ESB-2018.1776 - [UNIX/Linux][FreeBSD] password-store: Execute arbitrary code/commands - Remote with user interaction 2018-06-15

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1776
               password-store -- GPG parsing vulnerabilities
                               15 June 2018

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

Product:           password-store
Publisher:         FreeBSD
Operating System:  FreeBSD
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Overwrite Arbitrary Files       -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-12356  

Original Bulletin: 
   https://www.vuxml.org/freebsd/53eb9e1e-7014-11e8-8b1f-3065ec8fd3ec.html

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

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password-store -- GPG parsing vulnerabilities

Affected packages
password-store 	< 	1.7.2

Details
VuXML ID   53eb9e1e-7014-11e8-8b1f-3065ec8fd3ec
Discovery  2018-06-14
Entry      2018-06-14

Jason A. Donenfeld reports:

    Markus Brinkmann discovered that [the] parsing of gpg command line output
    with regexes isn't anchored to the beginning of the line, which means an
    attacker can generate a malicious key that simply has the verification
    string as part of its username.

    This has a number of nasty consequences:

        o an attacker who manages to write into your ~/.password-store and also
          inject a malicious key into your keyring can replace your .gpg-id key
          and have your passwords encrypted under additional keys;
        o if you have extensions enabled (disabled by default), an attacker who
          manages to write into your ~/.password-store and also inject a malicious
          key into your keyring can replace your extensions and hence execute
          code.

References
CVE Name  CVE-2018-12356
URL 	  https://lists.zx2c4.com/pipermail/password-store/2018-June/003308.html

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