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UNIRAS Brief - 574/04 - [OpenPKG-SA-2004.044] OpenPKG Security Advisory (modssl)



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 574/04 dated 18.10.04  Time: 15:40  
  UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre)
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  UNIRAS material is also available from its website at www.uniras.gov.uk and
         Information about NISCC is available from www.niscc.gov.uk
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Title
=====

[OpenPKG-SA-2004.044] OpenPKG Security Advisory (modssl)

Detail
====== 

After a renegotiation, affected versions of mod_ssl fail to ensure that the requested cipher suite is actually negotiated.

Package:             apache (option "with_mod_ssl yes" only)
Vulnerability:       information disclosure
OpenPKG Specific:    no

Affected Releases:   Affected Packages:        Corrected Packages:
OpenPKG CURRENT      <= apache-1.3.31-20041005 >= apache-1.3.31-20041015
OpenPKG 2.1          <= apache-1.3.31-2.1.4    >= apache-1.3.31-2.1.5
OpenPKG 2.0          <= apache-1.3.29-2.0.5    >= apache-1.3.29-2.0.6

Dependent Packages:  none

Description:
  Hartmut Keil discovered [0] an information disclosure vulnerability
  in mod_ssl [1], the SSL/TLS module of the Apache [2] webserver. After
  a renegotiation, affected versions of mod_ssl fail to ensure that the
  requested cipher suite is actually negotiated. In some configurations
  a client may be able to retrieve content using a cipher suite the
  server does not consider strong enough. The Common Vulnerabilities
  and Exposures (CVE) project assigned the id CAN-2004-0885 [3] to the
  problem.

  Please check whether you are affected by running "<prefix>/bin/rpm -q
  apache" and "<prefix>/bin/rpm -qi apache | grep with_mod_ssl". If you
  have the "apache" package with option "with_mod_ssl" installed and its
  version is affected (see above), we recommend that you immediately
  upgrade (see Solution) [4][5].

Solution:
  Select the updated source RPM appropriate for your OpenPKG release
  [6][7], fetch it from the OpenPKG FTP service [8][9] or a mirror
  location, verify its integrity [10], build a corresponding binary RPM
  from it [4] and update your OpenPKG installation by applying the binary
  RPM [5]. For the current release OpenPKG 2.1, perform the following
  operations to permanently fix the security problem (for other releases
  adjust accordingly).

  $ ftp ftp.openpkg.org
  ftp> bin
  ftp> cd release/2.1/UPD
  ftp> get apache-1.3.31-2.1.5.src.rpm
  ftp> bye
  $ <prefix>/bin/rpm -v --checksig apache-1.3.31-2.1.5.src.rpm
  $ <prefix>/bin/rpm --rebuild apache-1.3.31-2.1.5.src.rpm
  $ su -
  # <prefix>/bin/rpm -Fvh <prefix>/RPM/PKG/apache-1.3.31-2.1.5.*.rpm
________________________________________________________________________

References:
  [0]  http://issues.apache.org/bugzilla/show_bug.cgi?id=31505
  [1]  http://www.modssl.org/
  [2]  http://www.apache.org/
  [3]  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0885
  [4]  http://www.openpkg.org/tutorial.html#regular-source
  [5]  http://www.openpkg.org/tutorial.html#regular-binary
  [6]  ftp://ftp.openpkg.org/release/2.1/UPD/apache-1.3.31-2.1.5.src.rpm
  [7]  ftp://ftp.openpkg.org/release/2.0/UPD/apache-1.3.29-2.0.6.src.rpm
  [8]  ftp://ftp.openpkg.org/release/2.1/UPD/
  [9]  ftp://ftp.openpkg.org/release/2.0/UPD/
  [10] http://www.openpkg.org/security.html#signature
________________________________________________________________________

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For additional information or assistance, please contact the HELP Desk by 
telephone or Not Protectively Marked information may be sent via 
EMail to: uniras@xxxxxxxxxxxx

Office Hours:
Mon - Fri: 08:30 - 17:00 Hrs
Tel: +44 (0) 870 487 0748 Ext 4511
Fax: +44 (0) 870 487 0749

Outside of Office Hours:
On Call Duty Officer:
Tel: +44 (0) 870 487 0748 and follow the prompts

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UNIRAS wishes to acknowledge the contributions of OpenPKG for the information 
contained in this Briefing. 
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This Briefing contains the information released by the original author. Some 
of the information may have changed since it was released. If the vulnerability 
affects you, it may be prudent to retrieve the advisory from the canonical site 
to ensure that you receive the most current information concerning that problem.

Reference to any specific commercial product, process, or service by trade 
name, trademark manufacturer, or otherwise, does not constitute or imply 
its endorsement, recommendation, or favouring by UNIRAS or NISCC.  The views 
and opinions of authors expressed within this notice shall not be used for 
advertising or product endorsement purposes.

Neither UNIRAS or NISCC shall also accept responsibility for any errors 
or omissions contained within this briefing notice. In particular, they shall 
not be liable for any loss or damage whatsoever, arising from or in connection 
with the usage of information contained within this notice.

UNIRAS is a member of the Forum of Incident Response and Security Teams (FIRST) 
and has contacts with other international Incident Response Teams (IRTs) in 
order to foster cooperation and coordination in incident prevention, to prompt 
rapid reaction to incidents, and to promote information sharing amongst its 
members and the community at large. 
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<End of UNIRAS Briefing>

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