TippingPoint Zero Day Initiative
 

Verity Ultraseek Request Proxying Vulnerability

ZDI-06-042: November 15th, 2006

CVE ID

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 4287. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to proxy web attacks and scan internal hosts through vulnerable installations of Verity Ultraseek. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the highlight script used to highlight search terms on spidered pages. An attacker can directly access the highlight script at '/highlight/index.html' to pass parameters to and retrieve content from arbitrary URLs. The same script can also be abused to enumerate otherwise inaccessible internal addresses and open ports.

Ultraseek also exposes various information disclosure vulnerabilities through the following scripts:

/help/urlstatusgo.html
/help/header.html
/help/footer.html
/spell.html
/coreforma.html
/daterange.html
/hits.html
/hitsnavbottom.html
/indexform.html
/indexforma.html
/languages.html
/nohits.html
/onehit1.html
/onehit2.html
/query.html
/queryform0.html
/queryform0a.html
/queryform1.html
/queryform1a.html
/queryform2.html
/queryform2a.html
/quicklinks.html
/relatedtopics.html
/signin.html
/subtopics.html
/thesaurus.html
/topics.html
/hitspagebar.html
/highlight/highlight.html
/highlight/highlight_one.html
/highlight/topnav.html

Authenticated Ultraseek users can further abuse another vulnerability to retrieve arbitrary file contents from the underyling server through the '/admin/logfile.txt' script.

Vendor Response

Verity has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2006-05-09 - Vulnerability reported to vendor
    2006-11-15 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    sullo / CIRT.net