ESB-2019.0461 - [Debian] php5: Execute arbitrary code/commands - Remote with user interaction 2019-02-13

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0461
               [SECURITY] [DLA 1674-1] php5 security update
                             13 February 2019

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

Product:           php5
Publisher:         Debian
Operating System:  Debian GNU/Linux 8
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-1000888  

Reference:         ESB-2019.0274
                   ESB-2019.0162
                   ESB-2019.0155
                   ESB-2019.0132

Original Bulletin: 
   https://lists.debian.org/debian-lts-announce/2019/02/msg00020.html

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Package        : php5
Version        : 5.6.39+dfsg-0+deb8u2
CVE ID         : CVE-2018-1000888


php-pear in php5 contains CWE-502 (Deserialization of Untrusted Data)
and CWE-915 (Improperly Controlled Modification of
Dynamically-Determined Object Attributes) vulnerabilities in its
Archive_Tar class. When extract is called without a specific prefix
path, can trigger unserialization by crafting a tar file with
`phar://[path_to_malicious_phar_file]` as path. Object injection can
be used to trigger destruct in the loaded PHP classes, all with
possible remote code execution that can result in files being deleted
or possibly modified.

For Debian 8 "Jessie", this problem has been fixed in version
5.6.39+dfsg-0+deb8u2.

We recommend that you upgrade your php5 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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