Package: netcat-openbsd
Version: 1.195-1
Followup-For: Bug #747646
Performing this test with blank packets still works without the server seeing
anything.
-- System Information:
Debian Release: buster/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.18.0-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages netcat-openbsd depends on:
ii libbsd0 0.9.1-1
ii libc6 2.27-8
netcat-openbsd recommends no packages.
netcat-openbsd suggests no packages.
-- no debconf information
--- ../netcat-openbsd-1.195/netcat.c 2018-11-09 12:15:42.000000000 -0500
+++ netcat.c 2018-11-08 23:07:38.858140209 -0500
@@ -1862,15 +1862,15 @@
{
int i, t;
- if ((write(s, "X", 1) != 1) ||
- ((write(s, "X", 1) != 1) && (errno == ECONNREFUSED)))
+ if ((write(s, "", 1) != 1) ||
+ ((write(s, "", 1) != 1) && (errno == ECONNREFUSED)))
return -1;
/* Give the remote host some time to reply. */
for (i = 0, t = (timeout == -1) ? UDP_SCAN_TIMEOUT : (timeout / 1000);
i < t; i++) {
sleep(1);
- if ((write(s, "X", 1) != 1) && (errno == ECONNREFUSED))
+ if ((write(s, "", 1) != 1) && (errno == ECONNREFUSED))
return -1;
}
return 1;
