Ubuntu.comUB:CVE-2021-20255CVE-2021-20255
CVSS2
Attack Vector
LOCAL
Attack 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
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
AI Score
Confidence
High
EPSS
Percentile
19.0%
A stack overflow via an infinite recursion vulnerability was found in the
eepro100 i8255x device emulator of QEMU. This issue occurs while processing
controller commands due to a DMA reentry issue. This flaw allows a guest
user or process to consume CPU cycles or crash the QEMU process on the
host, resulting in a denial of service. The highest threat from this
vulnerability is to system availability.
Notes
| Author | Note |
|---|---|
| mdeslaur | as of 2023-11-30, proposed patch has not been commited upstream |
References
launchpad.net/bugs/cve/CVE-2021-20255
lists.gnu.org/archive/html/qemu-devel/2021-02/msg06098.html
nvd.nist.gov/vuln/detail/CVE-2021-20255
ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Feepro100_stackoverflow1
security-tracker.debian.org/tracker/CVE-2021-20255
www.cve.org/CVERecord?id=CVE-2021-20255
www.openwall.com/lists/oss-security/2021/02/25/1
Related
CVSS2
Attack Vector
LOCAL
Attack 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
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
AI Score
Confidence
High
EPSS
Percentile
19.0%