[arch-security] [ASA-201710-12] salt: multiple issues

[Santiago Torres-Arias]

Arch Linux Security Advisory ASA-201710-12
==========================================

Severity: Medium
Date    : 2017-10-09
CVE-ID  : CVE-2017-14695 CVE-2017-14696
Package : salt
Type    : multiple issues
Remote  : Yes
Link    : https://security.archlinux.org/AVG-438

Summary
=======

The package salt before version 2017.7.2-1 is vulnerable to multiple
issues including denial of service and directory traversal.

Resolution
==========

Upgrade to 2017.7.2-1.

# pacman -Syu "salt>=2017.7.2-1"

The problems have been fixed upstream in version 2017.7.2.

Workaround
==========

None.

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

- CVE-2017-14695 (directory traversal)

It has been discovered that maliciously crafted minion IDs can cause
unwanted directory traversals on the salt-master. The flaw is within
the minion id validation which could allow certain minions to
authenticate to a master despite not having the correct credentials. To
exploit the vulnerability, an attacker must create a salt-minion with
an ID containing path seperators that will cause a directory traversal.

- CVE-2017-14696 (denial of service)

It has been discovered that salt incorrectly handled IDs with null
bytes in decoded payloads. A specially crafted authentication request
will crash the application while processing.

Impact
======

An unauthenticated attacker is able to craft a malicious minion ID to
cause a directory traversal on the salt-master or send a specially
crafted authentication request to crash the application.

References
==========

https://groups.google.com/forum/#!topic/salt-announce/X8ZiQrZLujA
https://github.com/saltstack/salt/commit/80d90307b07b3703428ecbb7c8bb468e28a9ae6d
https://github.com/saltstack/salt/commit/5f8b5e1a0f23fe0f2be5b3c3e04199b57a53db5b
https://security.archlinux.org/CVE-2017-14695
https://security.archlinux.org/CVE-2017-14696
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