Ubuntu.comUB:CVE-2021-3527CVE-2021-3527
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
0.0004 Low
EPSS
Percentile
13.3%
A flaw was found in the USB redirector device (usb-redir) of QEMU. Small
USB packets are combined into a single, large transfer request, to reduce
the overhead and improve performance. The combined size of the bulk
transfer is used to dynamically allocate a variable length array (VLA) on
the stack without proper validation. Since the total size is not bounded, a
malicious guest could use this flaw to influence the array length and cause
the QEMU process to perform an excessive allocation on the stack, resulting
in a denial of service.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | qemu | < 1:2.11+dfsg-1ubuntu7.37 | UNKNOWN |
| ubuntu | 20.04 | noarch | qemu | < 1:4.2-3ubuntu6.17 | UNKNOWN |
| ubuntu | 20.10 | noarch | qemu | < 1:5.0-5ubuntu9.9 | UNKNOWN |
| ubuntu | 21.04 | noarch | qemu | < 1:5.2+dfsg-9ubuntu3.1 | UNKNOWN |
| ubuntu | 21.10 | noarch | qemu | < 1:6.0+dfsg-2expubuntu1 | UNKNOWN |
| ubuntu | 22.04 | noarch | qemu | < 1:6.0+dfsg-2expubuntu1 | UNKNOWN |
| ubuntu | 22.10 | noarch | qemu | < 1:6.0+dfsg-2expubuntu1 | UNKNOWN |
| ubuntu | 23.04 | noarch | qemu | < 1:6.0+dfsg-2expubuntu1 | UNKNOWN |
| ubuntu | 23.10 | noarch | qemu | < 1:6.0+dfsg-2expubuntu1 | UNKNOWN |
| ubuntu | 14.04 | noarch | qemu | < any | UNKNOWN |
References
launchpad.net/bugs/cve/CVE-2021-3527
lists.nongnu.org/archive/html/qemu-devel/2021-05/msg00564.html
lists.nongnu.org/archive/html/qemu-devel/2021-05/msg01372.html
lists.nongnu.org/archive/html/qemu-devel/2021-05/msg01373.html
nvd.nist.gov/vuln/detail/CVE-2021-3527
security-tracker.debian.org/tracker/CVE-2021-3527
ubuntu.com/security/notices/USN-5010-1
www.cve.org/CVERecord?id=CVE-2021-3527
Related
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
0.0004 Low
EPSS
Percentile
13.3%