providers/saml2/admin.py in the Identity Provider (IdP) server in Ipsilon 0.1.0 before 1.0.1 does not properly check permissions to update the SAML2 Service Provider (SP) owner, which allows remote authenticated users to cause a denial of service via a duplicate SP name.

References

• https://nvd.nist.gov/vuln/detail/CVE-2015-5217
• https://bugzilla.redhat.com/show_bug.cgi?id=1255172
• https://fedorahosted.org/ipsilon/wiki/Releases/v1.0.1
• https://pagure.io/ipsilon/826e6339441546f596320f3d73304ab5f7c10de6
• http://www.openwall.com/lists/oss-security/2015/10/27/8
• https://github.com/pypa/advisory-database/tree/main/vulns/ipsilon/PYSEC-2015-41.yaml