Feeds

Opera scrambles to quash zero-day bug in freshly-patched browser

Multiple platform pwnage

The essential guide to IT transformation

Just a few days after Opera Software patched critical vulnerabilities in its browser, researchers have identified another serious bug that allows attackers to remotely execute malicious code on the machines of people running the most recent version of the software. Opera has vowed to fix the flaw soon.

Among the bugs squashed in Opera 9.61 was a stored cross site scripting (XSS) vulnerability that allowed attackers to view victims' browsing history. That attack is no longer possible, but now researchers have discovered an even more serious exploit that's based on the same weakness.

Simply viewing a booby-trapped webpage with Opera is all that's required to run code of an attacker's choosing on a machine. Researcher Aviv Raff shared a link with us that caused our Windows machine to load the calculator, but certainly less benign exploits are possible as well. The attack works on OS X and Linux machines as well, he says.

Opera is aware of the vulnerability and is in the final stages of testing a new version of the browser that fixes the problem, company spokesman Thomas Ford says. He says version 9.62 will be released "very, very soon," but he can't say exactly when.

"We always appreciate people digging and looking for security vulnerabilities in our products," Ford says. "We want them to be as robust as they can be."

The vulnerability was jointly discovered when researchers Roberto Suggi, Stefano Di Paola, and Raff began discussing the possibility of expanding Opera's browser history flaw to carry out other types of mischief. In short order, Raff came up with this proof-of-concept attack that launches a PC's calculator. That exploit no longer works with version 9.61, but a separate exploit, which Raff does not want published, does exactly the same thing on fully patched machines running Opera.

"They should have looked at the code of this local resource for more vulnerabilities," Raff tells El Reg. "The fixed one is within the displayed links in the searched history. The unfixed one is within the Previous/Next links of the history search page itself."

The Opera bug comes as researchers have warned of a separate vulnerability affecting multiple browsers. Exploiting the FTP client XSS design vulnerability could allow attackers to "execute arbitrary script code in the browser of an unsuspecting user in the context of an FTP session," Sunbelt Software's Michael St. Neitzel warns here. Firefox and Google Chrome are both vulnerable. ®

Next gen security for virtualised datacentres

More from The Register

next story
Ice cream headache as black hat hacks sack Dairy Queen
I scream, you scream, we all scream 'DATA BREACH'!
Goog says patch⁵⁰ your Chrome
64-bit browser loads cat vids FIFTEEN PERCENT faster!
KER-CHING! CryptoWall ransomware scam rakes in $1 MEEELLION
Anatomy of the net's most destructive ransomware threat
NIST to sysadmins: clean up your SSH mess
Too many keys, too badly managed
Scratched PC-dispatch patch patched, hatched in batch rematch
Windows security update fixed after triggering blue screens (and screams) of death
Researchers camouflage haxxor traps with fake application traffic
Honeypots sweetened to resemble actual workloads, complete with 'secure' logins
Attack flogged through shiny-clicky social media buttons
66,000 users popped by malicious Flash fudging add-on
New Snowden leak: How NSA shared 850-billion-plus metadata records
'Federated search' spaffed info all over Five Eyes chums
Three quarters of South Korea popped in online gaming raids
Records used to plunder game items, sold off to low lifes
prev story

Whitepapers

5 things you didn’t know about cloud backup
IT departments are embracing cloud backup, but there’s a lot you need to know before choosing a service provider. Learn all the critical things you need to know.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Backing up Big Data
Solving backup challenges and “protect everything from everywhere,” as we move into the era of big data management and the adoption of BYOD.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?