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    Thunderbird Open to Exploit

    By
    Lisa Vaas
    -
    March 7, 2007
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      Ubuntu has a security alert out on its Thunderbird e-mail client, with a flaw that could allow an attacker to take over a vulnerable PC.

      Versions 5.10, 6.06 LTS and 6.10 are affected and can be fixed by upgrading to versions specified in Ubuntu’s alert.

      Ubuntu says the problem is with the SSLv2 protocol support in the NSS library, which isn’t sufficiently checking the validity of public keys presented with a SSL certificate. “A malicious SSL Web site using SSLv2 could potentially exploit this to execute arbitrary code with the user’s privileges,” according to Ubuntu’s notice.

      That same SSLv2 protocol support isn’t doing a good job at checking the validity of client master keys presented in an SSL client certificate. Again, remote attackers could exploit the flaw to execute code in a server application that uses the NSS library.

      Finally, a handful of flaws have been reported that let an attacker gain user privileges and take over a PC by tricking a user into opening a malicious Web page.

      Lisa Vaas
      Lisa Vaas is News Editor/Operations for eWEEK.com and also serves as editor of the Database topic center. Since 1995, she has also been a Webcast news show anchorperson and a reporter covering the IT industry. She has focused on customer relationship management technology, IT salaries and careers, effects of the H1-B visa on the technology workforce, wireless technology, security, and, most recently, databases and the technologies that touch upon them. Her articles have appeared in eWEEK's print edition, on eWEEK.com, and in the startup IT magazine PC Connection. Prior to becoming a journalist, Vaas experienced an array of eye-opening careers, including driving a cab in Boston, photographing cranky babies in shopping malls, selling cameras, typography and computer training. She stopped a hair short of finishing an M.A. in English at the University of Massachusetts in Boston. She earned a B.S. in Communications from Emerson College. She runs two open-mic reading series in Boston and currently keeps bees in her home in Mashpee, Mass.

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