 Smokey Bearveritas odium paritPremium
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kudos:4 | [VULNERABILITY] IE6 and IE7 0-Day Exploit Reported SANS | 2009-11-22
»isc.sans.org/diary.html?storyid=7624
A vulnerability has been identified in Microsoft Internet Explorer, which could be exploited by attackers to compromise a vulnerable system. This issue is caused by a dangling pointer in the Microsoft HTML Viewer (mshtml.dll) when retrieving certain CSS/STYLE objects via the "getElementsByTagName()" method, which could allow attackers to crash an affected browser or execute arbitrary code by tricking a user into visiting a malicious web page.
Symantec has verified the exploit:
November 21, 2009 - "A new exploit targeting Internet Explorer was published to the BugTraq mailing list yesterday. Symantec has conducted further tests and confirmed that it affects Internet Explorer versions 6 and 7 as well. The exploit currently exhibits signs of poor reliability, but we expect that a fully-functional reliable exploit will be available in the near future... To minimize the chances of being affected by this issue, Internet Explorer users should ensure their antivirus definitions are up to date, disable JavaScript and only visit Web sites they trust until fixes are available from Microsoft." Symantec: »www.symantec.com/connect/blogs/z···ublished
SecurityFocus BugTraq: »www.securityfocus.com/archive/1/···threaded
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Smokey Bearveritas odium paritPremium
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kudos:4 | New attack fells Internet ExplorerNetworkworld | 11/22/2009A hacker has posted attack code that could be used to break into a PC running older versions of Microsoft's Internet Explorer browser. The code was posted Friday to the Bugtraq mailing list by an unidentified hacker. According to security vendor Symantec, the code does not always work properly, but it could be used to install unauthorized software on a victim's computer. "Symantec has conducted further tests and confirmed that it affects Internet Explorer versions 6 and 7," the company wrote on its Web site Saturday. "We expect that a fully-functional reliable exploit will be available in the near future." Security consultancy Vupen Security has also confirmed that the attack works, saying it worked on a Windows XP Service Pack 3 system running IE 6 or IE7. Neither company was able to confirm that the attack worked on Microsoft's latest browser, IE 8. Symantec did not report that the attack is being used by cyber-criminals, but because Internet Explorer is so popular, this type of code is highly coveted by hackers. If the software does pop up in online attacks, it will put pressure on Microsoft to rush out an emergency patch, ahead of its regularly scheduled Dec. 8 security update. Microsoft could not be reached Saturday for a comment on the issue. Together, IE 6 and IE 7 command close to 40 percent of the browser market.
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4 edits | reply to Smokey Bear
quote:
»www.securityfocus.com/archive/1/···threaded
The exploit is detected and blocked by Microsoft Security Essentials (Exploit:JS/ShellCode.gen) 
Try yourself:
1. copy the code on a new file test.htm
2. open test.htm
==> MSE will block it |
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Smokey Bearveritas odium paritPremium
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kudos:4 | reply to Smokey Bear
This exploit prove (again) the importance of having an AV and keeping antivirus definitions up to date. |
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| And, having file permissions configured to block zero days and lacking definitions. |
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| reply to matunga
AVG also detects it |
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PrntRhdPremium
join:2004-11-03
Fairfield, CA | reply to Smokey Bear
Avast Home and Avast Pro detects it. |
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Smokey Bearveritas odium paritPremium
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kudos:4 | reply to Smokey Bear
Interesting remarks Symantec: "Symantec currently detects the exploit with the Bloodhound.Exploit.129 antivirus signature and is working on new signatures now. Symantec IPS protection also currently detects this exploit with signatures HTTP Microsoft IE Generic Heap Spray BO and HTTP Malicious Javascript Heap Spray BO. A new IPS signature, HTTP IE Style Heap Spray BO, has also been created for this specific exploit."
So when I understand well, for this specific exploit are new signatures demanded, and I assume this will be valid for all AV vendors..
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| reply to Smokey Bear
Thanks for the post, Smokey! |
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| reply to Smokey Bear
said by Smokey Bear:Interesting remarks Symantec: "Symantec currently detects the exploit with the Bloodhound.Exploit.129 antivirus signature and is working on new signatures now. Symantec IPS protection also currently detects this exploit with signatures HTTP Microsoft IE Generic Heap Spray BO and HTTP Malicious Javascript Heap Spray BO. A new IPS signature, HTTP IE Style Heap Spray BO, has also been created for this specific exploit."So when I understand well, for this specific exploit are new signatures demanded, and I assume this will be valid for all AV vendors.. Smokey,
I think what this is saying is that they already had the Generic Heapy Spray sig to cover this, however, more specific sigs were written to detect this particular exploit and not just heap sprays in general.
