ACROS Security: Session Fixation Vulnerability in HP SIM 5.0 May 18 2007 02:11PM
ACROS Security (lists acros si)


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.


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Revision History

May 14, 2007: Initial release


(c) 2007 ACROS d.o.o. Forwarding and publishing of this document is
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