Microsoft Internet Explorer setRequestHeader chunk security bypass
| ie-setrequestheader-chunk-security-bypass (42804) |  Medium Risk |
Description:
Microsoft Internet Explorer could allow a remote attacker to bypass security restrictions, caused by a failure in the setRequestHeader method of the XMLHttpRequest object method to prevent Transfer-Encoding HTTP header requests. By sending a specially-crafted HTTP POST request containing a "Transfer-Encoding: chunked" header and a request body with an incorrect chunk size, an attacker could exploit this vulnerability to conduct HTTP request splitting and smuggling attacks.
Platforms Affected:
- Microsoft, Internet Explorer 7.0.5730.11
Remedy:
Refer to Microsoft Security Bulletin MS08-031 for patch, upgrade or suggested workaround information. See References.
Consequences:
Bypass Security
References:
- Microsoft Internet Explorer Web site, Internet Explorer: Home Page at http://www.microsoft.com/windows/products/winfamily/ie/default.mspx.
- Microsoft Web site, Microsoft Security Bulletin MS08-031 at http://www.microsoft.com/technet/security/bulletin/ms08-031.mspx.
- Minded Security Labs: Advisory #MSA01240108, Microsoft Internet Explorer "Transfer-Encoding: chunked" allows Request Splitting/Smuggling at http://www.mindedsecurity.com/MSA01240108.html.
- BID-28379: Microsoft Internet Explorer 'setRequestHeader()' Multiple Vulnerabilities
- CVE-2008-1545: The setRequestHeader method of the XMLHttpRequest object in Microsoft Internet Explorer 7 does not restrict the dangerous Transfer-Encoding HTTP request header, which allows remote attackers to conduct HTTP request splitting and HTTP request smuggling attacks via a POST containing a Transfer-Encoding: chunked header and a request body with an incorrect chunk size.
- FrSIRT/ADV-2008-0980: Microsoft Internet Explorer Request Splitting and Smuggling Vulnerabilities
- SA29453: Internet Explorer HTTP Request Smuggling/Splitting Vulnerabilities
Reported:
Mar 21, 2008
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