what you don't know can hurt you
Home Files News &[SERVICES_TAB]About Contact Add New

remote_bof_cfingerd.txt

remote_bof_cfingerd.txt
Posted Sep 21, 1999

Remote buffer overflow in cfingerd 1.3.2

tags | exploit, remote, overflow
SHA-256 | f453430c34ffe6e9dc571d498c52f917c4d87fd65d60b9b5b36a1063a0b193a1

remote_bof_cfingerd.txt

Change Mirror Download
Subject:      cfingerd 1.3.2
To: BUGTRAQ@netspace.org


Hi,


there is a remote buffer over flow in cfingerd 1.3.2
in search_fake():


int search_fake(char *username)
{
char parsed[80];


bzero(parsed, 80);
sscanf(username, "%[^.].%*[^\r\n]\r\n", parsed);
...



called from process_username(), that is called from main:


int main(int argc, char *argv[])
{
char username[100], syslog_str[200];
...


if (!emulated) {
if (!fgets(username, sizeof(username), stdin)) {


...
/* Check the finger information coming in and return its type */
un_type = process_username(username);



see parsed[80] and username[100].
Anyway search_illegal() is called before than search_fake()
so only [A-z0-9] and many other char can be used in oreder to
execute arbitrary code.


Debian is not vulnerable because a patch fix this and other
cfingerd weakness (i think it's an example of bad coding)
but searching in bugtraq archive i haven't found anything.


I take opportunity to inform that i'm developing a
secure (i hope) finger daemon: mayfingerd. In order to
make mayfingerd more portable i need some unprivileged
account in hosts running *BSD, Solaris, AIX etc. Bugtraq
readers can help me?


I hope it will be released together with hping2 the
next month.


Sorry for my bad english forever :)


have a good summer,
antirez


--
Salvatore Sanfilippo antirez | md5330@mclink.it | antirez@alicom.com
try hping: http://www.kyuzz.org/antirez antirez@seclab.com
Login or Register to add favorites

File Archive:

November 2024

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Nov 1st
    30 Files
  • 2
    Nov 2nd
    0 Files
  • 3
    Nov 3rd
    0 Files
  • 4
    Nov 4th
    12 Files
  • 5
    Nov 5th
    0 Files
  • 6
    Nov 6th
    0 Files
  • 7
    Nov 7th
    0 Files
  • 8
    Nov 8th
    0 Files
  • 9
    Nov 9th
    0 Files
  • 10
    Nov 10th
    0 Files
  • 11
    Nov 11th
    0 Files
  • 12
    Nov 12th
    0 Files
  • 13
    Nov 13th
    0 Files
  • 14
    Nov 14th
    0 Files
  • 15
    Nov 15th
    0 Files
  • 16
    Nov 16th
    0 Files
  • 17
    Nov 17th
    0 Files
  • 18
    Nov 18th
    0 Files
  • 19
    Nov 19th
    0 Files
  • 20
    Nov 20th
    0 Files
  • 21
    Nov 21st
    0 Files
  • 22
    Nov 22nd
    0 Files
  • 23
    Nov 23rd
    0 Files
  • 24
    Nov 24th
    0 Files
  • 25
    Nov 25th
    0 Files
  • 26
    Nov 26th
    0 Files
  • 27
    Nov 27th
    0 Files
  • 28
    Nov 28th
    0 Files
  • 29
    Nov 29th
    0 Files
  • 30
    Nov 30th
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2024 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close