It was found that Keycloak's SAML broker, versions up to 6.0.1, did not verify missing message signatures. If an attacker modifies the SAML Response and removes the <Signature> sections, the message is still accepted, and the message can be modified. An attacker could use this flaw to impersonate other users and gain access to sensitive information.
{
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*",
"cpe:2.3:a:redhat:single_sign-on:7.3.3:*:*:*:*:*:*:*"
],
"extracted_events": [
{
"introduced": "7.0"
},
{
"last_affected": "7.0"
},
{
"introduced": "7.3.3"
},
{
"last_affected": "7.3.3"
}
],
"vendor_product": "redhat:single_sign-on",
"source": "CPE_STRING"
}
]
}{
"cpe": "cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*",
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "6.0.1"
}
],
"source": "CPE_RANGE"
}