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Internet Explorer users beware, there is a new zero day (previously unknown, unpatched vulnerability) attack targeting your browser.
Microsoft has issued an advisory about the flaw and it is being referred to as CVE-2012-4792. Microsoft has also made a temporary FixIt available until it can deliver a formal patch.
The flaw affects users of Internet Explorer 6, 7 and 8, but not 9 or 10 and allows for remote code execution with the privileges of the logged in user.
Another poignant reminder that running your computer as a non-administrative user pays off when new flaws are uncovered.
Non-privileged users will severely limit the damage that can be done using a vulnerability like this one.
The vulnerability was initially
" href="http://blog.fireeye.com/research/2012/12/council-foreign-relations-water-hole-attack-details.html" rel="nofollow">discovered by FireEye on the Council on Foreign Relations website on December 27th, 2012.
SophosLabs has records showing the Council's website infected as far back as December 7th.
We have seen the exploit used on at least five additional websites suggesting the attack is more widespread than originally thought.
The attack appears to be closely related to attacks we reported on last June that were targeting visitors to a major hotel chain.
While the vulnerability being exploited is entirely different, the payload is nearly identical to the hotel attack and others we have associated with the Elderwood Project.
While the attacks appeared to be targeted to a small number of sites, there is no obvious link between the victims.
Some are referring to this as a "watering hole" attack, but the evidence we have doesn't necessarily support that conclusion.
If you use Internet Explorer, be sure you are using at least version 9 to avoid being a victim of these attacks. If you can't upgrade, consider using an alternative browser until an official fix is available.
Microsoft's FixIt is intended as a temporary workaround that could also be considered, but until an official fix is available I recommend avoiding IE 8 and lower.
If further information becomes available, we will publish the latest here on Naked Security.
Sophos Anti-Virus on all platforms blocks this malware as follows:
• Sus/20124792-B: Misc. files specifically associated with this attack
• Sus/Yoldep-A: Encoded payload also seen in other Elderwood Project attacks
• Troj/SWFExp-BF: Adobe Flash component
• Sus/DeplyJv-A: JavaScript components evolved from earlier Elderwood Project attacks
Follow @chetwisniewski
Watering hole photo courtesy of Shutterstock.
On Sunday, December 16th the Iranian CERT issued an advisory warning of a new "targeted data wiping malware."
Attacks against the websites of leading banks in the United States have the banking and financial services industry on edge.
Wells Fargo used its Twitter account to apologize for service interruptions on Wednesday and said it was working to "quickly resolve this issue." Most of the targeted banks were back online and operational Thursday.
Experts at SophosLabs are recommending that businesses and organisations check that they are keeping up-to-date with their security patches, in the light of a malware attack that was seen today - targeting a defence contractor.


Both Google and Microsoft have put out alerts about an unpatched, zero-day hole in Internet Explorer that didn't get fixed on Patch Tuesday and is actively being exploited in the wild. 