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Vulnerability Details :

CVE-2020-16123

Summary
Assigner-canonical
Assigner Org ID-cc1ad9ee-3454-478d-9317-d3e869d708bc
Published At-03 Dec, 2020 | 23:15
Updated At-16 Sep, 2024 | 19:20
Rejected At-
Credits

Bypass of snapd pulseaudio restrictions

An Ubuntu-specific patch in PulseAudio created a race condition where the snap policy module would fail to identify a client connection from a snap as coming from a snap if SCM_CREDENTIALS were missing, allowing the snap to connect to PulseAudio without proper confinement. This could be exploited by an attacker to expose sensitive information. Fixed in 1:13.99.3-1ubuntu2, 1:13.99.2-1ubuntu2.1, 1:13.99.1-1ubuntu3.8, 1:11.1-1ubuntu7.11, and 1:8.0-0ubuntu3.15.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:canonical
Assigner Org ID:cc1ad9ee-3454-478d-9317-d3e869d708bc
Published At:03 Dec, 2020 | 23:15
Updated At:16 Sep, 2024 | 19:20
Rejected At:
▼CVE Numbering Authority (CNA)
Bypass of snapd pulseaudio restrictions

An Ubuntu-specific patch in PulseAudio created a race condition where the snap policy module would fail to identify a client connection from a snap as coming from a snap if SCM_CREDENTIALS were missing, allowing the snap to connect to PulseAudio without proper confinement. This could be exploited by an attacker to expose sensitive information. Fixed in 1:13.99.3-1ubuntu2, 1:13.99.2-1ubuntu2.1, 1:13.99.1-1ubuntu3.8, 1:11.1-1ubuntu7.11, and 1:8.0-0ubuntu3.15.

Affected Products
Vendor
Canonical Ltd.Canonical
Product
pulseaudio
Versions
Affected
  • From 1:13.99.3-1 before 1:13.99.3-1ubuntu2 (custom)
  • From 1:13.99.2-1 before 1:13.99.2-1ubuntu2.1 (custom)
  • From 1:13.99.1-1 before 1:13.99.1-1ubuntu3.8 (custom)
  • From 1:11.1-1 before 1:11.1-1ubuntu7.11 (custom)
  • From 1:8.0-0 before 1:8.0-0ubuntu3.15 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-362CWE-362 Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)
Type: CWE
CWE ID: CWE-362
Description: CWE-362 Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)
Metrics
VersionBase scoreBase severityVector
3.14.4MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
Version: 3.1
Base score: 4.4
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

James Henstridge
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://launchpad.net/bugs/1895928
vendor-advisory
x_refsource_UBUNTU
https://ubuntu.com/USN-4640-1
vendor-advisory
x_refsource_UBUNTU
Hyperlink: https://launchpad.net/bugs/1895928
Resource:
vendor-advisory
x_refsource_UBUNTU
Hyperlink: https://ubuntu.com/USN-4640-1
Resource:
vendor-advisory
x_refsource_UBUNTU
▼Authorized Data Publishers (ADP)
CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://launchpad.net/bugs/1895928
vendor-advisory
x_refsource_UBUNTU
x_transferred
https://ubuntu.com/USN-4640-1
vendor-advisory
x_refsource_UBUNTU
x_transferred
Hyperlink: https://launchpad.net/bugs/1895928
Resource:
vendor-advisory
x_refsource_UBUNTU
x_transferred
Hyperlink: https://ubuntu.com/USN-4640-1
Resource:
vendor-advisory
x_refsource_UBUNTU
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@ubuntu.com
Published At:04 Dec, 2020 | 00:15
Updated At:10 Dec, 2020 | 14:52

An Ubuntu-specific patch in PulseAudio created a race condition where the snap policy module would fail to identify a client connection from a snap as coming from a snap if SCM_CREDENTIALS were missing, allowing the snap to connect to PulseAudio without proper confinement. This could be exploited by an attacker to expose sensitive information. Fixed in 1:13.99.3-1ubuntu2, 1:13.99.2-1ubuntu2.1, 1:13.99.1-1ubuntu3.8, 1:11.1-1ubuntu7.11, and 1:8.0-0ubuntu3.15.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.14.7MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Secondary3.14.4MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
Primary2.02.1LOW
AV:L/AC:L/Au:N/C:P/I:N/A:N
Type: Primary
Version: 3.1
Base score: 4.7
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Type: Secondary
Version: 3.1
Base score: 4.4
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
Type: Primary
Version: 2.0
Base score: 2.1
Base severity: LOW
Vector:
AV:L/AC:L/Au:N/C:P/I:N/A:N
CPE Matches

Canonical Ltd.
canonical
>>ubuntu_linux>>16.04
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
Canonical Ltd.
canonical
>>ubuntu_linux>>18.04
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
Canonical Ltd.
canonical
>>ubuntu_linux>>20.04
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
Canonical Ltd.
canonical
>>ubuntu_linux>>20.10
cpe:2.3:o:canonical:ubuntu_linux:20.10:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-362Primarynvd@nist.gov
CWE-362Secondarysecurity@ubuntu.com
CWE ID: CWE-362
Type: Primary
Source: nvd@nist.gov
CWE ID: CWE-362
Type: Secondary
Source: security@ubuntu.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://launchpad.net/bugs/1895928security@ubuntu.com
Exploit
Issue Tracking
Third Party Advisory
https://ubuntu.com/USN-4640-1security@ubuntu.com
Patch
Third Party Advisory
Hyperlink: https://launchpad.net/bugs/1895928
Source: security@ubuntu.com
Resource:
Exploit
Issue Tracking
Third Party Advisory
Hyperlink: https://ubuntu.com/USN-4640-1
Source: security@ubuntu.com
Resource:
Patch
Third Party Advisory

Change History

0
Information is not available yet

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