Vulnerability Name:

CVE-2021-3930 (CCN-220195)

Assigned:2021-02-04
Published:2021-02-04
Updated:2022-10-25
Summary:An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.
CVSS v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
3.2 Low (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L)
2.8 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
3.2 Low (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L)
2.8 Low (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
1.7 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-193
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-3930

Source: CCN
Type: Red Hat Bugzilla - Bug 2020588
(CVE-2021-3930) - CVE-2021-3930 QEMU: off-by-one error in mode_sense_page() in hw/scsi/scsi-disk.c

Source: MISC
Type: Issue Tracking, Patch, Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2020588

Source: XF
Type: UNKNOWN
qemu-cve20213930-dos(220195)

Source: CCN
Type: QEMU GitLab
hw/scsi/scsi-disk: MODE_PAGE_ALLS not allowed in MODE SELECT commands

Source: MLIST
Type: Mailing List, Third Party Advisory
[debian-lts-announce] 20220404 [SECURITY] [DLA 2970-1] qemu security update

Source: MLIST
Type: Mailing List, Third Party Advisory
[debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security update

Source: GENTOO
Type: Third Party Advisory
GLSA-202208-27

Source: CONFIRM
Type: Third Party Advisory
https://security.netapp.com/advisory/ntap-20220225-0007/

Vulnerable Configuration:Configuration 1:
  • cpe:/a:qemu:qemu:*:*:*:*:*:*:*:* (Version < 6.2.0)

    • Configuration 2:
  • cpe:/a:redhat:openstack:10:*:*:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
  • OR cpe:/a:redhat:openstack:13:*:*:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*
  • OR cpe:/a:redhat:codeready_linux_builder_for_ibm_z_systems:8.0:*:*:*:*:*:*:*
  • OR cpe:/a:redhat:codeready_linux_builder_for_power_little_endian:8.0:*:*:*:*:*:*:*
  • OR cpe:/a:redhat:codeready_linux_builder:8.0:*:*:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux_advanced_virtualization_eus:8.4:*:*:*:*:*:*:*

    • Configuration 3:
  • cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  • OR cpe:/o:debian:debian_linux:10.0:*:*:*:*:*:*:*

    • Configuration RedHat 1:
  • cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*

    • Configuration RedHat 2:
  • cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*

    • Configuration RedHat 3:
  • cpe:/a:redhat:enterprise_linux:8::crb:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:qemu:qemu:-:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:42439
    P
    		Security update for qemu (Important)
    2022-04-20
    oval:org.opensuse.security:def:42359
    P
    		Security update for qemu (Important)
    2022-03-22
    oval:org.opensuse.security:def:102257
    P
    		Security update for qemu (Important)
    2022-03-22
    oval:org.opensuse.security:def:978
    P
    		Security update for qemu (Important)
    2022-03-22
    oval:org.opensuse.security:def:1696
    P
    		Security update for qemu (Important)
    2022-03-22
    oval:org.opensuse.security:def:101670
    P
    		Security update for qemu (Important)
    2022-03-22
    oval:com.redhat.rhsa:def:20215238
    P
    		RHSA-2021:5238: virt:rhel and virt-devel:rhel security update (Low)
    2021-12-21
    oval:org.opensuse.security:def:41886
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:46316
    P
    		Security update for xen (Moderate)
    2021-12-01
    BACK
    qemu qemu *
    redhat openstack 10
    redhat enterprise linux 8.0
    redhat openstack 13
    redhat enterprise linux for power little endian 8.0
    redhat enterprise linux for ibm z systems 8.0
    redhat codeready linux builder for ibm z systems 8.0
    redhat codeready linux builder for power little endian 8.0
    redhat codeready linux builder 8.0
    redhat enterprise linux advanced virtualization eus 8.4
    debian debian linux 9.0
    debian debian linux 10.0
    qemu qemu -