Bug 2265499 (CVE-2024-24474) - CVE-2024-24474 QEMU: esp: integer underflow leads to heap buffer overflow in esp_do_nodma()
Summary: CVE-2024-24474 QEMU: esp: integer underflow leads to heap buffer overflow in ...
Keywords:
Status: NEW
Alias: CVE-2024-24474
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2265500
Blocks:
TreeView+ depends on / blocked
 
Reported: 2024-02-22 12:04 UTC by Mauro Matteo Cascella
Modified: 2024-02-22 13:55 UTC (History)
12 users (show)

Fixed In Version: qemu-kvm 8.2.0
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Doc Text:
A flaw was found in the am53c974 SCSI controller emulation of QEMU. When an SCSI layer transfer is incorrectly terminated, it is possible for a TI command to cause an SCSI buffer overflow due to the expected transfer data length being less than the available data in the FIFO. When this occurs, the unsigned async_len variable underflows and becomes a large offset, which writes past the end of the allocated SCSI buffer. This flaw could allow a malicious guest to crash QEMU and cause a denial of service condition.
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Description Mauro Matteo Cascella 2024-02-22 12:04:06 UTC 
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.

Upstream issue & fix:
https://gitlab.com/qemu-project/qemu/-/issues/1810
https://github.com/qemu/qemu/commit/77668e4b9bca03a856c27ba899a2513ddf52bb52
Comment 1 Mauro Matteo Cascella 2024-02-22 12:07:29 UTC 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 2265500]
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