LastPass is scrambling to fix another serious vulnerability

The flaw could allow for remote code execution or password theft

For the second time in two weeks developers of the popular LastPass password manager are working to fix a serious vulnerability that could allow malicious websites to steal user passwords or infect computers with malware.

Like the LastPass flaws patched last week, the new issue was discovered and reported to LastPass by Tavis Ormandy, a researcher with Google's Project Zero team. The researcher revealed the vulnerability's existence in a message on Twitter, but didn't publish any technical details about it that could allow attackers to exploit it.

According to Ormandy, the flaw affects the latest version of the LastPass browser extension for all major browsers. He claims to have tested the exploit successfully on Windows and Linux, but believes that it likely works on Mac as well.

If the extension's binary component is also installed, the vulnerability allows attackers to execute malicious code on users' computers when they visit a rogue website. If the component is not present, the flaw can still be used to extract passwords from users' secure password vaults.

To make things worse, it seems the extension's presence in the browser is enough for the flaw to be exploitable. Ormandy said on Twitter that the attack still works even if the user is logged out.

This is supposedly true only for the remote code execution attack, because without a logged-in session the password vault would remain encrypted and not accessible to a website.

"We are now actively addressing the vulnerability," the LastPass developers said Monday in a blog post. "This attack is unique and highly sophisticated. We don’t want to disclose anything specific about the vulnerability or our fix that could reveal anything to less sophisticated but nefarious parties."

LastPass recommends that users launch websites for which they have stored passwords directly from inside their password vaults by using the "launch" feature. The company also advises users to turn on two-factor authentication for any online services that offer this option and to beware of phishing attacks and potentially malicious links.

Ormandy believes that it will take the company a long time to fix this vulnerability because it is "a major architectural problem." The standard vulnerability disclosure deadline enforced by Google Project Zero is 90 days.

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Lucian Constantin

IDG News Service
Show Comments

Brand Post

Bitdefender 2019

Bitdefender solutions stop attacks before they even begin! Get cybersecurity that 500 MILLION users already have and trust.

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Luke Hill

MSI GT75 TITAN

I need power and lots of it. As a Front End Web developer anything less just won’t cut it which is why the MSI GT75 is an outstanding laptop for me. It’s a sleek and futuristic looking, high quality, beast that has a touch of sci-fi flare about it.

Emily Tyson

MSI GE63 Raider

If you’re looking to invest in your next work horse laptop for work or home use, you can’t go wrong with the MSI GE63.

Laura Johnston

MSI GS65 Stealth Thin

If you can afford the price tag, it is well worth the money. It out performs any other laptop I have tried for gaming, and the transportable design and incredible display also make it ideal for work.

Andrew Teoh

Brother MFC-L9570CDW Multifunction Printer

Touch screen visibility and operation was great and easy to navigate. Each menu and sub-menu was in an understandable order and category

Louise Coady

Brother MFC-L9570CDW Multifunction Printer

The printer was convenient, produced clear and vibrant images and was very easy to use

Edwina Hargreaves

WD My Cloud Home

I would recommend this device for families and small businesses who want one safe place to store all their important digital content and a way to easily share it with friends, family, business partners, or customers.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?