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    Debian: DSA-2233-1: postfix security update

    Date
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    Posted By
    Several vulnerabilities were discovered in Postfix, a mail transfer agent. The Common Vulnerabilities and Exposures project identifies the following problems:
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    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-2233-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                            Florian Weimer
    May 10, 2011                           https://www.debian.org/security/faq
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    Package        : postfix
    Vulnerability  : several
    Problem type   : remote
    Debian-specific: no
    CVE ID         : CVE-2009-2939 CVE-2011-0411 CVE-2011-1720
    
    Several vulnerabilities were discovered in Postfix, a mail transfer
    agent.  The Common Vulnerabilities and Exposures project identifies
    the following problems:
    
    CVE-2009-2939
            The postinst script grants the postfix user write access to
            /var/spool/postfix/pid, which might allow local users to
            conduct symlink attacks that overwrite arbitrary files.
    
    CVE-2011-0411
            The STARTTLS implementation does not properly restrict I/O
            buffering, which allows man-in-the-middle attackers to insert
            commands into encrypted SMTP sessions by sending a cleartext
            command that is processed after TLS is in place.
    
    CVE-2011-1720
            A heap-based read-only buffer overflow allows malicious
            clients to crash the smtpd server process using a crafted SASL
            authentication request.
    
    For the oldstable distribution (lenny), this problem has been fixed in
    version 2.5.5-1.1+lenny1.
    
    For the stable distribution (squeeze), this problem has been fixed in
    version 2.7.1-1+squeeze1.
    
    For the unstable distribution (sid), this problem has been fixed in
    version 2.8.0-1.
    
    We recommend that you upgrade your postfix packages.
    
    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/
    
    Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.
    

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