ESB-2018.0603 - [Linux][Debian] freexl: Multiple vulnerabilities 2018-03-02

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.0603
          Multiple vulnerabilities have been identified in freexl
                               2 March 2018

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:          freexl
Publisher:        Debian
Operating System: Debian GNU/Linux 7
                  Linux variants
Impact/Access:    Execute Arbitrary Code/Commands -- Remote with User Interaction
                  Denial of Service               -- Remote with User Interaction
Resolution:       Patch/Upgrade
CVE Names:        CVE-2018-7439 CVE-2018-7438 CVE-2018-7437
                  CVE-2018-7436 CVE-2018-7435 

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Debian. It is recommended that administrators 
         running freexl check for an updated version of the software for 
         their operating system.

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Package        : freexl
Version        : 1.0.0b-1+deb7u5
CVE ID         : CVE-2018-7435 CVE-2018-7436 CVE-2018-7437 CVE-2018-7438
                 CVE-2018-7439


Leon reported five heap-based buffer-overflow vulnerabilities in FreeXL.

CVE-2018-7435

    There is a heap-based buffer over-read in the freexl::destroy_cell
    function.

CVE-2018-7436

    There is a heap-based buffer over-read in a pointer dereference of
    the parse_SST function.

CVE-2018-7437

    There is a heap-based buffer over-read in a memcpy call of the
    parse_SST function.

CVE-2018-7438

    There is a heap-based buffer over-read in the parse_unicode_string
    function.

CVE-2018-7439

    There is a heap-based buffer over-read in the function
    read_mini_biff_next_record.

For Debian 7 "Wheezy", these problems have been fixed in version
1.0.0b-1+deb7u5.

We recommend that you upgrade your freexl packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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