Package: pure-ftpd Version: 1.0.36-1.1 Severity: normal Dear Maintainer,
During a security incident with a compromised FTP account I needed to lookup the IP address inside the /var/log/messages log file. Issue: When the foreign host has set bad DNS entries, for example $ORIGIN 2.0.192.in-addr.arpa. 45 IN PTR customer.example.net. 46 IN PTR customer.example.net. 47 IN PTR customer.example.net. $ORIGIN example.net. ; there is no "customer IN A" record then I get a log entry like Dec 19 10:13:06 kundwebs pure-ftpd: (?@customer.example.net) [WARNING] Authentication failed for user [user001] instead Dec 19 10:13:06 kundwebs pure-ftpd: (?@192.0.2.45) [WARNING] Authentication failed for user [user001] Needed fix: pure-ftpd always must also resolve the host name received from the PTR record in forward direction to ensure that it is not a bogus hostname, i.e. they must be identical. In all cases of wrong DNS configuration, pure-ftpd always must show the naked IP address even if DontResolv=no is set. Workaround by myself: DNS resolution disabled, i.e. echo yes >/etc/pure-ftpd/conf/DontResolve To the Debian package maintainers: I recommend to set this behaviour as the package default. -- System Information: Debian Release: 7.2 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable') Architecture: i386 (i686) Kernel: Linux 3.2.0-4-686-pae (SMP w/1 CPU core) Locale: LANG=de_CH.UTF-8, LC_CTYPE=de_CH.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages pure-ftpd depends on: ii libc6 2.13-38 ii libcap2 1:2.22-1.2 ii libpam0g 1.1.3-7.1 ii libssl1.0.0 1.0.1e-2 ii lsb-base 4.1+Debian8+deb7u1 ii openbsd-inetd [inet-superserver] 0.20091229-2 ii pure-ftpd-common 1.0.36-1.1 pure-ftpd recommends no packages. pure-ftpd suggests no packages. -- no debconf information -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
