CVE-2019-20175

HighCVSS 7.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-754

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.htmlExploit, Mailing List, Third Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.htmlMailing List, Third Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.htmlThird Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.htmlMailing List, Patch, Third Party Advisory
https://www.mail-archive.com/qemu-devel%40nongnu.org/msg667396.html
https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.htmlExploit, Mailing List, Third Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.htmlMailing List, Third Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.htmlThird Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.htmlMailing List, Patch, Third Party Advisory
https://www.mail-archive.com/qemu-devel%40nongnu.org/msg667396.html

Timeline

Published: Dec 31, 2019
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2019

CVE-2019-201767.5In Pure-FTPd 1.0.49, a stack exhaustion issue was discovered in the listdir function in ls.c.CVE-2019-201786.5Advisto PEEL Shopping 9.2.1 has CSRF via administrer/utilisateurs.php to delete a user.CVE-2019-201798.8SOPlanning 1.45 has SQL injection via the user_list.php "by" parameter.CVE-2019-20188.8In resetPasswordInternal of DevicePolicyManagerService.java, there is a possible bypass of password reset protection due to an unusual root CVE-2019-201806.8The TablePress plugin 1.9.2 for WordPress allows tablepress[data] CSV injection by Editor users. Note: The vendor disputes this issue and ar CVE-2019-201814.8The awesome-support plugin 5.8.0 for WordPress allows XSS via the post_title parameter.CVE-2019-201824.8The FooGallery plugin 1.8.12 for WordPress allow XSS via the post_title parameter.CVE-2019-201837.2uploadimage.php in Employee Records System 1.0 allows upload and execution of arbitrary PHP code because file-extension validation is only o CVE-2019-201847.8KeePass 2.4.1 allows CSV injection in the title field of a CSV export.CVE-2019-20196.5In ce_t4t_data_cback of ce_t4t.cc, there is a possible out-of-bound read due to a missing bounds check. This could lead to local information CVE-2019-201917.5Oxygen XML Editor 21.1.1 allows XXE to read any file.CVE-2019-201978.8In Nagios XI 5.6.9, an authenticated user is able to execute arbitrary OS commands via shell metacharacters in the id parameter to scheduler