USB Redirector Device Emulation Flaw in QEMU Affects Several Versions
CVE-2021-3682

8.5HIGH

Key Information:

Vendor

Qemu
Status
Qemu
Vendor
CVE Published:
5 August 2021

What is CVE-2021-3682?

A vulnerability exists in the USB redirector device emulation of QEMU, affecting versions prior to 6.1.0-rc2. The issue arises when packets are dropped during a bulk transfer from a SPICE client, leading to a full packet queue. This condition can be exploited by a malicious SPICE client to manipulate QEMU into calling free() with maliciously crafted heap chunk metadata. This exploitation can result in a crash of the QEMU process or, in some scenarios, allow execution of arbitrary code with the privileges of the QEMU process on the host.

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Affected Version(s)

QEMU qemu 6.1.0-rc2

References

https://bugzilla.redhat.com/show_bug.cgi?id=1989651
x_refsource_MISC
https://security.netapp.com/advisory/ntap-20210902-0006/
x_refsource_CONFIRM
https://lists.debian.org/debian-lts-announce/2021/09/msg0...
mailing-listx_refsource_MLIST

CVSS V3.1

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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