Ruby missing "taintness" checks in dl module

2008-08-0720:00:00

RubySec

rubysec.com

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

JSON

The dl module in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7
through 1.8.7-p71, and 1.9 through r18423 does not check “taintness” of
inputs, which allows context-dependent attackers to bypass safe levels and
execute dangerous functions by accessing a library using DL.dlopen.