JVN#05187780 Hiki arbitrary file deletion vulnerability

Overview

Hiki, a Wiki clone software developed by Hiki Development Team, contains a vulnerability that may allow a remote attacker to delete arbitrary files.

Products Affected

Hiki 0.8.0 - 0.8.6

Description

Hiki contains a vulnerability that allows an arbitrary file to be deleted on a server running Hiki. This is caused by the improper handling of a session management file.

Impact

A remote attacker may be able to delete arbitrary files with the privilege of the user running Hiki.

Solution

Upgrade the software
The developer has released Hiki 0.8.7 which contains the fix for this vulnerability. We recommend that affected users upgrade their software to the fixed version.

Vendor Status

Vendor	Link
HikiWiki	http://hikiwiki.org/ja/advisory20070624.html
	http://hikiwiki.org/ja/download.html

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2007.06.25

Measures	Conditions	Severity
Access Required	Routed - can be attacked over the Internet using packets	High
Authentication	None - anonymous or no authentication (IP addresses do not count)	High
User Interaction Required	None - the vulnerability can be exploited without an honest user taking any action	High
Exploit Complexity	Low-Medium - some expertise and/or luck required (most buffer overflows, guessing correctly in small space, expertise in Windows function calls)	Medium-High

Description of each analysis measures

Credit

Kazuhiro Nishiyama reported this vulnerability to IPA.
JPCERT/CC coordinated with the vendors under Information Security Early Warning Partnership.

Other Information

JPCERT Alert
JPCERT Reports
CERT Advisory
CPNI Advisory
TRnotes
CVE
JVN iPedia	JVNDB-2007-000476