Aviso a la Comunidad TI, #Cisco #Security #Advisory: Multiple #Vulnerabilities

23/02/2011 Categoría NoRepublicar

Me permito comunicar a la comunidad TI que el día de hoy se han presentado una serie de vulnerabilidades en CISCO, por lo anterior me permito poner al conocimiento la información al detalle:

Multiple vulnerabilities exist within the Cisco TelePresence
Multipoint Switch. This security advisory outlines details of the
following vulnerabilities:

* Unauthenticated Java Servlet Access
* Unauthenticated Arbitrary File Upload
* Cisco Discovery Protocol Remote Code Execution
* Unauthorized Servlet Access
* Java RMI Denial of Service
* Real-Time Transport Control Protocol Denial of Service
* XML-Remote Procedure Call (RPC) Denial of Service

Duplicate Issue Identification in Other Cisco TelePresence Advisories

The Unauthenticated Java Servlet Access vulnerability affects the
Cisco TelePresence Multipoint Switch and Recording Server. The defect
as related to each component is covered in each associated advisory.
The Cisco bug IDs for these defects are as follows:

* Cisco TelePresence Multipoint Switch – CSCtf42008
* Cisco TelePresence Recording Server – CSCtf42005

The Unauthenticated Arbitrary File Upload vulnerability affects the
Cisco TelePresence Multipoint Switch and Recording Server. The defect
as related to each component is covered in each associated advisory.
The Cisco bug IDs for these defects are as follows:

* Cisco TelePresence Multipoint Switch – CSCth61065
* Cisco TelePresence Recording Server – CSCth85786

The Cisco Discovery Protocol Remote Code Execution vulnerability
affects Cisco TelePresence endpoint devices, Manager, Multipoint
Switch, and Recording Server. The defect as related to each component
is covered in each associated advisory. The Cisco bug IDs for these
defects are as follows:

* Cisco TelePresence endpoint devices – CSCtd75754
* Cisco TelePresence Manager – CSCtd75761
* Cisco TelePresence Multipoint Switch – CSCtd75766
* Cisco TelePresence Recording Server – CSCtd75769

The Java RMI Denial of Service vulnerability affects the Cisco
TelePresence Multipoint Switch and Recording Server. The defect as
related to each component is covered in each associated advisory. The
Cisco bug IDs for these defects are as follows:

* Cisco TelePresence Multipoint Switch – CSCtg35830
* Cisco TelePresence Recording Server – CSCtg35825

This advisory is posted at:
http://www.cisco.com/warp/public/707/cisco-sa-20110223-telepresence-ctms.shtml.

Affected Products
=================

These vulnerabilities affect the Cisco TelePresence Multipoint
Switch. All releases of Cisco TelePresence System Software prior to
1.7.1 are affected by one or more of the vulnerabilities listed in
this advisory.

The following table provides information pertaining to affected
software releases:

+—————————————–+
|                 | Cisco Bug | Affected |
|   Description   |     ID     | Software |
|                 |            | Releases |
|—————–+————+———-|
| Unauthenticated |            | 1.0.x,   |
| Java Servlet    | CSCtf01253 | 1.1.x,   |
| Access          |            | 1.5.x,   |
|                 |            | 1.6.x    |
|—————–+————+———-|
| Unauthenticated |            | 1.0.x,   |
| Java Servlet    | CSCtf42008 | 1.1.x,   |
| Access          |            | 1.5.x,   |
|                 |            | 1.6.x    |
|—————–+————+———-|
| Unauthenticated |            | 1.0.x,   |
| Arbitrary File | CSCth61065 | 1.1.x,   |
| Upload          |            | 1.5.x,   |
|                 |            | 1.6.x    |
|—————–+————+———-|
| Cisco Discovery |            | 1.0.x,   |
| Protocol Remote | CSCtd75766 | 1.1.x,   |
| Code Execution |            | 1.5.x,   |
|                 |            | 1.6.x    |
|—————–+————+———-|
|                 |            | 1.0.x,   |
| Unauthorized    | CSCtf97164 | 1.1.x,   |
| Servlet Access |            | 1.5.x,   |
|                 |            | 1.6.x    |
|—————–+————+———-|
|                 |            | 1.0.x,   |
| Java RMI Denial | CSCtg35825 | 1.1.x,   |
| of Service      |            | 1.5.x,   |
|                 |            | 1.6.x    |
|—————–+————+———-|
| Real-Time       |            | 1.0.x,   |
| Transport       |            | 1.1.x,   |
| Control         | CSCth60993 | 1.5.x,   |
| Protocol Denial |            | 1.6.x    |
| of Service      |            |          |
|—————–+————+———-|
|                 |            | 1.0.x,   |
| XML-RPC Denial |            | 1.1.x,   |
| of Service      | CSCtj44534 | 1.5.x,   |
|                 |            | 1.6.x,   |
|                 |            | 1.7.0    |
+—————————————–+

