Debian DLA-2560-1 : qemu security update

high Nessus Plugin ID 146609
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 Debian host is missing a security update.

Description

Several vulnerabilities were discovered in QEMU, a fast processor emulator (notably used in KVM and Xen HVM virtualization). An attacker could trigger a denial of service (DoS), information leak, and possibly execute arbitrary code with the privileges of the QEMU process on the host.

CVE-2020-15469

A MemoryRegionOps object may lack read/write callback methods, leading to a NULL pointer dereference.

CVE-2020-15859

QEMU has a use-after-free in hw/net/e1000e_core.c because a guest OS user can trigger an e1000e packet with the data's address set to the e1000e's MMIO address.

CVE-2020-25084

QEMU has a use-after-free in hw/usb/hcd-xhci.c because the usb_packet_map return value is not checked.

CVE-2020-28916

hw/net/e1000e_core.c has an infinite loop via an RX descriptor with a NULL buffer address.

CVE-2020-29130

slirp.c has a buffer over-read because it tries to read a certain amount of header data even if that exceeds the total packet length.

CVE-2020-29443

ide_atapi_cmd_reply_end in hw/ide/atapi.c allows out-of-bounds read access because a buffer index is not validated.

CVE-2021-20181

9pfs: ZDI-CAN-10904: QEMU Plan 9 file system TOCTOU privilege escalation vulnerability.

CVE-2021-20221

aarch64: GIC: out-of-bound heap buffer access via an interrupt ID field.

For Debian 9 stretch, these problems have been fixed in version 1:2.8+dfsg-6+deb9u13.

We recommend that you upgrade your qemu packages.

For the detailed security status of qemu please refer to its security tracker page at: https://security-tracker.debian.org/tracker/qemu

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2021/02/msg00024.html

https://packages.debian.org/source/stretch/qemu

https://security-tracker.debian.org/tracker/source-package/qemu

Plugin Details

Severity: High

ID: 146609

File Name: debian_DLA-2560.nasl

Version: 1.4

Type: local

Agent: unix

Published: 2/19/2021

Updated: 6/8/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2021-20181

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.1

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

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

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:qemu, p-cpe:/a:debian:debian_linux:qemu-block-extra, p-cpe:/a:debian:debian_linux:qemu-guest-agent, p-cpe:/a:debian:debian_linux:qemu-kvm, p-cpe:/a:debian:debian_linux:qemu-system, p-cpe:/a:debian:debian_linux:qemu-system-arm, p-cpe:/a:debian:debian_linux:qemu-system-common, p-cpe:/a:debian:debian_linux:qemu-system-mips, p-cpe:/a:debian:debian_linux:qemu-system-misc, p-cpe:/a:debian:debian_linux:qemu-system-ppc, p-cpe:/a:debian:debian_linux:qemu-system-sparc, p-cpe:/a:debian:debian_linux:qemu-system-x86, p-cpe:/a:debian:debian_linux:qemu-user, p-cpe:/a:debian:debian_linux:qemu-user-binfmt, p-cpe:/a:debian:debian_linux:qemu-user-static, p-cpe:/a:debian:debian_linux:qemu-utils, cpe:/o:debian:debian_linux:9.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/18/2021

Vulnerability Publication Date: 7/2/2020

Reference Information

CVE: CVE-2020-15469, CVE-2020-15859, CVE-2020-25084, CVE-2020-28916, CVE-2020-29130, CVE-2020-29443, CVE-2021-20181, CVE-2021-20221