Vulnerability Monitor

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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.

Published

2020-07-20T19:15:11.397

Last Modified

2024-11-21T05:06:18.867

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

CVSSv2 Vector

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

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

3.9

Impact Score

6.4

Weaknesses

Type: Primary
CWE-276

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	linux	linux_kernel	≤ 5.7.9	Yes
Operating System	xen	xen	≤ 4.13.1	Yes
Application	netapp	cloud_backup	-	Yes
Application	netapp	steelstore_cloud_integrated_storage	-	Yes
Hardware	netapp	solidfire_baseboard_management_controller	-	Yes

References

http://www.openwall.com/lists/oss-security/2020/07/21/2 Mailing List, Third Party Advisory ([email protected])
http://xenbits.xen.org/xsa/advisory-329.html Patch, Third Party Advisory ([email protected])
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2 Mailing List, Patch, Vendor Advisory ([email protected])
https://github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2 Patch, Third Party Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20200810-0001/ Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2020/07/21/2 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://xenbits.xen.org/xsa/advisory-329.html Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2 Mailing List, Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20200810-0001/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)