Package: atftpd
Version: 0.7.git20120829-1
Severity: normal
Tags: lfs
Dear Maintainer,
Attempting to transfer a binary file with a length of 47462048 bytes causes
atftpd to send an ICMP port unreachable to the client.
The server is run out of inetd:
tftp-server$ head -1 /etc/default/atftpd
USE_INETD=true
tftp-server$ grep tftp /etc/inetd.conf
tftpdgram udp4waitnobody /usr/sbin/tcpd
/usr/sbin/in.tftpd --tftpd-timeout 300 --retry-timeout 5 --maxthread 100
--verbose=5 /tftpboot
We have attempted to transfer a binary file from a Cisco router to atftpd
via a directly-connected network segment. A tcpdump on the segment monitoring
the transfer shows a port unreachable sent from the server (192.168.253.21):
15:19:59.411461 IP 192.168.253.21.44863 > 192.168.253.3.53337: UDP, length 4
15:19:59.412806 IP 192.168.253.3.53337 > 192.168.253.21.44863: UDP, length 516
15:19:59.412899 IP 192.168.253.21.44863 > 192.168.253.3.53337: UDP, length 4
15:19:59.414381 IP 192.168.253.3.53337 > 192.168.253.21.44863: UDP, length 516
15:19:59.414624 IP 192.168.253.21.44863 > 192.168.253.3.53337: UDP, length 37
15:19:59.417361 IP 192.168.253.3.53337 > 192.168.253.21.44863: UDP, length 4
15:19:59.417448 IP 192.168.253.21 > 192.168.253.3: ICMP 192.168.253.21 udp port
44863 unreachable, length 40
15:20:02.414195 IP 192.168.253.3.53337 > 192.168.253.21.44863: UDP, length 4
15:20:02.414269 IP 192.168.253.21 > 192.168.253.3: ICMP 192.168.253.21 udp port
44863 unreachable, length 40
15:20:06.413873 IP 192.168.253.3.53337 > 192.168.253.21.44863: UDP, length 4
15:20:06.413949 IP 192.168.253.21 > 192.168.253.3: ICMP 192.168.253.21 udp port
44863 unreachable, length 40
15:20:11.413464 IP 192.168.253.3.53337 > 192.168.253.21.44863: UDP, length 4
15:20:11.413537 IP 192.168.253.21 > 192.168.253.3: ICMP 192.168.253.21 udp port
44863 unreachable, length 40
15:20:17.412970 IP 192.168.253.3.53337 > 192.168.253.21.44863: UDP, length 4
15:20:17.413037 IP 192.168.253.21 > 192.168.253.3: ICMP 192.168.253.21 udp port
44863 unreachable, length 40
The following log entries were written to /var/log/daemon.log
Dec 21 15:18:00 tftp-server in.tftpd[16688]: connect from 192.168.253.3
(192.168.253.3)
Dec 21 15:18:00 tftp-server atftpd[16688]: Advanced Trivial FTP server started
(0.7)
Dec 21 15:18:00 tftp-server atftpd[16688]: Fetching from 192.168.253.3 to
c1841-adventerprisek9-mz.151-4.M9.bin
Dec 21 15:19:59 tftp-server atftpd[16688]: tftpd_file.c: 361: error writing to
file /tftpboot/c1841-adventerprisek9-mz.151-4.M9.bin
Dec 21 15:23:00 tftp-server atftpd[16688]: atftpd terminating after 300 seconds
Dec 21 15:23:00 tftp-server atftpd[16688]: Main thread exiting
The end result was 33553920 bytes were transfered before the transfer failed:
tftp-server$ ls -l /tftpboot/c1841-adventerprisek9-mz.151-4.M9.bin
-rw-r--r-- 1 nobody nogroup 33553920 Dec 21 15:19
/tftpboot/c1841-adventerprisek9-mz.151-4.M9.bin
-- System Information:
Distributor ID: Raspbian
Description:Raspbian GNU/Linux 8.0 (jessie)
Release:8.0
Codename: jessie
Architecture: armv7l
Kernel: Linux 4.4.34-v7+ (SMP w/4 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages atftpd depends on:
ii debconf [debconf-2.0] 1.5.56
ii libc6 2.19-18+deb8u6
ii libpcre3 2:8.35-3.3+deb8u4
ii libwrap0 7.6.q-25
ii lsb-base 4.1+Debian13+rpi1+nmu1
ii update-inetd 4.43
Versions of packages atftpd recommends:
ii openbsd-inetd [inet-superserver] 0.20140418-2
Versions of packages atftpd suggests:
ii logrotate 3.8.7-1
-- debconf information:
atftpd/tsize: true
atftpd/tftpd-timeout: 300
atftpd/timeout: true
atftpd/basedir: /tftpboot
atftpd/port: 69
atftpd/blksize: true
atftpd/maxthread: 100
atftpd/verbosity: 5 (LOG_NOTICE)
atftpd/logtofile: false
atftpd/retry-timeout: 5
atftpd/ttl: 1
atftpd/logfile: /var/log/atftpd.log
atftpd/mcast_addr: 239.239.239.0-255
atftpd/multicast: true
atftpd/use_inetd: true
atftpd/mcast_port: 1758
