Full Disclosure mailing list archives
Re: iDefense COMRaider 'DeleteFile()' Method Arbitrary File Deletion Vulnerability
From: Jeremy Brown <0xjbrown41 () gmail com>
Date: Wed, 4 Mar 2009 17:27:05 -0500
That is actually decently accurate. Only thing is that these controls should always (unless in a specific environment) have checks that won't allow malicious events to occur. Even if controls aren't marked as safe for automatic loading and execution, massive social engineering can make them work still. Such example would work like so... A remote code execution exploit is found in non-safe popular anti-virus component. Attacker sets up a website called www.freexxxxxantivirusscan.com, convinces user to allow loading/execution of component. Game over. On Wed, Mar 4, 2009 at 4:42 PM, iDefense Labs <labs-no-reply () idefense com> wrote:
Amir, et al, We would not classify this issue as a security vulnerability. The COM object in question is *NOT* loadable in Internet Explorer in a default configuration. CLSID: {9A077D0D-B4A6-4EC0-B6CF-98526DF589E4} ProgId: vbDevKit.CVariantFileSystem Path to binary: C:\WINDOWS\vbDevKit.dll Doesn't implement IObjectSafety Registry settings: Registry: is not safe for initialization Registry: is not safe for scripting Killbit is NOT set In order to load this control, the particular security setting that would need to be modified is "Initialize and script ActiveX controls not marked as safe for scripting". Changing this particular setting to "Enable", or even "Prompt", significantly impacts the browser's overall security posture. In short, if your machine allows this control to be loaded, then your browser will load controls regardless of safety designations such as "Safe for Scripting", "Safe for Initialization", and "IObjectSaftey". This includes the ability to load controls such as WScript, which can execute arbitrary commands out of the box. iDefense Labs _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
_______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
Current thread:
- Re: iDefense COMRaider 'DeleteFile()' Method Arbitrary File Deletion Vulnerability iDefense Labs (Mar 04)
- Re: iDefense COMRaider 'DeleteFile()' Method Arbitrary File Deletion Vulnerability Jeremy Brown (Mar 04)