CVE-2019-20175

** DISPUTED ** An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). NOTE: a member of the QEMU security team disputes the significance of this issue because a "privileged guest user has many ways to cause similar DoS effect, without triggering this assert."

CVSS v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.html	Exploit Mailing List Third Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.html	Mailing List Third Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.html	Third Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.html	Mailing List Patch Third Party Advisory
https://www.mail-archive.com/qemu-devel@nongnu.org/msg667396.html	Patch Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*

Information

Published : 2019-12-30 20:15

Updated : 2020-01-15 06:11

NVD link : CVE-2019-20175

Mitre link : CVE-2019-20175

JSON object : View

CWE

CWE-754

Improper Check for Unusual or Exceptional Conditions

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Products Affected

qemu

qemu

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