CVE-2020-17376

An issue was discovered in Guest.migrate in virt/libvirt/guest.py in OpenStack Nova before 19.3.1, 20.x before 20.3.1, and 21.0.0. By performing a soft reboot of an instance that has previously undergone live migration, a user may gain access to destination host devices that share the same paths as host devices previously referenced by the virtual machine on the source host. This can include block devices that map to different Cinder volumes at the destination than at the source. Only deployments allowing host-based connections (for instance, root and ephemeral devices) are affected.

CVSS v3.0 8.3 HIGH
CVSS v2.0 6.5 MEDIUM

8.3^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

6.5^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://launchpad.net/bugs/1890501	Exploit Third Party Advisory
https://security.openstack.org/ossa/OSSA-2020-006.html	Patch Vendor Advisory
http://www.openwall.com/lists/oss-security/2020/08/25/4	Mailing List Patch Third Party Advisory

Advertisement

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:openstack:nova::::::::
	cpe:2.3:a:openstack:nova::::::::
	cpe:2.3:a:openstack:nova:21.0.0:::::::*

Information

Published : 2020-08-26 12:15

Updated : 2020-09-14 12:00

NVD link : CVE-2020-17376

Mitre link : CVE-2020-17376

JSON object : View

CWE

CWE-611

Improper Restriction of XML External Entity Reference

Advertisement

Products Affected

openstack

nova

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://launchpad.net/bugs/1890501", "name": "https://launchpad.net/bugs/1890501", "tags": ["Exploit", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://security.openstack.org/ossa/OSSA-2020-006.html", "name": "https://security.openstack.org/ossa/OSSA-2020-006.html", "tags": ["Patch", "Vendor Advisory"], "refsource": "CONFIRM"}, {"url": "http://www.openwall.com/lists/oss-security/2020/08/25/4", "name": "http://www.openwall.com/lists/oss-security/2020/08/25/4", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "An issue was discovered in Guest.migrate in virt/libvirt/guest.py in OpenStack Nova before 19.3.1, 20.x before 20.3.1, and 21.0.0. By performing a soft reboot of an instance that has previously undergone live migration, a user may gain access to destination host devices that share the same paths as host devices previously referenced by the virtual machine on the source host. This can include block devices that map to different Cinder volumes at the destination than at the source. Only deployments allowing host-based connections (for instance, root and ephemeral devices) are affected."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-611"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2020-17376", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 6.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P", "authentication": "SINGLE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 8.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.3, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.5, "exploitabilityScore": 2.8}}, "publishedDate": "2020-08-26T19:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:openstack:nova:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "19.3.1"}, {"cpe23Uri": "cpe:2.3:a:openstack:nova:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "20.3.1", "versionStartIncluding": "20.0.0"}, {"cpe23Uri": "cpe:2.3:a:openstack:nova:21.0.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2020-09-14T19:00Z"}