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AmazonALAS2-2023-2060HistoryMay 25, 2023 - 5:41 p.m.
Low: qemu
2023-05-2517:41:00
alas.aws.amazon.com
11
qemu
e1000 nic
infinite loop
denial of service
cve-2021-20257
amazon linux 2
update
package.
2.1 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
6.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
6.5 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
14.4%
Issue Overview:
An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability. (CVE-2021-20257)
Affected Packages:
qemu
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update qemu to update your system.
New Packages:
aarch64:
qemu-3.1.0-8.amzn2.0.9.aarch64
qemu-common-3.1.0-8.amzn2.0.9.aarch64
qemu-guest-agent-3.1.0-8.amzn2.0.9.aarch64
qemu-img-3.1.0-8.amzn2.0.9.aarch64
ivshmem-tools-3.1.0-8.amzn2.0.9.aarch64
qemu-block-curl-3.1.0-8.amzn2.0.9.aarch64
qemu-block-dmg-3.1.0-8.amzn2.0.9.aarch64
qemu-block-iscsi-3.1.0-8.amzn2.0.9.aarch64
qemu-block-nfs-3.1.0-8.amzn2.0.9.aarch64
qemu-block-rbd-3.1.0-8.amzn2.0.9.aarch64
qemu-block-ssh-3.1.0-8.amzn2.0.9.aarch64
qemu-audio-alsa-3.1.0-8.amzn2.0.9.aarch64
qemu-audio-oss-3.1.0-8.amzn2.0.9.aarch64
qemu-audio-pa-3.1.0-8.amzn2.0.9.aarch64
qemu-audio-sdl-3.1.0-8.amzn2.0.9.aarch64
qemu-ui-curses-3.1.0-8.amzn2.0.9.aarch64
qemu-ui-gtk-3.1.0-8.amzn2.0.9.aarch64
qemu-ui-sdl-3.1.0-8.amzn2.0.9.aarch64
qemu-kvm-3.1.0-8.amzn2.0.9.aarch64
qemu-kvm-core-3.1.0-8.amzn2.0.9.aarch64
qemu-user-3.1.0-8.amzn2.0.9.aarch64
qemu-user-binfmt-3.1.0-8.amzn2.0.9.aarch64
qemu-user-static-3.1.0-8.amzn2.0.9.aarch64
qemu-system-aarch64-3.1.0-8.amzn2.0.9.aarch64
qemu-system-aarch64-core-3.1.0-8.amzn2.0.9.aarch64
qemu-system-x86-3.1.0-8.amzn2.0.9.aarch64
qemu-system-x86-core-3.1.0-8.amzn2.0.9.aarch64
qemu-debuginfo-3.1.0-8.amzn2.0.9.aarch64
i686:
qemu-3.1.0-8.amzn2.0.9.i686
qemu-common-3.1.0-8.amzn2.0.9.i686
qemu-guest-agent-3.1.0-8.amzn2.0.9.i686
qemu-img-3.1.0-8.amzn2.0.9.i686
ivshmem-tools-3.1.0-8.amzn2.0.9.i686
qemu-block-curl-3.1.0-8.amzn2.0.9.i686
qemu-block-dmg-3.1.0-8.amzn2.0.9.i686
qemu-block-iscsi-3.1.0-8.amzn2.0.9.i686
qemu-block-nfs-3.1.0-8.amzn2.0.9.i686
qemu-block-ssh-3.1.0-8.amzn2.0.9.i686
qemu-audio-alsa-3.1.0-8.amzn2.0.9.i686
qemu-audio-oss-3.1.0-8.amzn2.0.9.i686
qemu-audio-pa-3.1.0-8.amzn2.0.9.i686
qemu-audio-sdl-3.1.0-8.amzn2.0.9.i686
qemu-ui-curses-3.1.0-8.amzn2.0.9.i686
qemu-ui-gtk-3.1.0-8.amzn2.0.9.i686
qemu-ui-sdl-3.1.0-8.amzn2.0.9.i686
qemu-kvm-3.1.0-8.amzn2.0.9.i686
qemu-kvm-core-3.1.0-8.amzn2.0.9.i686
qemu-user-3.1.0-8.amzn2.0.9.i686
qemu-user-binfmt-3.1.0-8.amzn2.0.9.i686
qemu-user-static-3.1.0-8.amzn2.0.9.i686
qemu-system-aarch64-3.1.0-8.amzn2.0.9.i686
qemu-system-aarch64-core-3.1.0-8.amzn2.0.9.i686
qemu-system-x86-3.1.0-8.amzn2.0.9.i686
