https://www.exploit-db.com/exploits/19912
http://www.cnnvd.org.cn/web/xxk/ldxqById.tag?CNNVD=CNNVD-200005-040

Netscape4.73和早期版本的符号链接在导入新蛋证书时存在漏洞，本地用户可以利用这个漏洞将自身的证书导入覆盖原有文件。

source: http://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.

来源:BID
名称:1201
链接:http://www.securityfocus.com/bid/1201
来源:BUGTRAQ
名称:20000510PossiblesymlinkproblemswithNetscape4.73
链接:http://archives.neohapsis.com/archives/bugtraq/2000-05/0126.html