LastPass discloses now-fixed vulnerabilities ahead of security conference

The company doesn't believe attackers exploited the flaws

Popular password manager LastPass said it fixed two vulnerabilities that were found last year. The disclosure comes just ahead of a security conference where a research paper describing the problems is due to be presented.

Zhiwei Li, a research scientist at Shape Security, reported the flaws to LastPass in August 2013, which were "addressed immediately," LastPass wrote on its blog.

Both flaws involved "bookmarklets," which assist in filling out stored password information when LastPass's plugin can't be used, such as when using a mobile browser.

One flaw could be exploited if a bookmarklet was used on a website rigged to attack it, LastPass wrote. The other vulnerability could allow an attacker to create a bogus one-time password (OTP) if a LastPass user was tricked into visiting a malicious website.

The OTP attack would require a hacker to know a person's username in order to exploit it and also serve a custom attack, LastPass wrote.

"Even if this was exploited, the attacker would still not have the key to decrypt user data," the company said.

Zhiwei co-authored a research paper that has been accepted by the Usenix Security Symposium, which starts in San Diego on Aug. 20.

The study analyzed five popular Web-based password managers: LastPass, RoboForm, My1login, PasswordBox and NeedMyPassword, all of which run in a Web browser.

The researchers wrote that "in four out of the five password managers we studied, an attacker can learn a user's credentials for arbitrary websites."

LastPass wrote it didn't believe anyone other than Zhiwei exploited the flaws. Still, "if you are concerned that you've used bookmarklets before September 2013 on non-trustworthy sites, you may consider changing your master password and generating new passwords, though we don't think it is necessary."

Send news tips and comments to Follow me on Twitter: @jeremy_kirk

Join the CSO newsletter!

Error: Please check your email address.

Tags LastPasssecurityExploits / vulnerabilities

Show Comments

Featured Whitepapers

Editor's Recommendations

Solution Centres

Stories by Jeremy Kirk

Latest Videos

  • 150x50

    CSO Webinar: Will your data protection strategy be enough when disaster strikes?

    Speakers: - Paul O’Connor, Engagement leader - Performance Audit Group, Victorian Auditor-General’s Office (VAGO) - Nigel Phair, Managing Director, Centre for Internet Safety - Joshua Stenhouse, Technical Evangelist, Zerto - Anthony Caruana, CSO MC & Moderator

    Play Video

  • 150x50

    CSO Webinar: The Human Factor - Your people are your biggest security weakness

    ​Speakers: David Lacey, Researcher and former CISO Royal Mail David Turner - Global Risk Management Expert Mark Guntrip - Group Manager, Email Protection, Proofpoint

    Play Video

  • 150x50

    CSO Webinar: Current ransomware defences are failing – but machine learning can drive a more proactive solution

    Speakers • Ty Miller, Director, Threat Intelligence • Mark Gregory, Leader, Network Engineering Research Group, RMIT • Jeff Lanza, Retired FBI Agent (USA) • Andy Solterbeck, VP Asia Pacific, Cylance • David Braue, CSO MC/Moderator What to expect: ​Hear from industry experts on the local and global ransomware threat landscape. Explore a new approach to dealing with ransomware using machine-learning techniques and by thinking about the problem in a fundamentally different way. Apply techniques for gathering insight into ransomware behaviour and find out what elements must go into a truly effective ransomware defence. Get a first-hand look at how ransomware actually works in practice, and how machine-learning techniques can pick up on its activities long before your employees do.

    Play Video

  • 150x50

    CSO Webinar: Get real about metadata to avoid a false sense of security

    Speakers: • Anthony Caruana – CSO MC and moderator • Ian Farquhar, Worldwide Virtual Security Team Lead, Gigamon • John Lindsay, Former CTO, iiNet • Skeeve Stevens, Futurist, Future Sumo • David Vaile - Vice chair of APF, Co-Convenor of the Cyberspace Law And Policy Community, UNSW Law Faculty This webinar covers: - A 101 on metadata - what it is and how to use it - Insight into a typical attack, what happens and what we would find when looking into the metadata - How to collect metadata, use this to detect attacks and get greater insight into how you can use this to protect your organisation - Learn how much raw data and metadata to retain and how long for - Get a reality check on how you're using your metadata and if this is enough to secure your organisation

    Play Video

  • 150x50

    CSO Webinar: How banking trojans work and how you can stop them

    CSO Webinar: How banking trojans work and how you can stop them Featuring: • John Baird, Director of Global Technology Production, Deutsche Bank • Samantha Macleod, GM Cyber Security, ME Bank • Sherrod DeGrippo, Director of Emerging Threats, Proofpoint (USA)

    Play Video

More videos

Blog Posts

Market Place