Linux Security
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    Debian: DSA-2164-1: shadow security update

    Date 15 Feb 2011
    129
    Posted By LinuxSecurity Advisories
    Kees Cook discovered that the chfn and chsh utilities do not properly sanitize user input that includes newlines. An attacker could use this to to corrupt passwd entries and may create users or groups in NIS environments.
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    Debian Security Advisory DSA-2164-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                                Nico Golde
    February 16, 2011                      https://www.debian.org/security/faq
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    Package        : shadow
    Vulnerability  : insufficient input sanitization
    Problem type   : local
    Debian-specific: no
    CVE ID         : CVE-2011-0721
    
    Kees Cook discovered that the chfn and chsh utilities do not properly
    sanitize user input that includes newlines.  An attacker could use this
    to to corrupt passwd entries and may create users or groups in NIS
    environments.
    
    
    Packages in the oldstable distribution (lenny) are not affected by this
    problem.
    
    For the stable distribution (squeeze), this problem has been fixed in
    version 1:4.1.4.2+svn3283-2+squeeze1.
    
    For the testing (wheezy) and unstable (sid) distributions, this problem
    will be fixed soon.
    
    We recommend that you upgrade your shadow 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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