OpenStack Nova up to 19.3.0/20.3.0 virt/libvirt/guest.py Guest.migrate xml external entity reference

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in OpenStack Nova up to 19.3.0/20.3.0. This issue affects the function Guest.migrate in the library virt/libvirt/guest.py. Such manipulation leads to xml external entity reference. This vulnerability is referenced as CVE-2020-17376. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in OpenStack Nova up to 19.3.0/20.3.0 (Cloud Software) and classified as problematic. Affected by this issue is the function Guest.migrate in the library virt/libvirt/guest.py. The manipulation with an unknown input leads to a xml external entity reference vulnerability. Using CWE to declare the problem leads to CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. Impacted is availability. CVE summarizes:

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.

The weakness was published 08/26/2020 (Website). The advisory is shared for download at security.openstack.org. This vulnerability is handled as CVE-2020-17376 since 08/07/2020. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

Upgrading to version 19.3.1, 20.3.1 or 21.0.0 eliminates this vulnerability.

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Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.7

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Xml external entity reference
CWE: CWE-611 / CWE-610
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: OpenStack Nova 19.3.1/20.3.1/21.0.0

Timelineinfo

08/07/2020 🔍
08/26/2020 +19 days 🔍
08/27/2020 +1 days 🔍
11/11/2020 +76 days 🔍

Sourcesinfo

Advisory: security.openstack.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-17376 (🔍)
GCVE (CVE): GCVE-0-2020-17376
GCVE (VulDB): GCVE-100-160340

Entryinfo

Created: 08/27/2020 07:40
Updated: 11/11/2020 16:51
Changes: 08/27/2020 07:40 (39), 08/27/2020 07:45 (18), 11/10/2020 08:46 (1), 11/11/2020 16:51 (1)
Complete: 🔍
Cache ID: 216::103

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