CVE-2021-3507

Advisory lineage Upstream: 0 Downstream: 12
Modified
Published: 06 May 2021, 15:16
Last modified:03 Aug 2024, 16:53

Vulnerability Summary

Overall Risk (default)
medium
34/100
CVSS Score
6.1 MEDIUM
v3.1 (nvd)
EPSS Score
0.03% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

06 May 2021, 15:16
Published
Vulnerability first disclosed
03 Aug 2024, 16:53
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
  • v2.0•LOW•Score: 3.6AV:L/AC:L/Au:N/C:P/I:N/A:P

EPSS Trends

Current EPSS score: 0.03%• Percentile: 9%

Techniques & Countermeasures

  • CWE-787•Out-of-bounds Write

    The product writes data past the end, or before the beginning, of the intended buffer.

  • CWE-119•Improper Restriction of Operations within the Bounds of a Memory Buffer

    The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Affected Systems

  • debian•debian_linux

    10.0

  • qemu•qemu

    ≤ 6.0.0

  • redhat•enterprise_linux

    8.0

References (3)