Vulnerability CVE-2020-25743
Published: 2020-10-06

Description:
hw/ide/pci.c in QEMU before 5.1.1 can trigger a NULL pointer dereference because it lacks a pointer check before an ide_cancel_dma_sync call.

Type:

CWE-476

 (NULL Pointer Dereference)

CVSS2 => (AV:L/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
2.1/10
2.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Redhat -> Openstack platform 
Redhat -> Enterprise linux 
QEMU -> QEMU 

 References:
http://www.openwall.com/lists/oss-security/2020/09/29/1
https://bugzilla.redhat.com/show_bug.cgi?id=1881409
https://lists.nongnu.org/archive/html/qemu-devel/2020-09/msg05967.html
https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Fide_nullptr1b
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