qemu-system-x86-core-3.1.0-8.amzn2.0.9.i686
qemu-debuginfo-3.1.0-8.amzn2.0.9.i686
src:
qemu-3.1.0-8.amzn2.0.9.src
x86_64:
qemu-3.1.0-8.amzn2.0.9.x86_64
qemu-common-3.1.0-8.amzn2.0.9.x86_64
qemu-guest-agent-3.1.0-8.amzn2.0.9.x86_64
qemu-img-3.1.0-8.amzn2.0.9.x86_64
ivshmem-tools-3.1.0-8.amzn2.0.9.x86_64
qemu-block-curl-3.1.0-8.amzn2.0.9.x86_64
qemu-block-dmg-3.1.0-8.amzn2.0.9.x86_64
qemu-block-iscsi-3.1.0-8.amzn2.0.9.x86_64
qemu-block-nfs-3.1.0-8.amzn2.0.9.x86_64
qemu-block-rbd-3.1.0-8.amzn2.0.9.x86_64
qemu-block-ssh-3.1.0-8.amzn2.0.9.x86_64
qemu-audio-alsa-3.1.0-8.amzn2.0.9.x86_64
qemu-audio-oss-3.1.0-8.amzn2.0.9.x86_64
qemu-audio-pa-3.1.0-8.amzn2.0.9.x86_64
qemu-audio-sdl-3.1.0-8.amzn2.0.9.x86_64
qemu-ui-curses-3.1.0-8.amzn2.0.9.x86_64
qemu-ui-gtk-3.1.0-8.amzn2.0.9.x86_64
qemu-ui-sdl-3.1.0-8.amzn2.0.9.x86_64
qemu-kvm-3.1.0-8.amzn2.0.9.x86_64
qemu-kvm-core-3.1.0-8.amzn2.0.9.x86_64
qemu-user-3.1.0-8.amzn2.0.9.x86_64
qemu-user-binfmt-3.1.0-8.amzn2.0.9.x86_64
qemu-user-static-3.1.0-8.amzn2.0.9.x86_64
qemu-system-aarch64-3.1.0-8.amzn2.0.9.x86_64
qemu-system-aarch64-core-3.1.0-8.amzn2.0.9.x86_64
qemu-system-x86-3.1.0-8.amzn2.0.9.x86_64
qemu-system-x86-core-3.1.0-8.amzn2.0.9.x86_64
qemu-debuginfo-3.1.0-8.amzn2.0.9.x86_64
Additional References
Red Hat: CVE-2021-20257
Mitre: CVE-2021-20257
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Amazon Linux | 2 | aarch64 | qemu | < 3.1.0-8.amzn2.0.9 | qemu-3.1.0-8.amzn2.0.9.aarch64.rpm |
| Amazon Linux | 2 | aarch64 | qemu-common | < 3.1.0-8.amzn2.0.9 | qemu-common-3.1.0-8.amzn2.0.9.aarch64.rpm |
| Amazon Linux | 2 | aarch64 | qemu-guest-agent | < 3.1.0-8.amzn2.0.9 | qemu-guest-agent-3.1.0-8.amzn2.0.9.aarch64.rpm |
| Amazon Linux | 2 | aarch64 | qemu-img | < 3.1.0-8.amzn2.0.9 | qemu-img-3.1.0-8.amzn2.0.9.aarch64.rpm |
| Amazon Linux | 2 | aarch64 | ivshmem-tools | < 3.1.0-8.amzn2.0.9 | ivshmem-tools-3.1.0-8.amzn2.0.9.aarch64.rpm |
| Amazon Linux | 2 | aarch64 | qemu-block-curl | < 3.1.0-8.amzn2.0.9 | qemu-block-curl-3.1.0-8.amzn2.0.9.aarch64.rpm |
| Amazon Linux | 2 | aarch64 | qemu-block-dmg | < 3.1.0-8.amzn2.0.9 | qemu-block-dmg-3.1.0-8.amzn2.0.9.aarch64.rpm |
| Amazon Linux | 2 | aarch64 | qemu-block-iscsi | < 3.1.0-8.amzn2.0.9 | qemu-block-iscsi-3.1.0-8.amzn2.0.9.aarch64.rpm |
| Amazon Linux | 2 | aarch64 | qemu-block-nfs | < 3.1.0-8.amzn2.0.9 | qemu-block-nfs-3.1.0-8.amzn2.0.9.aarch64.rpm |
| Amazon Linux | 2 | aarch64 | qemu-block-rbd | < 3.1.0-8.amzn2.0.9 | qemu-block-rbd-3.1.0-8.amzn2.0.9.aarch64.rpm |
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2.1 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
6.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
6.5 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
14.4%
Related for ALAS2-2023-2060