Vulnerable Products
+——————

Cisco TelePresence Multipoint Switch devices running an affected
version of software are affected.

To determine the current version of software running on the Cisco
TelePresence Multipoint Switch, SSH into the device and issue the
show version active and the show version inactive commands. The
output should resemble the following example:

admin: show version active
Active Master Version: 1.7.0.0-471
Active Version Installed Software Options:
No Installed Software Options Found.

admin: show version inactive
Inactive Master Version: 1.6.1.0-336

Inactive Version Installed Software Options:
No Installed Software Options Found.

In the preceding example, the system has versions 1.6.1 and 1.7.0
loaded on the device and version 1.7.0 is currently active. A device
is only affected by vulnerabilities in the active software version.

Products Confirmed Not Vulnerable
+——————————–

No other Cisco products are currently known to be affected by these
vulnerabilities

Details
=======

The Cisco TelePresence solution allows for immersive, in-person
communication and collaboration over the network with colleagues,
prospects, and partners even when they are located in opposite
hemispheres.

This security advisory describes multiple, distinct vulnerabilities
in the Cisco TelePresence Multipoint Switch. These vulnerabilities
are independent of each other.

Unauthenticated Java Servlet Access
+———————————-

A number of sensitive Java Servlets delivered via a Java Servlet
framework in the Cisco Telepresence Multipoint Switch could allow a
remote, unauthenticated attacker to perform actions that should be
restricted to administrative users only. The attacker would need the
ability to submit a crafted request to an affected device on TCP port
80, 443, or 8080.

An attacker must perform a three-way TCP handshake and establish a
valid session to exploit these vulnerabilities.

* CTMS – CSCtf42008 ( registered customers only) has been assigned
the CVE identifier CVE-2011-0383.
* CTMS – CSCtf01253 ( registered customers only) has been assigned
the CVE identifier CVE-2011-0384.

Unauthenticated Arbitrary File Upload
+————————————

An arbitrary file upload vulnerability exists in the administrative
web interface of the Cisco TelePresence Multipoint Switch. An
unauthenticated, remote attacker could submit a crafted request to an
affected device that would allow for the placement of
attacker-controlled content in arbitrary locations on the device. The
attacker would need the ability to submit a crafted request to an
affected device on TCP port 80 or 443.

An attacker must perform a three-way TCP handshake and establish a
valid session to exploit this vulnerability.

* CTMS – CSCth61065 ( registered customers only) has been assigned
the CVE identifier CVE-2011-0385.

Cisco Discovery Protocol Remote Code Execution
+———————————————

A remote code execution vulnerability exists in Cisco TelePresence
Multipoint Switch devices. An unauthenticated, adjacent attacker
could exploit the vulnerability by submitting a malicious Cisco
Discovery Protocol packet to the affected system. When parsed, the
malicious packet may trigger a buffer overflow.

Because Cisco Discovery Protocol works at the data link layer (Layer
2), an attacker must have a way to submit an Ethernet frame directly
to an affected device. This may be possible in situations where the
affected system is part of a bridged network or connected to a
nonpartitioned device such as a network hub.

* CTMS – CSCtd75766 ( registered customers only) has been assigned
the CVE identifier CVE-2011-0379.

