CVE-2020-8835

CVSS V2 High 7.2 CVSS V3 High 7.8

Description

In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)

Overview

CVE ID
CVE-2020-8835

Assigner
security@ubuntu.com

Vulnerability Status
Analyzed

Published Version
2020-04-02T18:15:18

Last Modified Date
2023-02-24T18:42:39

Weakness Enumerations

CWE	URL
CWE-125	http://cwe.mitre.org/data/definitions/125.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
		AND
cpe:2.3:o:linux:linux_kernel::::::::	1	OR	5.4.7	5.4.29
cpe:2.3:o:linux:linux_kernel::::::::	1	OR	5.5.0	5.5.14
		AND
cpe:2.3:o:fedoraproject:fedora:30:::::::*	1	OR
cpe:2.3:o:fedoraproject:fedora:31:::::::*	1	OR
cpe:2.3:o:fedoraproject:fedora:32:::::::*	1	OR
		AND
cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:19.10:::::::*	1	OR
		AND
cpe:2.3:a:netapp:cloud_backup:-:::::::*	1	OR
cpe:2.3:a:netapp:hci_management_node:-:::::::*	1	OR
cpe:2.3:a:netapp:solidfire:-:::::::*	1	OR
cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:::::::*	1	OR
		AND
cpe:2.3:o:netapp:a700s_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:a700s:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:8300_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:8300:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:8700_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:8700:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:a400_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:a400:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:a320_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:a320:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:c190_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:c190:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:a220_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:a220:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:fas2720_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:fas2720:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:fas2750_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:fas2750:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:a800_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:a800:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h300s_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h300s:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h500s_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h500s:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h700s_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h700s:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h300e_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h300e:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h500e_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h500e:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h700e_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h700e:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h410s_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h410s:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h610c_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h610c:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h610s_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h610s:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h615c_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h615c:-:::::::*	0	OR

CVSS Version 2

Version
2.0

Vector String
AV:L/AC:L/Au:N/C:C/I:C/A:C

Access Vector
LOCAL

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
COMPLETE

Integrity Impact
COMPLETE

Availability Impact
COMPLETE

Base Score
7.2

Severity
HIGH

Exploitability Score
3.9

Impact Score
10

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL

Attack Compatibility
LOW

Privileges Required
LOW

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
HIGH

Base Score
7.8

Base Severity
HIGH

Exploitability Score
1.8

Impact Score
5.9

References

Reference URL	Reference Tags
https://www.openwall.com/lists/oss-security/2020/03/30/3	Mailing List Patch Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef	Patch Vendor Advisory
https://www.thezdi.com/blog/2020/3/19/pwn2own-2020-day-one-results	Third Party Advisory
https://lore.kernel.org/bpf/20200330160324.15259-1-daniel@iogearbox.net/T/	Patch Vendor Advisory
https://usn.ubuntu.com/usn/usn-4313-1	Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef	Patch Vendor Advisory
https://usn.ubuntu.com/4313-1/	Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F7OONYGMSYBEFHLHZJK3GOI5Z553G4LD/	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YXBWSHZ6DJIZVXKXGZPK6QPFCY7VKZEG/	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TF4PQZBEPNXDSK5DOBMW54OCLP25FTCD/	Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20200430-0004/	Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/07/20/1	Exploit Mailing List Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2020-8835
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8835

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 06:26:22				Added to TrackCVE
2022-12-04 13:52:34	2020-04-02T18:15Z	2020-04-02T18:15:18	CVE Published Date	updated
2022-12-04 13:52:34		2022-04-26T17:05:28	CVE Modified Date	updated
2022-12-04 13:52:34		Analyzed	Vulnerability Status	updated
2023-02-23 17:09:35	Analyzed	Undergoing Analysis	Vulnerability Status	updated
2023-02-24 19:10:19		2023-02-24T18:42:39	CVE Modified Date	updated
2023-02-24 19:10:19	Undergoing Analysis	Analyzed	Vulnerability Status	updated