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Home » Hacking News » CLA-2002:513-openssl

CLA-2002:513-openssl

by Nikola Strahija on July 31st, 2002 OpenSSL implements the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as full-strength general purpose cryptography functions. It's used (as a library) by several projects, like Apache, OpenSSH, Bind, OpenLDAP and many others clients and servers programs.


While conducting a security review of OpenSSL under the DARPA CHATS
program[1], A.L Digital and The Bunker found some buffer overflow
vulnerabilities in OpenSSL prior to (and including) versions 0.9.6e
and 0.9.7-beta2 (development).

Neophasis consultants indenpendently discovered one of these buffer
overflows and demonstrated that it was exploitable, although the
exploit is not released at this time.

The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the names CAN-2002-0655, CAN-2002-0656 and CAN-2002-0657 to
these issues.

Adi Stav and James Yonan
independently found another vulnerability which affects the ASN.1
parser.

This update fix these vulnerabilites and also adds various sanity
checks to avoid potential buffer overflows.

A complete advisory provided by the OpenSSL team is available[2] in
their website.


SOLUTION
All openssl users should upgrade.

Please notice that in order to complete the upgrade process, you must
restart all running aplications that are linked to openssl libraries
after the new packages are installed. You can see a list of such
applications using the lsof utility, as seen below:

# lsof | egrep '(libcrypto|libssl)'

Services (like apache and openssh daemons) can be restarted using the
"service" command. For example:

# service httpd restart
# service openssh restart


REFERENCES:
1.http://www.darpa.mil/ito/research/chats
2.http://www.openssl.org/news/secadv_20020730.txt
3.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0655
4.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0656
5.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0657


DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/openssl-0.9.6-4U60_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/openssl-devel-0.9.6-4U60_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/openssl-0.9.6-4U60_3cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/openssl-0.9.6a-3U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/openssl-devel-0.9.6a-3U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/openssl-devel-static-0.9.6a-3U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/openssl-doc-0.9.6a-3U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/openssl-progs-0.9.6a-3U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/openssl-0.9.6a-3U70_3cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/openssl-0.9.6c-2U8_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/openssl-devel-0.9.6c-2U8_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/openssl-devel-static-0.9.6c-2U8_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/openssl-doc-0.9.6c-2U8_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/openssl-progs-0.9.6c-2U8_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/openssl-0.9.6c-2U8_1cl.src.rpm


ADDITIONAL INSTRUCTIONS
Users of Conectiva Linux version 6.0 or higher may use apt to perform
upgrades of RPM packages:
- add the following line to /etc/apt/sources.list if it is not there yet
(you may also use linuxconf to do this):

rpm [cncbr] ftp://atualizacoes.conectiva.com.br 6.0/conectiva updates

(replace 6.0 with the correct version number if you are not running CL6.0)

- run: apt-get update
- after that, execute: apt-get upgrade

Detailed instructions reagarding the use of apt and upgrade examples
can be found at http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en


- -------------------------------------------------------------------------
All packages are signed with Conectiva's GPG key. The key and instructions
on how to import it can be found at
http://distro.conectiva.com.br/seguranca/chave/?idioma=en
Instructions on how to check the signatures of the RPM packages can be
found at http://distro.conectiva.com.br/seguranca/politica/?idioma=en
- -------------------------------------------------------------------------
All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en

- -------------------------------------------------------------------------
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