Detections
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Oracle Linux 7 : qemu (ELSA-2021-9285)

medium Nessus Plugin ID 150299

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Synopsis

The remote Oracle Linux host is missing one or more security updates.

Description

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-9285 advisory.

 - In QEMU 4.2.0, a MemoryRegionOps object may lack read/write callback methods, leading to a NULL pointer dereference. (CVE-2020-15469)

 - A flaw was found in the memory management API of QEMU during the initialization of a memory region cache.
 This issue could lead to an out-of-bounds write access to the MSI-X table while performing MMIO operations. A guest user may abuse this flaw to crash the QEMU process on the host, resulting in a denial of service. This flaw affects QEMU versions prior to 5.2.0. (CVE-2020-27821)

 - An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario. (CVE-2021-20221)

 - The patch for CVE-2020-17380/CVE-2020-25085 was found to be ineffective, thus making QEMU vulnerable to the out-of-bounds read/write access issues previously found in the SDHCI controller emulation code. This flaw allows a malicious privileged guest to crash the QEMU process on the host, resulting in a denial of service or potential code execution. QEMU up to (including) 5.2.0 is affected by this. (CVE-2021-3409)

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://linux.oracle.com/errata/ELSA-2021-9285.html

Plugin Details

Severity: Medium

ID: 150299

File Name: oraclelinux_ELSA-2021-9285.nasl

Version: 1.3

Type: local

Agent: unix

Published: 6/6/2021

Updated: 11/21/2022

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2021-3409

CVSS v3

Risk Factor: Medium

Base Score: 5.7

Temporal Score: 5

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

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

Vulnerability Information

CPE: cpe:/o:oracle:linux:7, p-cpe:/a:oracle:linux:ivshmem-tools, p-cpe:/a:oracle:linux:qemu, p-cpe:/a:oracle:linux:qemu-block-gluster, p-cpe:/a:oracle:linux:qemu-block-iscsi, p-cpe:/a:oracle:linux:qemu-block-rbd, p-cpe:/a:oracle:linux:qemu-common, p-cpe:/a:oracle:linux:qemu-img, p-cpe:/a:oracle:linux:qemu-kvm, p-cpe:/a:oracle:linux:qemu-kvm-core, p-cpe:/a:oracle:linux:qemu-system-aarch64, p-cpe:/a:oracle:linux:qemu-system-aarch64-core, p-cpe:/a:oracle:linux:qemu-system-x86, p-cpe:/a:oracle:linux:qemu-system-x86-core

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/OracleLinux

Exploit Ease: No known exploits are available

Patch Publication Date: 6/6/2021

Vulnerability Publication Date: 7/2/2020

Reference Information

CVE: CVE-2020-15469, CVE-2020-27821, CVE-2021-20221, CVE-2021-3409

IAVB: 2020-B-0041-S, 2020-B-0075-S