CVE-2024-24474

Description

QEMU before 8.2.0 has an integer underflow, and resultant buffer overflow, via a TI command when an expected non-DMA transfer length is less than the length of the available FIFO data. This occurs in esp_do_nodma in hw/scsi/esp.c because of an underflow of async_len.

CVSS Metrics

• v3.1•HIGH•Score: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.61%• Percentile: 70%

Techniques & Countermeasures

• CWE-191•Integer Underflow (Wrap or Wraparound)

  The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

• CWE-120•Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

  The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

Affected Systems

• qemu•qemu

  < 8.2.0

References (4)

• https://gitlab.com/qemu-project/qemu/-/issues/1810
• https://github.com/qemu/qemu/commit/77668e4b9bca03a856c27ba899a2513ddf52bb52
• https://gist.github.com/1047524396/5ce07b9d387095c276b1cd234ae5615e
• https://security.netapp.com/advisory/ntap-20240510-0012/