Grall discovered that Xen incorrectly verified memory addresses provided by the guest on ARM-based systems. A malicious guest administrator could possibly use this issue to cause a denial of service.
 (CVE-2020-15564)

 Roger Pau Monn discovered that Xen incorrectly handled caching on x86 Intel systems. An attacker could possibly use this issue to cause a denial of service. (CVE-2020-15565)

 It was discovered that Xen incorrectly handled error in event-channel port allocation. A malicious guest could possibly use this issue to cause a denial of service. (CVE-2020-15566)

 Jan Beulich discovered that Xen incorrectly handled certain EPT (Extended Page Tables).

 An attacker could possibly use this issue to cause a denial of service, data corruption or privilege escalation. (CVE-2020-15567)

 Andrew Cooper discovered that Xen incorrectly handled PCI passthrough. An attacker could possibly use this issue to cause a denial of service. (CVE-2020-25595)

 Andrew Cooper discovered that Xen incorrectly sanitized path injections. An attacker could possibly use this issue to cause a denial of service. (CVE-2020-25596)

 Jan Beulich discovered that Xen incorrectly handled validation of event channels. An attacker could possibly use this issue to cause a denial of service. (CVE-2020-25597)

 Julien Grall and Jan Beulich discovered that Xen incorrectly handled resetting event channels. An attacker could possibly use this issue to cause a denial of service or obtain sensitive information.
 (CVE-2020-25599)

 Julien Grall discovered that Xen incorrectly handled event channels memory allocation on 32-bits domains.
 An attacker could possibly use this issue to cause a denial of service. (CVE-2020-25600)

 Jan Beulich discovered that Xen incorrectly handled resetting or cleaning up event channels. An attacker could possibly use this issue to cause a denial of service. (CVE-2020-25601)

 Andrew Cooper discovered that Xen incorrectly handled certain Intel specific MSR (Model Specific Registers). An attacker could possibly use this issue to cause a denial of service. (CVE-2020-25602)

 Julien Grall discovered that Xen incorrectly handled accessing/allocating event channels. An attacker could possibly use this issue to cause a denial of service, obtain sensitive information of privilege escalation. (CVE-2020-25603)

 Igor Druzhinin discovered that Xen incorrectly handled locks. An attacker could possibly use this issue to cause a denial of service. (CVE-2020-25604)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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 packages.

See Also

https://ubuntu.com/security/notices/USN-5617-1

Plugin Details

Severity: High

ID: 165248

File Name: ubuntu_USN-5617-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 9/19/2022

Updated: 8/28/2024

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

Risk Information

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.4

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

CVSS Score Source: CVE-2020-11741

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.9

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

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

CVSS Score Source: CVE-2020-15565

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:xen-utils-common, p-cpe:/a:canonical:ubuntu_linux:xen-hypervisor-4.11-amd64, p-cpe:/a:canonical:ubuntu_linux:xen-system-amd64, p-cpe:/a:canonical:ubuntu_linux:xen-hypervisor-4.11-arm64, p-cpe:/a:canonical:ubuntu_linux:xen-hypervisor-4.9-amd64, p-cpe:/a:canonical:ubuntu_linux:libxen-dev, p-cpe:/a:canonical:ubuntu_linux:libxengnttab1, p-cpe:/a:canonical:ubuntu_linux:xen-system-arm64, p-cpe:/a:canonical:ubuntu_linux:libxenforeignmemory1, p-cpe:/a:canonical:ubuntu_linux:xenstore-utils, p-cpe:/a:canonical:ubuntu_linux:xen-utils-4.11, p-cpe:/a:canonical:ubuntu_linux:xen-hypervisor-common, p-cpe:/a:canonical:ubuntu_linux:libxentoolcore1, p-cpe:/a:canonical:ubuntu_linux:xen-system-armhf, p-cpe:/a:canonical:ubuntu_linux:libxenmisc4.11, p-cpe:/a:canonical:ubuntu_linux:libxencall1, p-cpe:/a:canonical:ubuntu_linux:libxenstore3.0, p-cpe:/a:canonical:ubuntu_linux:libxentoollog1, p-cpe:/a:canonical:ubuntu_linux:xen-hypervisor-4.11-armhf, p-cpe:/a:canonical:ubuntu_linux:xen-hypervisor-4.9-arm64, p-cpe:/a:canonical:ubuntu_linux:xen-hypervisor-4.9-armhf, p-cpe:/a:canonical:ubuntu_linux:libxendevicemodel1, p-cpe:/a:canonical:ubuntu_linux:libxenevtchn1

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: 9/19/2022

Vulnerability Publication Date: 12/19/2019

Reference Information

CVE: CVE-2020-0543, CVE-2020-11739, CVE-2020-11740, CVE-2020-11741, CVE-2020-11742, CVE-2020-11743, CVE-2020-15563, CVE-2020-15564, CVE-2020-15565, CVE-2020-15566, CVE-2020-15567, CVE-2020-25595, CVE-2020-25596, CVE-2020-25597, CVE-2020-25599, CVE-2020-25600, CVE-2020-25601, CVE-2020-25602, CVE-2020-25603, CVE-2020-25604

USN: 5617-1