Exploit Netscape Communicator 4.5/4.51/4.6/4.61/4.7/4.72/4.73 - '/tmp' Symlink

Exploiter

Хакер
34,644
0
18 Дек 2022
EDB-ID
19912
Проверка EDB
  1. Пройдено
Автор
FOO
Тип уязвимости
LOCAL
Платформа
MULTIPLE
CVE
cve-2000-0409
Дата публикации
2000-05-10
Netscape Communicator 4.5/4.51/4.6/4.61/4.7/4.72/4.73 - '/tmp' Symlink
Код:
source: https://www.securityfocus.com/bid/1201/info

Netscape Communicator version 4.73 and prior may be susceptible to a /tmp file race condition when importing certificates. Netscape creates a /tmp file which is world readable and writable in /tmp, without calling stat() or fstat() on the file. As such, it is possible, should a user be able to predict the file name, to cause a symbolic link to be created, and followed elsewhere on the file system. 

Additionally, as the file is created mode 666 prior to being fchmod()'d to 600, there may be a window of opportunity for altering the contents of this file.

This issue has only been demonstrated on the Linux binary, for glibc. The sparc Solaris binary does not behave this way.

Predict the name of the temporary file.
ln -sf /elsewhere /tmp/<tmpfilename>

Alternately, a program which watches for the creation of these temporary files, opens them upon their creation, and alters the contents can be written.
 
Источник
www.exploit-db.com

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