Perl 5.x – ‘lc()’ / ‘uc()’ TAINT Mode Protection Security Bypass

Exploit Database
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作者： mmartinec

日期： 2011-03-30
类别：
- remote
平台：
- linux
来源：https://www.exploit-db.com/exploits/35554/

source: https://www.securityfocus.com/bid/47124/info

Perl is prone to a security-bypass weakness that occurs when laundering tainted input.

Attackers can leverage this issue to bypass security checks in perl applications that rely on TAINT mode protection functionality. This opens such applications up to potential attacks that take advantage of the software's failure to properly sanitize user-supplied input.

The following example input is available:

> perl -Te 'use Scalar::Util qw(tainted); $t=$0; $u=lc($t); printf("%d,%d\n",tainted($t),tainted($u))'

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