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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.4556
                          libonig security update
                              5 December 2019

===========================================================================

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

Product:           libonig
Publisher:         Debian
Operating System:  Debian GNU/Linux 8
                   UNIX variants (UNIX, Linux, OSX)
                   Windows
Impact/Access:     Denial of Service        -- Remote/Unauthenticated
                   Access Confidential Data -- Remote/Unauthenticated
                   Reduced Security         -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-19246 CVE-2019-19204 CVE-2019-19012

Original Bulletin: 
   https://www.debian.org/lts/security/2019/dla-2020

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

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Package        : libonig
Version        : 5.9.5-3.2+deb8u4
CVE ID         : CVE-2019-19012 CVE-2019-19204 CVE-2019-19246
Debian Bug     : 944959 945313


Several vulnerabilities were discovered in the Oniguruma regular
expressions library, notably used in PHP mbstring.

CVE-2019-19012

    An integer overflow in the search_in_range function in regexec.c
    leads to an out-of-bounds read, in which the offset of this read
    is under the control of an attacker. (This only affects the 32-bit
    compiled version). Remote attackers can cause a denial-of-service
    or information disclosure, or possibly have unspecified other
    impact, via a crafted regular expression.

CVE-2019-19204

    In the function fetch_range_quantifier in regparse.c, PFETCH is
    called without checking PEND. This leads to a heap-based buffer
    over-read and lead to denial-of-service via a crafted regular
    expression.

CVE-2019-19246

    Heap-based buffer over-read in str_lower_case_match in regexec.c
    can lead to denial-of-service via a crafted regular expression.

For Debian 8 "Jessie", these problems have been fixed in version
5.9.5-3.2+deb8u4.

We recommend that you upgrade your libonig 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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===========================================================================
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