6.1
MEDIUM
CVE-2021-3507
QEMU Floppy Disk Emulator Heap Buffer Overflow
Description

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.

INFO

Published Date :

May 6, 2021, 4:15 p.m.

Last Modified :

Feb. 12, 2023, 11:41 p.m.

Remotely Exploitable :

No

Impact Score :

4.2

Exploitability Score :

1.8
Affected Products

The following products are affected by CVE-2021-3507 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Redhat enterprise_linux
1 Debian debian_linux
1 Qemu qemu
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-3507.

URL Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1951118 Exploit Issue Tracking Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20210528-0005/ Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-3507 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-3507 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Feb. 12, 2023

    Action Type Old Value New Value
    Changed Description A heap buffer overflow was found in the floppy disk emulator of QEMU. 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. 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.
    Removed CVSS V3.1 Red Hat, Inc. AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:L
    Removed Reference https://access.redhat.com/errata/RHSA-2022:7472 [No Types Assigned]
    Removed Reference https://access.redhat.com/errata/RHSA-2022:7967 [No Types Assigned]
    Removed Reference https://access.redhat.com/security/cve/CVE-2021-3507 [No Types Assigned]
    Added CWE Red Hat, Inc. CWE-119
  • CVE Modified by [email protected]

    Feb. 02, 2023

    Action Type Old Value New Value
    Changed Description 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. A heap buffer overflow was found in the floppy disk emulator of QEMU. 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.
    Added CVSS V3.1 Red Hat, Inc. AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:L
    Added Reference https://access.redhat.com/errata/RHSA-2022:7967 [No Types Assigned]
    Added Reference https://access.redhat.com/security/cve/CVE-2021-3507 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2022:7472 [No Types Assigned]
    Removed CWE Red Hat, Inc. CWE-119
    Removed CWE Reason CWE-119 / More specific CWE option available
  • Modified Analysis by [email protected]

    Oct. 07, 2022

    Action Type Old Value New Value
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html No Types Assigned https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html Mailing List, Third Party Advisory
    Added CWE NIST CWE-787
    Changed CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:* OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
  • CVE Modified by [email protected]

    Sep. 05, 2022

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html [No Types Assigned]
  • Modified Analysis by [email protected]

    Jun. 01, 2021

    Action Type Old Value New Value
    Changed Reference Type https://security.netapp.com/advisory/ntap-20210528-0005/ No Types Assigned https://security.netapp.com/advisory/ntap-20210528-0005/ Third Party Advisory
  • CVE Modified by [email protected]

    May. 28, 2021

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20210528-0005/ [No Types Assigned]
  • Initial Analysis by [email protected]

    May. 17, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:P/I:N/A:P)
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1951118 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1951118 Exploit, Issue Tracking, Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* versions up to (including) 6.0.0
    Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-3507 is associated with the following CWEs:

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.07 }} 0.02%

score

0.27201

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability