[pysaml2] Moderate severity vulnerability that affects pysaml2

Python package pysaml2 version 4.5.0 and earlier reuses the initialization vector across encryptions in the IDP server, resulting in weak encryption of data.

References

• https://nvd.nist.gov/vuln/detail/CVE-2017-1000246
• https://github.com/rohe/pysaml2/issues/417
• https://github.com/advisories/GHSA-cq94-qf6q-mf2h
• https://github.com/IdentityPython/pysaml2/pull/519/commits/7323f5c20efb59424d853c822e7a26d1aa3e84aa