[ANNOUNCEMENT] Updated: openssl-0.9.8g-1, openssl-devel-0.9.8g-1

Corinna Vinschen corinna-cygwin@cygwin.com
Fri Oct 19 12:25:00 GMT 2007

I've updated the version of OpenSSL to 0.9.8g-1.  This also includes the
openssl-devel package.

This is an upstream security and bugfix release.  The Cygwin release is
the vanilla version, no additional patches.

The previous version, 0.9.8f, has been release a week ago, 11-Oct-2007.
It was a security and bugfix release, but for some reason no official
announcement has been sent, only a list of vulnerabilities fixed in

The official announcement for 0.9.8g does not contain any hint about the
security fixes applied to the 0.9.8f version.  For that reason you will
find below the official release message for 0.9.8g, as well as the list
of vulnerabilities fixed in 0.9.8f.

OpenSSL Security Advisory [12-Oct-2007]
OpenSSL Vulnerabilities

Vulnerability A

Andy Polyakov discovered a flaw in OpenSSL's DTLS implementation which
could lead to the compromise of clients and servers with DTLS enabled.

DTLS is a datagram variant of TLS specified in RFC 4347 first
supported in OpenSSL version 0.9.8. Note that the vulnerabilities do
not affect SSL and TLS so only clients and servers explicitly using
DTLS are affected.

We believe this flaw will permit remote code execution.

This vulnerability is tracked as CVE-2007-4995.

Versions Affected

All releases of 0.9.8 prior to 0.9.8f.



a) Upgrade to the latest version of OpenSSL (0.9.8f) and rebuild all
packages using OpenSSL for DTLS.


b) Disable DTLS.

Vulnerability B

Moritz Jodeit found an off-by-one error in SSL_get_shared_ciphers(), a
function that should normally only be used for logging or debugging.

The impact of this overflow is unclear.

This vulnerability is tracked as CVE-2007-5135.

Versions Affected

All releases of 0.9.8 prior to 0.9.8f. All releases of 0.9.7 prior to

(Note that versions prior to 0.9.8d and 0.9.7l actually had a worse
problem in the same function).


a) Don't use SSL_get_shared_ciphers().


b) Upgrade to 0.9.8f.

Official release message:
   OpenSSL - The Open Source toolkit for SSL/TLS

   The OpenSSL project team is pleased to announce the release of
   version 0.9.8g of our open source toolkit for SSL/TLS. This new
   OpenSSL version is a bugfix release. For a complete list of changes,
   please see

   We consider OpenSSL 0.9.8g to be the best version of OpenSSL
   available and we strongly recommend that users of older versions
   upgrade as soon as possible. OpenSSL 0.9.8g is available for
   download via HTTP and FTP from the following master locations (you
   can find the various FTP mirrors under

     * http://www.openssl.org/source/
     * ftp://ftp.openssl.org/source/

   The distribution file names are:

    o openssl-0.9.8g.tar.gz
      MD5 checksum: acf70a16359bf3658bdfb74bda1c4419
      SHA1 checksum: 4e9c5ced466715d18fd924de79bde5c15da80fa1

   The checksums were calculated using the following commands:

    openssl md5 openssl-0.9.*.tar.gz
    openssl sha1 openssl-0.9.*.tar.gz

   The OpenSSL Project Team...

    Mark J. Cox             Nils Larsch         Ulf Möller
    Ralf S. Engelschall     Ben Laurie          Andy Polyakov
    Dr. Stephen Henson      Richard Levitte     Geoff Thorpe
    Lutz Jänicke            Bodo Möller

To update your installation, click on the "Install Cygwin now" link on
the http://cygwin.com/ web page.  This downloads setup.exe to your
system.  Then, run setup and answer all of the questions.


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Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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