CVE-2021-20257

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-20257
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.

6.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.0 / Impact : 4.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

2.1 /10

CVSS v2.0 : LOW

V2 Legend

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

Exploitability : 3.9 / Impact : 2.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References
Link Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1930087 Issue Tracking Patch Third Party Advisory
https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html Mailing List Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html Mailing List Patch Vendor Advisory
https://security.gentoo.org/glsa/202208-27 Third Party Advisory
https://security.netapp.com/advisory/ntap-20220425-0003/ Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/02/25/2 Mailing List Patch Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1930087 Issue Tracking Patch Third Party Advisory
https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html Mailing List Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html Mailing List Patch Vendor Advisory
https://security.gentoo.org/glsa/202208-27 Third Party Advisory
https://security.netapp.com/advisory/ntap-20220425-0003/ Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/02/25/2 Mailing List Patch Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

Configuration 3 (hide)

OR cpe:2.3:a:redhat:openstack_platform:10.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*

Configuration 4 (hide)

AND
cpe:2.3:a:redhat:codeready_linux_builder:-:*:*:*:*:*:*:*
OR cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*

Configuration 5 (hide)

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
History

21 Nov 2024, 05:46

Type Values Removed Values Added
References () https://bugzilla.redhat.com/show_bug.cgi?id=1930087 - Issue Tracking, Patch, Third Party Advisory () https://bugzilla.redhat.com/show_bug.cgi?id=1930087 - Issue Tracking, Patch, Third Party Advisory
References () https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8 - Patch, Third Party Advisory () https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8 - Patch, Third Party Advisory
References () https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html - Mailing List, Third Party Advisory () https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html - Mailing List, Third Party Advisory
References () https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html - Mailing List, Patch, Vendor Advisory () https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html - Mailing List, Patch, Vendor Advisory
References () https://security.gentoo.org/glsa/202208-27 - Third Party Advisory () https://security.gentoo.org/glsa/202208-27 - Third Party Advisory
References () https://security.netapp.com/advisory/ntap-20220425-0003/ - Third Party Advisory () https://security.netapp.com/advisory/ntap-20220425-0003/ - Third Party Advisory
References () https://www.openwall.com/lists/oss-security/2021/02/25/2 - Mailing List, Patch, Third Party Advisory () https://www.openwall.com/lists/oss-security/2021/02/25/2 - Mailing List, Patch, Third Party Advisory

05 Sep 2022, 06:15

Type Values Removed Values Added
References
  • (MLIST) https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html -

15 Aug 2022, 11:15

Type Values Removed Values Added
References
  • (GENTOO) https://security.gentoo.org/glsa/202208-27 -

12 May 2022, 20:47

Type Values Removed Values Added
CPE cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openstack_platform:10.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:codeready_linux_builder:-:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
References (CONFIRM) https://security.netapp.com/advisory/ntap-20220425-0003/ - (CONFIRM) https://security.netapp.com/advisory/ntap-20220425-0003/ - Third Party Advisory

25 Apr 2022, 21:15

Type Values Removed Values Added
References
  • (CONFIRM) https://security.netapp.com/advisory/ntap-20220425-0003/ -

22 Mar 2022, 17:06

Type Values Removed Values Added
CWE CWE-835
CPE cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : 2.1
v3 : 6.5
References (MISC) https://www.openwall.com/lists/oss-security/2021/02/25/2 - (MISC) https://www.openwall.com/lists/oss-security/2021/02/25/2 - Mailing List, Patch, Third Party Advisory
References (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=1930087 - (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=1930087 - Issue Tracking, Patch, Third Party Advisory
References (MISC) https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8 - (MISC) https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8 - Patch, Third Party Advisory
References (MISC) https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html - (MISC) https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html - Mailing List, Patch, Vendor Advisory

16 Mar 2022, 15:15

Type Values Removed Values Added
New CVE
Information

Published : 2022-03-16 15:15

Updated : 2024-11-21 05:46

NVD link : CVE-2021-20257

Mitre link : CVE-2021-20257

CVE.ORG link : CVE-2021-20257

JSON object : View

Products Affected

qemu

  • qemu

fedoraproject

  • fedora

redhat

  • enterprise_linux
  • codeready_linux_builder
  • openstack_platform
  • enterprise_linux_for_ibm_z_systems
  • enterprise_linux_for_power_little_endian

debian

  • debian_linux
CWE
CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')