Short Name |
HTTP:STC:IE:URI-INFODISC |
---|---|
Severity |
Medium |
Recommended |
No |
Recommended Action |
Drop |
Category |
HTTP |
Keywords |
Microsoft Internet Explorer URL Encoded Characters Parsing Information Disclosure |
Release Date |
2013/05/07 |
Update Number |
2260 |
Supported Platforms |
idp-4.0+, isg-3.0+, j-series-9.5+, mx-9.4+, srx-9.2+, srx-branch-9.4+, vsrx-12.1+ |
This signature detects attempts to exploit a known vulnerability against Microsoft Internet Explorer. A successful attack can lead to information disclosure. Attackers can exploit this issue to obtain sensitive information that may lead to future attacks.
A vulnerability exists in Microsoft Internet Explorer that can allow for a violation of the same origin policy. When MSIE is evaluating whether access across windows should be permitted, the domain of the parent window is compared to the child. A vulnerability in this process has been reported that is related to the handling of HTTP usernames included in the URL. If the username value is suffixed with "%2f", MSIE will not remove the username when performing the same-origin check. Therefore it is possible to bypass the check if a username is included in a URL that matches the domain of the parent window and is appended with "%2f".