Unrated severityNVD Advisory· Published Dec 31, 2019· Updated Aug 5, 2024
CVE-2019-20175
CVE-2019-20175
Description
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.
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Affected products
2- QEMU/QEMUdescription
Patches
Vulnerability mechanics
References
5- lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.htmlmitrex_refsource_MISC
- lists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.htmlmitrex_refsource_MISC
- lists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.htmlmitrex_refsource_MISC
- lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.htmlmitrex_refsource_MISC
- www.mail-archive.com/qemu-devel%40nongnu.org/msg667396.htmlmitrex_refsource_MISC
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