Title: eSafe Gateway Script-filtering Bypass Vulnerability
Severity: MODERATE
Description:
eSafe Gateway is a security utility used for filtering internet content on web-servers.
An html file may be crafted to bypass the script-filtering feature offered by eSafe Gateway. The html filtering mechanism does not properly evaluate markup tags. If a <SCRIPT> command is included inside the brackets of another <SCRIPT> command, then only one of the commands will be extracted by eSafe and the other will slip through. The html generated will still include the 'filtered' script.
Note: There are currently conflicting details regarding this vulnerability. It has been reported that version 3.0 of eSafe Gateway is not vulnerable. The author of the advisory insists that versions 2.x are vulnerable, while the vendor claims that script filtering was not a feature in these versions. Forthcoming updates will be released as more information becomes available.
Affected Products:
- Aladdin Knowledge Systems eSafe Gateway 2.1.0
References:
- Aladdin Knowledge Systems: eSafe product Homepage
- eDvice Security Services: Vulnerability Discovered in Aladdin's eSafe Gateway
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