diff -ur openssh-3.6.1p1.orig/ssh-agent.c openssh-3.6.1p1/ssh-agent.c
--- openssh-3.6.1p1.orig/ssh-agent.c	Sat Mar 15 00:37:09 2003
+++ openssh-3.6.1p1/ssh-agent.c	Mon Apr  7 22:10:45 2003
@@ -40,6 +40,10 @@
 #include <openssl/evp.h>
 #include <openssl/md5.h>
 
+#ifdef __linux__
+#include <sys/prctl.h>
+#endif
+
 #include "ssh.h"
 #include "rsa.h"
 #include "buffer.h"
@@ -1004,6 +1008,18 @@
 	/* drop */
 	setegid(getgid());
 	setgid(getgid());
+
+#ifdef __linux__
+/*
+ * Protect this process even if it's not installed SGID (Linux 2.4+ only,
+ * but we also want to compile this in with older Linux kernel headers in
+ * case the binary is actually run with a 2.4+ kernel).
+ */
+#ifndef PR_SET_DUMPABLE
+#define PR_SET_DUMPABLE 4
+#endif
+	prctl(PR_SET_DUMPABLE, 0);
+#endif
 
 	SSLeay_add_all_algorithms();