snapd 2.45.2 on Ubuntu External Media access control

CVSS Meta Temp Score
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CTI Interest Score
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8.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in snapd 2.45.2 on Ubuntu. Impacted is an unknown function of the component External Media Handler. Performing a manipulation results in access control. This vulnerability was named CVE-2020-11933. The attack needs to be approached locally. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in snapd 2.45.2 on Ubuntu. It has been classified as critical. This affects an unknown functionality of the component External Media Handler. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

cloud-init as managed by snapd on Ubuntu Core 16 and Ubuntu Core 18 devices was run without restrictions on every boot, which a physical attacker could exploit by crafting cloud-init user-data/meta-data via external media to perform arbitrary changes on the device to bypass intended security mechanisms such as full disk encryption. This issue did not affect traditional Ubuntu systems. Fixed in snapd version 2.45.2, revision 8539 and core version 2.45.2, revision 9659.

The weakness was presented 07/29/2020 (Website). The advisory is shared at launchpad.net. This vulnerability is uniquely identified as CVE-2020-11933 since 04/20/2020. An attack has to be approached locally. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading eliminates this vulnerability.

See VDB-159154 for similar entry. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.3
VulDB Meta Temp Score: 8.1

VulDB Base Score: 9.3
VulDB Temp Score: 8.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.3
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: No

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: 🔍

Timelineinfo

04/20/2020 🔍
07/29/2020 +100 days 🔍
07/30/2020 +1 days 🔍
11/06/2020 +99 days 🔍

Sourcesinfo

Advisory: launchpad.net
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-11933 (🔍)
GCVE (CVE): GCVE-0-2020-11933
GCVE (VulDB): GCVE-100-159153
See also: 🔍

Entryinfo

Created: 07/30/2020 16:36
Updated: 11/06/2020 14:01
Changes: 07/30/2020 16:36 (39), 07/30/2020 16:41 (11), 11/06/2020 13:53 (1), 11/06/2020 14:01 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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