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LTI 1.3 Tool Library's function used to generate random nonces not sufficiently cryptographically complex before v5.0

High severity GitHub Reviewed Published Jul 15, 2022 in packbackbooks/lti-1-3-php-library • Updated Jul 24, 2023

Package

composer packbackbooks/lti-1-3-php-library (Composer)

Affected versions

< 5.0

Patched versions

5.0

Description

Impact

The function used to generate random nonces was not sufficiently cryptographically complex. As a result values may be predictable and tokens may be forgable.

Patches

Users should upgrade to version 5.0 immediately

Workarounds

None.

References

@dbhynds dbhynds published to packbackbooks/lti-1-3-php-library Jul 15, 2022
Published by the National Vulnerability Database Jul 15, 2022
Published to the GitHub Advisory Database Jul 15, 2022
Reviewed Jul 15, 2022
Last updated Jul 24, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS score

0.073%
(33rd percentile)

Weaknesses

CVE ID

CVE-2022-31157

GHSA ID

GHSA-768m-5w34-2xf5

Source code

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