8225 : Multiple Shell PS1 Variable Arbitrary Command Execution
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
2	232	over 7 years ago	over 2 years ago	1 times	90%

Timeline

Disclosure Date
1999-04-20

Description

Bash shell contains a flaw that may allow a malicious user to run arbitrary commands embedded in the path to the current working directory. The issue is triggered when (PS1) contains '\w' or '\W', and the prompt is displayed the commands will be executed. It is possible that the flaw may allow malicious command execution resulting in a loss of integrity.

Classification

Location: Local Access Required
Attack Type: Input Manipulation
Impact: Loss of Integrity
Solution: Upgrade
Exploit: Exploit Public

Solution

Upgrade to version 2.x or higher, as it has been reported to fix this vulnerability. It is also possible to correct the flaw by implementing the following workaround(s): replace '\w' with '$PWD', and '\W' with '${PWD##*/}'.

Products

GNU

bash

1.14

References

Bugtraq ID: 119
CVE ID: 1999-0491 (see also: NVD) 1999-1383 (see also: NVD)
ISS X-Force ID: 3531
Other Advisory URL: ftp://ftp.calderasystems.com/pub/OpenLinux/security/CSSA-1999-008.0.txt http://www.dataguard.no/bugtraq/1996_3/0503.html
http://www.securityfocus.com/templates/archive.pike?list=1&msg=Pine.LNX.4.10.9904202114070.6623-100000@smooth.Operator.org
Mail List Post: http://marc.theaimsgroup.com/?l=bugtraq&m=87602167419868&w=2
http://seclists.org/lists/bugtraq/1999/Apr/0217.html

Manual Testing Notes

Credit

Shadow - shadowOperator.org -

CVSSv2 Score

CVSSv2 Base Score = 4.6
Source: nvd.nist.gov | Generated: 2003-12-31 | Disagree? | There are 1 more: View All

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