CVE-2021-44878
Scores
EPSS
Percentile: 0.0%
CVSS
CVSS Score: 7.5/10
All CVSS Scores
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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
Low (L)
Describes the conditions beyond the attacker's control
Privileges Required
None (N)
Describes the level of privileges an attacker must possess
User Interaction
None (N)
Captures the requirement for a human user participation
Scope
Unchanged (U)
Determines if a successful attack impacts components beyond the vulnerable component
Confidentiality Impact
None (N)
Measures the impact to the confidentiality of information
Integrity Impact
High (H)
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:L/Au:N/C:N/I:P/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
Low (L)
Describes the conditions beyond the attacker's control
Authentication
None (N)
Describes the level of privileges an attacker must possess
Confidentiality Impact
None (N)
Measures the impact to the confidentiality of information
Integrity Impact
Partial
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
If an OpenID Connect provider supports the “none” algorithm (i.e., tokens with no signature), pac4j v5.3.0 (and prior) does not refuse it without an explicit configuration on its side or for the “idtoken” response type which is not secure and violates the OpenID Core Specification. The “none” algorithm does not require any signature verification when validating the ID tokens, which allows the attacker to bypass the token validation by injecting a malformed ID token using “none” as the value of “alg” key in the header with an empty signature value.
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Sources
CWEs
Vulnerable Software (1)
Type: Configuration
Vendor: pac4j
Product: pac4j
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.5.5", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:pac4j:pac4j...
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.5.5", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.3.1", "versionStartIncluding": "5.0.0", "vulnerable": true } ], "operator": "OR"}
Source: nvd