Full Disclosure mailing list archives
Re: verizon vs m$
From: Ven Ted <v3nt3d () googlemail com>
Date: Mon, 6 Dec 2010 19:27:36 +0000
From the white paper:
Once the initial remote exploit has been used to execute arbitrary code at low integrity on the client, the payload can create a web server listening on any port on the loopback interface, even as a limited user at low integrity. The web server should be able to serve-up the original exploit that allowed remote exploitation in the first instance. Since the exploit will now be launched from the same machine, exploitation can be made significantly more reliable as Address Space Layout Randomisation (ASLR) is no longer effective and other exploitation techniques can be used with higher probabilities of success. The browser can be instructed to navigate to this new malicious web server using the IELaunchUrl() function, which is callable from low integrity as part of the Protected Mode API. This will cause a new tab to be launched which will navigate to "http://localhost/exploit.html" or similar. The new malicious web page will be rendered in the Local Intranet Zone and the rendering process will now be executing at medium integrity. By exploiting the same vulnerability a second time, arbitrary code execution can now be achieved as the same user at medium integrity. This provides full access to the user’s account and allows malware to be persisted on the client, something which was not possible from low integrity whilst in Protected Mode. On Mon, Dec 6, 2010 at 1:49 AM, Thor (Hammer of God) <thor () hammerofgod com>wrote:
I don't understand how Dan arrived at "Researchers bypass Internet Explorer Protected Mode" for the article title. Protected Mode isn't being bypassed at all - the "researchers that figured out a reliable way to bypass the measure" apparently just noticed that Protected Mode is disabled by default in the Local Intranet Zone. Is this something you are concerned about? This would obviously only be exploitable by accessing sites on one's own intranet by specifically using intranet nomenclature (and trusted sites, but the user has to add those). Also, the article (or the researchers) are incorrect about the default settings for the Intranet zone - it's Medium-low, not Medium. If the problem one is trying to fix is based on attackers compromising intranet sites and then posting code for unpatched vulnerabilities that would still end up only running in the user context, then you've got much bigger problems, no? I'm just wondering why you are brining attention to the article, or really, why it was written in the first place. t -----Original Message----- From: full-disclosure-bounces () lists grok org uk [mailto: full-disclosure-bounces () lists grok org uk] On Behalf Of Georgi Guninski Sent: Sunday, December 05, 2010 1:26 PM To: full-disclosure () lists grok org uk Subject: [Full-disclosure] verizon vs m$ in a world like this, verizon kills exploder bugs: http://www.theregister.co.uk/2010/12/03/protected_mode_bypass/ http://www.verizonbusiness.com/resources/whitepapers/wp_escapingmicrosoftprotectedmodeinternetexplorer_en_xg.pdf the language doesn't seem passionate: ----- Finally, Microsoft and other software vendors should clearly document which features do and do not have associated security claims. Clearly stating which features make security claims, and which do not, will allow informed decisions to be made on IT security issues. ----- lol -- joro _______________________________________________ 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/
_______________________________________________ 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:
- verizon vs m$ Georgi Guninski (Dec 05)
- Re: verizon vs m$ Thor (Hammer of God) (Dec 05)
- Re: verizon vs m$ Larry Seltzer (Dec 05)
- Re: verizon vs m$ Georgi Guninski (Dec 06)
- Re: verizon vs m$ Ven Ted (Dec 06)
- Re: verizon vs m$ Thor (Hammer of God) (Dec 06)
- Re: verizon vs m$ John Lightfoot (Dec 06)
- Message not available
- Fwd: verizon vs m$ Ven Ted (Dec 06)
- Re: Fwd: verizon vs m$ Thor (Hammer of God) (Dec 06)
- Re: verizon vs m$ Thor (Hammer of God) (Dec 05)
- Re: verizon vs m$ Thor (Hammer of God) (Dec 06)
- Re: verizon vs m$ Dan Kaminsky (Dec 06)
- Re: verizon vs m$ Thor (Hammer of God) (Dec 06)
- Re: verizon vs m$ Dan Kaminsky (Dec 07)