Vulnerability Name:

CVE-2021-3507 (CCN-201362)

Assigned:2021-04-19
Published:2021-04-19
Updated:2023-02-12
Summary:A heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0 (including). It could occur in fdctrl_transfer_handler() in hw/block/fdc.c while processing DMA read data transfers from the floppy drive to the guest system. A privileged guest user could use this flaw to crash the QEMU process on the host resulting in DoS scenario, or potential information leakage from the host memory.
CVSS v3 Severity:6.1 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L)
5.4 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): Low
7.1 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H)
6.3 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): High
4.6 Medium (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:L)
4.1 Medium (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:L/E:U/RL:U/RC:R)
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): Low
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:3.6 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): Partial
6.2 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:C/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-119
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-3507

Source: CCN
Type: Red Hat Bugzilla - Bug 1951118
(CVE-2021-3507) - CVE-2021-3507 QEMU: fdc: heap buffer overflow in DMA read data transfers

Source: secalert@redhat.com
Type: Exploit, Issue Tracking, Third Party Advisory
secalert@redhat.com

Source: XF
Type: UNKNOWN
qemu-cve20213507-dos(201362)

Source: secalert@redhat.com
Type: Mailing List, Third Party Advisory
secalert@redhat.com

Source: secalert@redhat.com
Type: Third Party Advisory
secalert@redhat.com

Source: CCN
Type: QEMU Web site
QEMU

Vulnerable Configuration: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 RedHat 4:
  • cpe:/a:redhat:enterprise_linux:9:*:*:*:*:*:*:*
    • Configuration RedHat 5:
  • cpe:/a:redhat:enterprise_linux:9::appstream:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.redhat.rhsa:def:20227967
    P
    		RHSA-2022:7967: qemu-kvm security, bug fix, and enhancement update (Moderate)
    2022-11-15
    oval:com.redhat.rhsa:def:20227472
    P
    		RHSA-2022:7472: virt:rhel and virt-devel:rhel security, bug fix, and enhancement update (Low)
    2022-11-08
    BACK