After dropping and then elevating process privileges euid, guid, and groups are not properly restored to their original values, allowing an unprivileged user to gain membership in the root group.
{
"review_status": "REVIEWED",
"url": "https://pkg.go.dev/vuln/GO-2020-0027"
}{
"imports": [
{
"path": "github.com/google/fscrypt/pam",
"symbols": [
"Handle.StartAsPamUser",
"Handle.StopAsPamUser",
"NewHandle"
]
},
{
"path": "github.com/google/fscrypt/security",
"symbols": [
"FindKey",
"InsertKey",
"RemoveKey",
"SetProcessPrivileges",
"UserKeyringID",
"setGids",
"setGroups",
"setUids"
]
}
]
}