Unauthorized Servlet Access
+————————–

An unauthorized servlet access issue exists in the administrative web
interface of Cisco TelePresence Multipoint Switch devices. This issue
could allow a remote, authenticated attacker with unprivileged access
to cause a denial of service condition on an affected device. The
attacker would need the ability to submit a crafted request to an
affected device on TCP port 80 or 443.

An attacker must perform a three-way TCP handshake and establish a
valid session to exploit this vulnerability.

* CTMS – CSCtf97164 ( registered customers only) has been assigned
the CVE identifier CVE-2011-0387.

Java RMI Denial of Service
+————————-
A denial of service vulnerability exists in Cisco TelePresence
Multipoint Switch devices due to a failure to properly restrict
access to the RMI interface of the Java Servlet framework. An
unauthenticated, remote attacker could trigger an out-of-memory
condition on the servlet host by issuing a series of crafted
requests. The attacker would need the ability to communicate to an
affected device on TCP port 8999.

An attacker must perform a three-way TCP handshake and establish a
valid session to exploit this vulnerability.

* CTMS – CSCtg35825 ( registered customers only) has been assigned
the CVE identifier CVE-2011-0388.

Real-Time Transport Control Protocol Denial of Service
+—————————————————–

A Real-Time Transport Control Protocol (RTCP) denial of service
vulnerability exists within Cisco TelePresence Multipoint Switch
devices. An unauthenticated, remote attacker could send a malicious
RTCP packet to a listening RTCP control port to crash the call
control process. The attacker would need to have the ability to
communicate to an affected device on a UDP port that was randomly
selected and negotiated during call setup.

Because the vulnerability is within a UDP-based service, the attacker
would not be required to perform a handshake prior to making the
crafted request. This could allow the attacker to spoof the source
address of an attack.

* CTMS – CSCth60993 ( registered customers only) has been assigned
the CVE identifier CVE-2011-0389.

XML-RPC Denial of Service
+————————

An XML-RPC denial of service vulnerability exists in Cisco
TelePresence Multipoint Switch devices. A remote, unauthenticated
attacker could send a malicious request to an affected device to
trigger a crash of the call geometry process. The attacker would need
the ability to communicate to an affected device on TCP port 9000.

An attacker must perform a three-way TCP handshake and establish a
valid session to exploit this vulnerability.

* CTMS – CSCtj44534 ( registered customers only) has been assigned
the CVE identifier CVE-2011-0390.

Vulnerability Scoring Details
+—————————-

Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.

CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.

Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.

Cisco has provided an FAQ to answer additional questions regarding
CVSS at:

http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html

Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at:

http://intellishield.cisco.com/security/alertmanager/cvss

* CSCtf42008 – Unauthenticated Java Servlet Access

CVSS Base Score – 10
Access Vector –            Network
Access Complexity –        Low
Authentication –           None
Confidentiality Impact –   Complete
Integrity Impact –         Complete
Availability Impact –      Complete

CVSS Temporal Score – 8.3
Exploitability –           Functional
Remediation Level –        Official-Fix
Report Confidence –        Confirmed

* CSCtf01253 – Unauthenticated Java Servlet Access

CVSS Temporal Score – 8.3
Exploitability –           Functional
Remediation Level –        Official-Fix
Report Confidence –        Confirmed

* CSCth61065 – Unauthenticated Arbitrary File Upload

CVSS Temporal Score – 8.3
Exploitability –           Functional
Remediation Level –        Official-Fix
Report Confidence –        Confirmed

* CSCtd75766 – Cisco Discovery Protocol Remote Code Execution

CVSS Base Score – 7.9
Access Vector –            Adjacent Network
Access Complexity –        Medium
Authentication –           None
Confidentiality Impact –   Complete
Integrity Impact –         Complete
Availability Impact –      Complete

CVSS Temporal Score – 6.5
Exploitability –           Functional
Remediation Level –        Official-Fix
Report Confidence –        Confirmed

* CSCtf97164 – Unauthorized Servlet Access

CVSS Base Score – 8.0
Access Vector –            Network
Access Complexity –        Low
Authentication –           Single
Confidentiality Impact –   Partial
Integrity Impact –         Partial
Availability Impact –      Complete

