CVE-2020-15852

An issue was discovered in the Linux kernel 5.5 through 5.7.9, as used in Xen through 4.13.x for x86 PV guests. An attacker may be granted the I/O port permissions of an unrelated task. This occurs because tss_invalidate_io_bitmap mishandling causes a loss of synchronization between the I/O bitmaps of TSS and Xen, aka CID-cadfad870154.

CVSS v3.0 7.8 HIGH
CVSS v2.0 4.6 MEDIUM

7.8^/10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

4.6^/10

CVSS v2.0 : MEDIUM

V2 Legend

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

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2	Patch Third Party Advisory
http://xenbits.xen.org/xsa/advisory-329.html	Patch Third Party Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2	Mailing List Patch Vendor Advisory
http://www.openwall.com/lists/oss-security/2020/07/21/2	Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20200810-0001/	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*

Configuration 3 (hide)

OR	cpe:2.3:a:netapp:cloud_backup:-:::::::*
	cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:::::::*
	cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:::::::*

Information

Published : 2020-07-20 12:15

Updated : 2022-12-03 06:32

NVD link : CVE-2020-15852

Mitre link : CVE-2020-15852

JSON object : View

CWE

CWE-276

Incorrect Default Permissions

Products Affected

netapp

cloud_backup
steelstore_cloud_integrated_storage
solidfire_baseboard_management_controller

xen

linux

linux_kernel

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7.8 /10