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Session Fixation Vulnerability in HP SIM 5.0
ACROS Security: Session Fixation Vulnerability in HP SIM 5.0
ACROS Security: Session Fixation Vulnerability in HP SIM 5.0


========================================================================ACROS Security Problem Report #2007-05-14-1
ASPR #2007-05-14-1: Session Fixation Vulnerability in HP SIM 5.0
Document ID:     ASPR #2007-05-14-1-PUB
Vendor: HP (http://www.hp.com) 
Target:          HP Systems Insight Manager
Impact:          A session fixation vulnerability in HP SIM 5.0 SP4/5 can
                 be exploited to run arbitrary comands on the servers
Severity:        High
Status:          Fixed in SIM 5.1
Discovered by:   Luka Treiber and Aljosa Ocepek of ACROS Security

Current version 

There is a session fixation vulnerability [1] in HP Systems Insight 
Manager 4.2 and 5.0 SP4/5 (IM) that allows an attacker to gain 
administrative access to IM console. As a result, the attacker can take 
complete administrative control over all managed systems, upload and 
execute malicious code on them, extract any information from them and 
disable them at her will.

Product Coverage
- HP Systems Insight Manager 4.2     - affected
- HP Systems Insight Manager 5.0 SP4 - affected
- HP Systems Insight Manager 5.0 SP5 - affected
- HP Systems Insight Manager 5.1     - not affected

The Systems Insight Manager web application is using a JSESSIONID session 
cookie for maintaining a session with administrator's browser. Apparently, 
the console is vulnerable to session fixation [1] and allows an attacker 
to obtain the session cookie, fix it on administrator's browser and thus 
force him to use that cookie when subsequently logging into the 
administration console. Once the administrator is logged in, the attacker 
can use the same cookie to enter the already logged-in session and assume 
the identity of the administrator. 

After gaining administrative rights, an attacker can do anything the 
administrator could do, including executing arbitrary commands on all 
managed computers. In SIM Service Pack 4, a new cookie JSESSIONIDSSO was 
introduced to fix this issue; however, it was possible to bypass checks 
for the JSESSIONIDSSO cookie and thus still attack the SIM administrator 
with a fixed JSESSIONID cookie.

HP has released a newer version of SIM (SIM 5.1) which fixes this issue.

[1] ACROS Security, "Session Fixation Vulnerability in Web-based
[2] Hewlett-Packard Security Bulletin

We would like to acknowledge HP Software Security Response Team (SSRT) 
for diligent and professional handling of the identified vulnerability.

ACROS d.o.o.
Makedonska ulica 113
SI - 2000 Maribor

e-mail: security@acrossecurity.com 
web: http://www.acrossecurity.com 
phone:  +386 2 3000 280
fax:    +386 2 3000 282

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   [Fingerprint: FE9E 0CFB CE41 36B0 4720 C4F1 38A3 F7DD]

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ACROS Security Papers

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The content of this report is purely informational and meant only for the
purpose of education and protection. ACROS d.o.o. shall in no event be
liable for any damage whatsoever, direct or implied, arising from use or
spread of this information. All identifiers (hostnames, IP addresses,
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are used only for explanatory purposes and have no connection with any
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use of these names means specific hosts, companies or individuals are
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entirely at user's risk.

Revision History
May 14, 2007: Initial release

(c) 2007 ACROS d.o.o. Forwarding and publishing of this document is
permitted providing the content between "[BEGIN-ACROS-REPORT]" and
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