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TITLE:
Secure Elements Class 5 AVR Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA20378

VERIFY ADVISORY:
http://secunia.com/advisories/20378/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass, Spoofing, Exposure of system information, Exposure
of sensitive information, DoS, System access

WHERE:
>From local network

OPERATING SYSTEM:
Secure Elements C5 Enterprise Vulnerability Management (EVM) 2.x
http://secunia.com/product/10250/

DESCRIPTION:
Multiple vulnerabilities and security issues have been reported in
Secure Elements Class 5 AVR, which can be exploited by malicious
people to disclose potentially sensitive information, bypass certain
security restrictions, spoof the contents of messages, cause a DoS
(Denial of Service) and potentially to compromise a vulnerable
system.

1) Missing authentication of received registration messages can be
exploited to cause a DoS on the server via a large number of forged
client registration messages sent to the server.

2) A pathname validation error in the server when downloading updates
can be exploited to overwrite arbitrary files on the server with root
privileges.

3) A boundary error within the handling of the size of
EM_SET_CE_PARAMETER messages can be exploited to view the contents of
process memory on a vulnerable client.

4) Missing validation of the source address of messages can
potentially be exploited to spoof client messages sent to the
server.

5) Encryption of messages exchanged with a client is not enforced by
the server. This can potentially disclose sensitive information
within the messages.

6) The client uses the same RSA key for all installations. This can
potentially be exploited to decrypt communications between the
systems.

7) The server does not properly validate the peer certificate when
downloading updates. This can potentially be exploited to distribute
malicious updates to the clients.

8) An error in enforcing access controls on certain console
operations can be exploited to gain unauthorised administrative
access to a server.

9) A hard-coded user ID and password exists on the server. This can
potentially be exploited to gain unauthorised access to the server.

10) An error in enforcing the integrity of message digests in
received messages by both the client and the server can be exploited
to replay and modify messages without requiring knowledge of any
keys.

11) The client is identified by a CEID property which is predictable.
This may allow an attacker to guess the unique identifier of a
protected asset.

12) Missing validation of the pathname supplied in received messages
can be exploited to overwrite arbitrary files on a vulnerable client
with root privileges.

13) Missing validation of the source address of received messages can
potentially be exploited to execute arbitrary code with root
privileges on a vulnerable client.

14) An error within the authentication of "session start" messages by
the server can be exploited to cause the server to initiate TCP
connections to arbitrary destinations. This can potentially cause a
DoS on both the server and the specified target.

15) The client does not validate the target CEID in a received
message. This may facilitate further attacks without the need to
guess the true CEID of a victim asset.

The vulnerabilities and security issues have been reported in version
prior to 2.8.1.

SOLUTION:
The vulnerabilities and security issues have been fixed in C5 EVM
version 2.8.1.

Note: Class 5 AVR is now known as C5 EVM (Enterprise Vulnerability
Management).

PROVIDED AND/OR DISCOVERED BY:
Discovered by NCIRT lab and reported via US-CERT.

ORIGINAL ADVISORY:
US-CERT VU#207161:
http://www.kb.cert.org/vuls/id/207161

US-CERT VU#764025:
http://www.kb.cert.org/vuls/id/764025

US-CERT VU#873409:
http://www.kb.cert.org/vuls/id/873409

US-CERT VU#919345:
http://www.kb.cert.org/vuls/id/919345

US-CERT VU#135529:
http://www.kb.cert.org/vuls/id/135529

US-CERT VU#566553:
http://www.kb.cert.org/vuls/id/566553

US-CERT VU#207337:
http://www.kb.cert.org/vuls/id/207337

US-CERT VU#397417:
http://www.kb.cert.org/vuls/id/397417

US-CERT VU#584329:
http://www.kb.cert.org/vuls/id/584329

US-CERT VU#456729:
http://www.kb.cert.org/vuls/id/456729

US-CERT VU#353945:
http://www.kb.cert.org/vuls/id/353945

US-CERT VU#921017:
http://www.kb.cert.org/vuls/id/921017

US-CERT VU#912217:
http://www.kb.cert.org/vuls/id/912217

US-CERT VU#288121:
http://www.kb.cert.org/vuls/id/288121

US-CERT VU#227929:
http://www.kb.cert.org/vuls/id/227929

US-CERT VU#487617:
http://www.kb.cert.org/vuls/id/487617

US-CERT VU#353769:
http://www.kb.cert.org/vuls/id/353769

US-CERT VU#635721:
http://www.kb.cert.org/vuls/id/635721

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