[packbackbooks/lti-1-3-php-library] LTI 1.3 Tool Library’s function used to generate random nonces not sufficiently cryptographically complex before v5.0

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

• https://github.com/packbackbooks/lti-1-3-php-library/security/advisories/GHSA-768m-5w34-2xf5
• https://github.com/packbackbooks/lti-1-3-php-library/commit/de19e8a0b28cdc7750fa3ca98471eeed26ba3e57
• https://openid.net/specs/openid-connect-core-1_0.html#IDToken
• https://nvd.nist.gov/vuln/detail/CVE-2022-31157
• https://github.com/advisories/GHSA-768m-5w34-2xf5