openssh/openssh-9.4p2-limit-delay.patch
2023-10-23 13:33:49 +02:00

34 lines
1.1 KiB
Diff

diff -u -p -r1.166 auth2.c
--- a/auth2.c 8 Mar 2023 04:43:12 -0000 1.166
+++ b/auth2.c 28 Aug 2023 08:32:44 -0000
@@ -208,6 +208,7 @@ input_service_request(int type, u_int32_
}
#define MIN_FAIL_DELAY_SECONDS 0.005
+#define MAX_FAIL_DELAY_SECONDS 5.0
static double
user_specific_delay(const char *user)
{
@@ -233,6 +234,12 @@ ensure_minimum_time_since(double start,
struct timespec ts;
double elapsed = monotime_double() - start, req = seconds, remain;
+ if (elapsed > MAX_FAIL_DELAY_SECONDS) {
+ debug3_f("elapsed %0.3lfms exceeded the max delay "
+ "requested %0.3lfms)", elapsed*1000, req*1000);
+ return;
+ }
+
/* if we've already passed the requested time, scale up */
while ((remain = seconds - elapsed) < 0.0)
seconds *= 2;
@@ -317,7 +324,7 @@ input_userauth_request(int type, u_int32
debug2("input_userauth_request: try method %s", method);
authenticated = m->userauth(ssh);
}
- if (!authctxt->authenticated)
+ if (!authctxt->authenticated && strcmp(method, "none") != 0)
ensure_minimum_time_since(tstart,
user_specific_delay(authctxt->user));
userauth_finish(ssh, authenticated, method, NULL);