search menu icon-carat-right cmu-wordmark

CERT Coordination Center


NSIS Inetc plug-in fails to validate SSL certificates

Vulnerability Note VU#894897

Original Release Date: 2015-03-20 | Last Revised: 2015-09-08

Overview

The Intetc plugin for the NSIS installer fails to validate SSL certificates, which makes affected installers vulnerable to HTTPS spoofing.

Description

Inetc is a plugin for the NSIS installer software that provides the ability to download files from the internet. Although Inetc supports the ability to download files using the HTTPS protocol, it does not validate SSL certificate chains.

Impact

An attacker can spoof content retrieved using HTTPS. Depending on what the installer does with content retrieved over HTTPS, the impact can be as severe as arbitrary code execution with elevated privileges.

Solution

Apply an update

This issue is resolved in Inetc builds starting September 6, 2015. This version no longer passes any SECURITY_FLAG_IGNORE_* flags to WinINet by default.

Only install software while connected to a trusted network

Because the Inetc plugin does not validate SSL certificates, any software installers that are NSIS-based should not be used while connected to a network that is either inherently untrusted, or one that has untrusted users on it.

Vendor Information

894897
Expand all

CERT/CC

Updated:  March 20, 2015

Status

  Affected

Vendor Statement

The installer for FOE is affected. To minimize the risk of installing FOE on an untrusted network use the installer on the ISO.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Vendor References

http://www.cert.org/vulnerability-analysis/tools/foe.cfm

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Dropbox

Notified:  March 03, 2015 Updated:  March 20, 2015

Status

  Affected

Vendor Statement

Dropbox patched its service within hours of notification, and the fix went live on March 4, 2015. All Dropbox clients are safe, and there is no evidence to indicate the vulnerability was ever exploited. Users are not vulnerable and don't need to take any action.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Addendum

Dropbox 3.2.9 addresses this issue by performing additional validation of downloaded files.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Nullsoft

Notified:  January 31, 2011 Updated:  February 25, 2015

Status

  Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Vendor References

http://nsis.sourceforge.net/Inetc_plug-in

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

AVG Anti-virus Software

Notified:  February 25, 2015 Updated:  February 26, 2015

Statement Date:   February 26, 2015

Status

  Not Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

AVG is not using NSIS for installation.
The only thing that ties to NSIS is that AVG scanning engine can unpack and scan NSIS installation packages.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Unify Inc

Notified:  February 25, 2015 Updated:  March 23, 2015

Status

  Not Affected

Vendor Statement

Unify is using the NSIS in parts of its product portfolio, but only in the context of its own SW provisioning and update processes, that provide appropriate integrity protection. The Inetc plugin of NSIS is not used.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

7-Zip.org

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

AMD

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Adobe

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Amazon

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Debian GNU/Linux

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

DivX, Inc.

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Ericsson

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

FreeRADIUS

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Google

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Intel Corporation

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

McAfee

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Mozilla

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Nokia

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

OpenVPN Technologies

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Oracle Corporation

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Pidgin

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Ubuntu

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

VideoLAN

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Wireshark

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Xen

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Yahoo, Inc.

Notified:  February 25, 2015 Updated:  February 25, 2015

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

Group Score Vector
Base 7.3 AV:A/AC:M/Au:N/C:C/I:C/A:--
Temporal 7.3 E:H/RL:U/RC:C
Environmental 7.3 CDP:ND/TD:ND/CR:ND/IR:ND/AR:ND

References

Credit

This vulnerability was reported by Will Dormann of the CERT/CC.

This document was written by Will Dormann.

Other Information

CVE IDs: CVE-2015-0941
Date Public: 2011-01-31
Date First Published: 2015-03-20
Date Last Updated: 2015-09-08 15:54 UTC
Document Revision: 26

Sponsored by the Department of Homeland Security Office of Cybersecurity and Communications.