GnuPG 2.2.4 and 2.2.5 does not enforce a configuration in which key certification requires an offline master Certify key, which results in apparently valid certifications that occurred only with access to a signing subkey.
[
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "2.2.4"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "2.2.5"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "14.04"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "16.04"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "17.10"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "18.04"
}
]
}
]
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-9234.json"