[arch-security] [ASA-201712-1] samba: multiple issues

[Morten Linderud]

Arch Linux Security Advisory ASA-201712-1
=========================================

Severity: High
Date    : 2017-12-02
CVE-ID  : CVE-2017-14746 CVE-2017-15275
Package : samba
Type    : multiple issues
Remote  : Yes
Link    : https://security.archlinux.org/AVG-535

Summary
=======

The package samba before version 4.7.3-1 is vulnerable to multiple
issues including arbitrary code execution and information disclosure.

Resolution
==========

Upgrade to 4.7.3-1.

# pacman -Syu "samba>=4.7.3-1"

The problems have been fixed upstream in version 4.7.3.

Workaround
==========

It is possible to work around CVE-2017-14746 by disabling the SMB1
protocol in the [global] section in smb.conf:

server min protocol = SMB2

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

- CVE-2017-14746 (arbitrary code execution)

A use-after-free flaw was found in the way samba servers handled
certain SMB1 requests. An unauthenticated attacker could send
specially-crafted SMB1 requests to cause the server to crash or execute
arbitrary code.

- CVE-2017-15275 (information disclosure)

A memory disclosure flaw was found in samba. An attacker could retrieve
parts of server memory, which could contain potentially sensitive data,
by sending specially-crafted requests to the samba server.

Impact
======

A remote attacker is able to disclose sensitive information and execute
arbitrary code on the affected host.

References
==========

https://www.samba.org/samba/security/CVE-2017-14746.html
https://www.samba.org/samba/security/CVE-2017-15275.html
https://security.archlinux.org/CVE-2017-14746
https://security.archlinux.org/CVE-2017-15275
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