mainfile.php in XOOPS 184.108.40.206 and earlier, when register_globals is enabled, allows remote attackers to overwrite variables such as $xoopsOption['nocommon'] and conduct directory traversal attacks or include PHP files via (1) xoopsConfig[language] to misc.php or (2) xoopsConfig[theme_set] to index.php, as demonstrated by injecting PHP sequences into a log file.
CVSS Severity (version 2.0):
Impact Subscore: 6.4
Exploitability Subscore: 4.9
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: High
Authentication: Not required to exploit
Impact Type: Provides unauthorized access, Allows partial confidentiality, integrity, and availability violation; Allows unauthorized disclosure of information; Allows disruption of service
Successful exploitation requires that "register_globals" is enabled, and that "magic_quotes_gpc" is disabled.
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20060521 XOOPS <= 220.127.116.11 'xoopsOption[nocommon]' exploit