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cmd/fshim: set no_new_privs flag 

Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
This commit is contained in:
Ophestra Umiker 2024-11-09 11:50:56 +09:00
parent 431aa32291
commit 45fead18c3
Signed by: cat
SSH Key Fingerprint: SHA256:gQ67O0enBZ7UdZypgtspB2FDM1g3GVw8nX0XSdcFw8Q
1 changed files with 5 additions and 0 deletions
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5
cmd/fsu/main.go
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@ -15,6 +15,8 @@ const (
fsuConfFile = "/etc/fsurc"
envShim = "FORTIFY_SHIM"
envAID = "FORTIFY_APP_ID"
PR_SET_NO_NEW_PRIVS = 0x26
)
var Fmain = compPoison
@ -86,6 +88,9 @@ func main() {
if err := syscall.Setresuid(uid, uid, uid); err != nil {
log.Fatalf("cannot set uid: %v", err)
}
if _, _, errno := syscall.AllThreadsSyscall(syscall.SYS_PRCTL, PR_SET_NO_NEW_PRIVS, 1, 0); errno != 0 {
log.Fatalf("cannot set no_new_privs flag: %s", errno.Error())
}
if err := syscall.Exec(fmain, []string{"fortify", "shim"}, []string{envShim + "=" + shimSetupPath}); err != nil {
log.Fatalf("cannot start shim: %v", err)
}