CVE-2021-3507
Publication date 6 May 2021
Last updated 24 July 2024
Ubuntu priority
Cvss 3 Severity Score
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.
Status
Package | Ubuntu Release | Status |
---|---|---|
qemu | 24.04 LTS noble |
Fixed 1:6.2+dfsg-2ubuntu8
|
22.04 LTS jammy |
Fixed 1:6.2+dfsg-2ubuntu6.2
|
|
20.04 LTS focal |
Fixed 1:4.2-3ubuntu6.23
|
|
18.04 LTS bionic |
Fixed 1:2.11+dfsg-1ubuntu7.40
|
|
16.04 LTS xenial |
Vulnerable
|
|
14.04 LTS trusty |
Vulnerable
|
|
qemu-kvm | 24.04 LTS noble | Not in release |
22.04 LTS jammy | Not in release | |
20.04 LTS focal | Not in release | |
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release |
Patch details
Package | Patch details |
---|---|
qemu |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.1 · Medium |
Attack vector | Local |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | None |
Availability impact | Low |
Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L |
References
Related Ubuntu Security Notices (USN)
- USN-5489-1
- QEMU vulnerabilities
- 21 June 2022