CVE-2020-27838
Scores
EPSS
Percentile: 78.3%
CVSS
CVSS Score: 5.3/10
All CVSS Scores
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
High (H)
Describes the conditions beyond the attacker's control
Privileges Required
None (N)
Describes the level of privileges an attacker must possess
User Interaction
Required (R)
Captures the requirement for a human user participation
Scope
Unchanged (U)
Determines if a successful attack impacts components beyond the vulnerable component
Confidentiality Impact
High (H)
Measures the impact to the confidentiality of information
Integrity Impact
None (N)
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
None (N)
Measures the impact to the availability of the impacted component
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
Medium
Describes the conditions beyond the attacker's control
Authentication
None (N)
Describes the level of privileges an attacker must possess
Confidentiality Impact
Partial
Measures the impact to the confidentiality of information
Integrity Impact
None (N)
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
None (N)
Measures the impact to the availability of the impacted component
Description
A flaw was found in keycloak in versions prior to 13.0.0. The client registration endpoint allows fetching information about PUBLIC clients (like client secret) without authentication which could be an issue if the same PUBLIC client changed to CONFIDENTIAL later. The highest threat from this vulnerability is to data confidentiality.
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Sources
CWEs
Exploits
Exploit ID: CVE-2020-27838
Source: github-poc
Vulnerable Software (3)
Type: Configuration
Product: keycloak
Operating System: debian
{ "unfixed": true}
Source: debian
Type: Configuration
Vendor: redhat
Product: keycloak
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*", "versionEndExcluding": "13.0.0", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:redhat...
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*", "versionEndExcluding": "13.0.0", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*", "vulnerable": true } ], "operator": "OR"}
Source: nvd
Type: Configuration
Vendor: redhat
Product: single_sign-on
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*", "versionEndExcluding": "13.0.0", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:redhat...
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*", "versionEndExcluding": "13.0.0", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*", "vulnerable": true } ], "operator": "OR"}
Source: nvd