Description
A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:LAttack VectorLocal
AC:HAttack ComplexityHigh
PR:HPrivileges RequiredHigh
UI:NUser InteractionNone
Scope
S:CScopeChanged
Impact
C:HConfidentialityHigh
I:HIntegrityHigh
A:HAvailabilityHigh
Weaknesses
Affected Products
Red Hat Inc.
commercial·USaka redhat, red hat
Сообщество свободного программного обеспечения
oss-projectaka fsf
ООО «Ред Софт»
commercial·RUaka red soft
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Fabrice Bellard
individual-dev·FR
АО «НППКТ»
commercial·RU
and 6 more affected products View all →
Exploitability
Official Patch Available
Attack Graph
Products CVE Techniques Tactics
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MITRE ATT&CK
2 techniques Initial Access
Privilege Escalation
References
https://access.redhat.com/security/cve/cve-2021-3748
access.redhat.com
https://www.cybersecurity-help.cz/vdb/SB2021120921
cybersecurity-help.cz
https://bugzilla.redhat.com/show_bug.cgi?id=1998514
bugzilla.redhat.com
and 13 more references View all →
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