CVSS Temporal Score – 6.6
Exploitability –           Functional
Remediation Level –        Official-Fix
Report Confidence –        Confirmed

* CSCtg35825 – Java RMI Denial of Service

CVSS Base Score – 7.8
Access Vector –            Network
Access Complexity –        Low
Authentication –           None
Confidentiality Impact –   None
Integrity Impact –         None
Availability Impact –      Complete

CVSS Temporal Score – 6.4
Exploitability –           Functional
Remediation Level –        Official-Fix
Report Confidence –        Confirmed

* CSCth60993 – Real-Time Transport Control Protocol Denial of Service

CVSS Temporal Score – 6.4
Exploitability –           Functional
Remediation Level –        Official-Fix
Report Confidence –        Confirmed

* CSCtj44534 – XML-RPC Denial of Service

CVSS Temporal Score – 6.4
Exploitability –           Functional
Remediation Level –        Official-Fix
Report Confidence –        Confirmed
Impact
======

Successful exploitation of the Unauthenticated Java Servlet
(CSCtf42008, CSCtf01253) vulnerabilities could allow an
unauthenticated, remote attacker to take complete control of the
affected device.

Successful exploitation of the Unauthenticated Arbitrary File Upload
(CSCth61065) vulnerability could allow an unauthenticated, remote
attacker to place or overwrite arbitrary files on the affected
system. This may allow the attacker to gain full control of the
affected device.

Successful exploitation of the Cisco Discovery Protocol Remote Code
Execution (CSCtd75766) vulnerability could allow an unauthenticated,
adjacent attacker to take complete control of the affected system.

Successful exploitation of the Unauthorized Servlet Access
(CSCtf97164) vulnerability could allow a remote, authenticated
attacker to perform certain actions on the system that should be
restricted by the attacker’s privilege level.

Successful exploitation of the Java RMI Denial of Service
(CSCtg35825) vulnerability could allow an unauthenticated, remote
attacker to cause all web-based services to become inaccessible.

Successful exploitation of the Real-Time Transport Control Protocol
Denial of Service (CSCth60993) vulnerability could allow an
unauthenticated, remote attacker to terminate all active calls on the
affected device.

Successful exploitation of the XML-RPC Denial of Service (CSCtj44534)
vulnerability could allow an unauthenticated, remote attacker to
terminate all current calls and potentially cause the device to
become unusable for future calls.

Software Versions and Fixes
===========================

When considering software upgrades, also consult
http://www.cisco.com/go/psirt and any subsequent advisories to
determine exposure and a complete upgrade solution.

In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.

Each row of the following Cisco TelePresence System Software table
defines a specific defect, the “First Fixed Release”, and the
“Recommended Release” to resolve all of the security issues
identified in this advisory as well as other non-security related
issues. Cisco recommends upgrading to a release equal to or later
than the release in the Recommended Release column of the table.

It is recommended that all components of the Cisco TelePresence
solution be upgraded to 1.7.1 or greater.

Workarounds
===========

There are no device- or system-based workarounds for the identified
vulnerabilities.

Additional mitigations that can be deployed on Cisco devices within
the network are available in the Cisco Applied Intelligence companion
document for this Advisory:

http://www.cisco.com/warp/public/707/cisco-amb-20110223-telepresence.shtml

Obtaining Fixed Software
========================

Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.

Customers may only install and expect support for the feature sets
they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound
by the terms of Cisco’s software license terms found at:
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
or as otherwise set forth at Cisco.com Downloads at:
http://www.cisco.com/public/sw-center/sw-usingswc.shtml

Do not contact psirt@cisco.com or security-alert@cisco.com for
software upgrades.

Fuente : CISCO

Tags: cisco, infeccion, seguridad, servicios, Tecnologia, tips, vulnerabilidad

Victor Miranda

Professional Ethical Hacker, Pentester & Forensics Investigator MPCS, CEH v8, CSSP, CICP-CICAP HTCIA Member & ISECOM Member Twitter: @victormirandamx

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