Password-stealing flaws in LastPass Chrome and Firefox extensions

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Tavis Ormandy, a security researcher on Google’s Project Zero team, warned of flaws in LastPass browser extensions, vulnerabilities which – if a person surfed to a malicious site – would allow the malicious site to steal passwords from the password manager.

LastPass said it patched the vulnerability in its Chrome extension and said it is working on a fix for the flaw in its Firefox add-on.

Ormandy originally said the LastPass bug affected 4.1.42 Chrome and Firefox browser extensions. He developed a working exploit for a Windows box running the LastPass Chrome extension, but said it “could be made to work on other platforms.” He sent the details to LastPass before adding:

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