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The official Norton Forum from Symantec: »community.norton.com/norton/ |
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| reply to Smokey Bear
»ipolicynetworks.com/technology/f···ity.html |
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 siljalineI'm lovin' that double widePremium
join:2002-10-12
Montreal, QC
kudos:17
 ·Bell Sympatico
| reply to Smokey Bear
Thanks to: VikingBob  for relating your post, Smokey Bear to: »Microsoft Security Advisory (977981) |
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1 edit | Mitigating Factors:
- Internet Explorer 8 is not affected.
- Protected Mode in Internet Explorer 7 in Windows Vista limits the impact of the vulnerability.
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| said by matunga:Protected Mode in Internet Explorer 7 in Windows Vista limits the impact of the vulnerability. Thanks Matunga. Since you have tested this exploit can you tell us if UAC prompts for permission to run the arbitrary code ? |
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 ThrowDemsOutIf you can't convince 'em, confuse 'emPremium
join:2002-03-03
Mullica Hill, NJ
kudos:4 | reply to Smokey Bear
MS releases advisory on this Story:
»tech.yahoo.com/news/pcworld/2009···rability
Advisory:
»www.microsoft.com/technet/securi···981.mspx |
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Smokey Bearveritas odium paritPremium
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kudos:4 | reply to Smokey Bear
Re: [VULNERABILITY] IE6 and IE7 0-Day Exploit Reported Folks, txs for the additions to my post. |
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Smokey Bearveritas odium paritPremium
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kudos:4 | reply to siljaline
Advisory revised (11-25-2009): »Microsoft Security Advisory (977981)
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 Blue2Premium
join:2004-04-14
France
kudos:1 | reply to Smokey Bear
Apparently, the exploit is being "improved".
"Hackers working on the open-source Metasploit project have spiffed up a zero-day attack on Microsoft's Internet Explorer, making it more reliable -- and more likely to be used by criminals.
Security experts have been worried about the flaw since it was first disclosed on the Bugtraq mailing list Friday.
...
To improve the exploit, the Metasploit team used a technique borrowed from two well-known security researchers, Greenbaum (senior research manager with Symantec) said. "The initial exploit used heap-spraying technology," he said. "It's kind of like a shotgun attack, where you try a lot of things at once and hope one of them catches."
The latest attack uses a .net dlll memory technique developed by Alexander Sotirov and Marc Dowd. "This will be much more reliable than the heap-spraying technology," he added. "There's really no question about it"»tech.yahoo.com/news/pcworld/2009···improved
Anyone heard anything further on this? Matunga? |
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Smokey Bearveritas odium paritPremium
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kudos:4 | said by Blue2:Apparently, the exploit is being "improved". "Hackers working on the open-source Metasploit project have spiffed up a zero-day attack on Microsoft's Internet Explorer, making it more reliable -- and more likely to be used by criminals.Anyone heard anything further on this? Matunga? Uhhh, not Matunga, this time it's me...  
Metasploit releases IE attack, but it's unreliable
Networkworld | 11/25/2009
Developers of the open-source Metasploit penetration testing toolkit have released code that can compromise Microsoft's Internet Explorer browser, but the software is not as reliable as first thought.
The code exploits an Internet Explorer bug that was disclosed last Friday in a proof-of-concept attack posted to the Bugtraq mailing list. That first code was unreliable, but security experts worried that someone would soon develop a better version that would be adopted by cyber-criminals.
The original attack used a "heap-spray" technique to exploit the vulnerability in IE. But for a while Wednesday, it looked as though the Metasploit team had released a more reliable exploit.
They used a different technique to exploit the flaw, one pioneered by researchers Alexander Sotirov and Marc Dowd, but Metasploit eventually pulled its code.
"The bug itself is unreliable," Metasploit developer HD Moore said in a Twitter message Wednesday. The Metasploit code tried to exploit the flaw in two ways, one of which was "problematic," and the other of which was the heap-spray technique that had already been ineffective. »www.networkworld.com/news/2009/1···but.html
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kudos:4 | Follow up: Microsoft will patch the vulnerability on Tuesday 2009-12-08 (also mentioned by Just Bob in another thread): »blogs.technet.com/msrc/archive/2···ion.aspx |
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