Overview
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Certain Lexmark devices are vulnerable to unverified password changes and stored cross-site scripting attacks.

Description:
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Unverified Password Change – CVE-2013-6032
Certain models of Lexmark laser printers and MarkNet devices are vulnerable to an attack which allows a remote unauthenticated attacker to change the administrative password of the printer’s web administration interface. The interface does not perform sufficient validation of the vac.255.GENPASSWORD parameter in POST requests to the /cgi-bin/postpf/cgi-bin/dynamic/config/config.html page, allowing an unauthenticated remote attacker to reset the administrative password to an empty string.

Improper Neutralization of Input During Web Page Generation (‘Cross-site Scripting’) – CVE-2013-6033
Certain models of Lexmark laser printers are vulnerable to stored cross-site scripting attacks. The printers’ administrative web interface does not perform sufficient validation of user input to the “Location” and “Contact Name” fields in the “General Settings” configuration page.

Impact:
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An attacker may be able to run arbitrary script in the context of a victim’s browser. The attacker may also be able to gain full administrative control of the printer.

Solution:
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Apply an Update

Lexmark advises users to update to the latest firmware version. A list of affected models and firmware versions, as well as accompanying fixes, can be found at Lexmark’s advisory page.
Vendor Information: http://support.lexmark.com/alerts/

CVSS Metrics:
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Group Score Vector
Base 9.0 AV:N/AC:L/Au:N/C:P/I:P/A:C
Temporal 7.4 E:F/RL:OF/RC:C
Environmental 1.9 CDP:N/TD:L/CR:ND/IR:ND/AR:ND

Vendor Date Notified: 16 Oct 2013