Vulnerability Monitor

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CVE-2020-25221

get_gate_page in mm/gup.c in the Linux kernel 5.7.x and 5.8.x before 5.8.7 allows privilege escalation because of incorrect reference counting (caused by gate page mishandling) of the struct page that backs the vsyscall page. The result is a refcount underflow. This can be triggered by any 64-bit process that can use ptrace() or process_vm_readv(), aka CID-9fa2dd946743.

Published

2020-09-10T14:15:17.590

Last Modified

2024-11-21T05:17:41.827

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

CVSSv2 Vector

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

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

Exploitability Score

3.9

Impact Score

10.0

Weaknesses

Type: Primary
CWE-672

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	linux	linux_kernel	< 5.8.7	Yes
Application	netapp	cloud_backup	-	Yes
Application	netapp	solidfire\,_enterprise_sds_\&_hci_storage_node	-	Yes
Application	netapp	solidfire_\&_hci_management_node	-	Yes
Hardware	netapp	hci_compute_node	-	Yes
Hardware	netapp	solidfire_baseboard_management_controller	-	Yes

References

http://www.openwall.com/lists/oss-security/2020/09/10/4 Mailing List, Third Party Advisory ([email protected])
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.7 Release Notes, Vendor Advisory ([email protected])
https://git.kernel.org/linus/8891adc61dce2a8a41fc0c23262b681c3ec4b73a Issue Tracking, Patch, Vendor Advisory ([email protected])
https://git.kernel.org/linus/9fa2dd946743ae6f30dc4830da19147bf100a7f2 Issue Tracking, Patch, Vendor Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20201001-0003/ Third Party Advisory ([email protected])
https://www.openwall.com/lists/oss-security/2020/09/08/4 Mailing List, Patch, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2020/09/10/4 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.7 Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://git.kernel.org/linus/8891adc61dce2a8a41fc0c23262b681c3ec4b73a Issue Tracking, Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://git.kernel.org/linus/9fa2dd946743ae6f30dc4830da19147bf100a7f2 Issue Tracking, Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20201001-0003/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.openwall.com/lists/oss-security/2020/09/08/4 Mailing List, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)