Matrix Synapse before 0.34.0.1, when the macaroonsecretkey authentication parameter is not set, uses a predictable value to derive a secret key and other secrets which could allow remote attackers to impersonate users.
{
"unresolved_ranges": [
{
"cpe": "cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*",
"source": "CPE_FIELD",
"extracted_events": [
{
"last_affected": "28"
}
]
},
{
"cpe": "cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*",
"source": "CPE_FIELD",
"extracted_events": [
{
"last_affected": "29"
}
]
}
]
}{
"cpe": "cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*",
"source": "CPE_FIELD",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "0.34.0.1"
}
]
}