Vulnerability identifier: #VU63778
Vulnerability risk: Low
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-763
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
QEMU
Client/Desktop applications /
Virtualization software
Vendor: QEMU
Description
The vulnerability allows a remote user to escalate privileges on the system.
The vulnerability exists in the USB redirector device emulation of QEMU when dropping packets during a bulk transfer from a SPICE client. A remote user can make QEMU call free() with faked heap chunk metadata to perform a denial of service or escalate privileges on the system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
QEMU: 3.1.1 - 6.1.0 rc2
External links
http://bugzilla.redhat.com/show_bug.cgi?id=1989651
http://security.netapp.com/advisory/ntap-20210902-0006/
http://lists.debian.org/debian-lts-announce/2021/09/msg00000.html
http://www.debian.org/security/2021/dsa-4980
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.