[gentoo-announce] [ GLSA 201710-07 ] OCaml: Privilege escalation

[gentoo-announce] [ GLSA 201710-07 ] OCaml: Privilege escalation

[Aaron Bauman]

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Gentoo Linux Security Advisory                           GLSA 201710-07
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                                           https://security.gentoo.org/
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 Severity: High
    Title: OCaml: Privilege escalation
     Date: October 08, 2017
     Bugs: #622544
       ID: 201710-07

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Synopsis
========

A vulnerability in OCaml may allow local users to gain root privileges.

Background
==========

OCaml is a high-level, strongly-typed, functional, and object-oriented
programming language from the ML family of languages.

Affected packages
=================

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  dev-lang/ocaml               < 4.04.2                  >= 4.04.2 

Description
===========

A bad sanitization of environment variables: CAML_CPLUGINS,
CAML_NATIVE_CPLUGINS and CAML_BYTE_CPLUGINS in the OCaml compiler
allows the execution of raised privileges via external code.

Impact
======

A local attacker, by using specially crafted environment variables,
could possibly escalate privileges to the root group.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All OCaml users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=dev-lang/ocaml-4.04.2"

References
==========

[ 1 ] CVE-2017-9772
      https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-9772

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 https://security.gentoo.org/glsa/201710-07

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2017 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5

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