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eScan Products Agent Service Missing User Authentication
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Secunia Advisory:
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SA23809
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Release Date:
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2007-05-02
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Last Update:
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2007-05-21
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Popularity:
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4,881 views
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Critical:
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Less critical
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Impact:
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Security Bypass
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Where:
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From local network
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Solution Status:
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Unpatched
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| Software: | eScan 8.x
eScan for Vista 9.x
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Subscribe:
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Instant alerts on relevant vulnerabilities 
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| | CVE reference: | CVE-2007-0655
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Description:
Secunia Research has discovered a security issue in various eScan products, which can be exploited by malicious, local users to gain escalated privileges or by malicious people to manipulate certain settings or gain knowledge of sensitive information.
The MicroWorld Agent service (MWAGENT.EXE) runs with SYSTEM privileges and accepts connections from anywhere without implementing an authentication scheme. This allows anyone to send arbitrary commands to the service (default port 2222/tcp) allowing the following:
1) An unprivileged, local user can gain SYSTEM privileges by sending a SCASYS, SCADRV, or SCAMEM command, which invokes the Anti-Virus scanner in a window with SYSTEM privileges. Through this, it is possible to execute any command with the privileges of the scanner via e.g. the "View Log" functionality.
2) It is possible to disable/enable the eScan Anti-Virus Monitor process via the DISMON and ENAMON commands.
3) An unprivileged, local user can uninstall the product via the UNISOFT command and clicking "Yes" on a window that pops up on the user's desktop.
4) It is possible to disclose the contents of arbitrary files on the system via the SEND command.
5) It is possible to enable/disable the "Restrictive Scanning" configuration setting via the SLOMOD ("High Security (Slow Mode)") and FASMOD ("Medium Security (Fast Mode)") commands.
6) It is possible to enable/disable the eScan "File Rights" configuration setting via the ENFRIG and DIFRIG commands.
7) It is possible to change the server status via the STASER and STOSER commands.
8) It is possible to configure the update server via the UPDSET command.
The security issue is confirmed in versions 8.0.671.1, 9.0.714.1, 9.0.715.1, and 9.0.718.1. Other versions may also be affected.
Solution:
A stable version should be available shortly.
NOTE: The previously released versions (9.0.714.1, 9.0.715.1, and 9.0.718.1) supposedly fixing the security issue are still affected. Version 9.0.715.1 has implemented a command obfuscation scheme and therefore requires specially obfuscated commands sent to the service. Version 9.0.718.1 has implemented a weak authentication scheme, which needs to be brute forced.
Provided and/or discovered by:
Carsten Eiram, Secunia Research.
Changelog:
2007-05-02: Added version 9.x as affected. Updated "Solution" section.
2007-05-10: Added information about version 9.0.715.1 being affected.
2007-05-21: Added information about version 9.0.718.1 being affected.
Original Advisory:
Secunia Research:
http://secunia.com/secunia_research/2007-45/
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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