OpenSSL Vulnerability – The Heartbleed Bug

The OpenSSL team recently published a security advisory regarding the TLS heartbeat read overrun. This vulnerability allows up to 64k of memory to be read by a connected client or server in chunks and different chunks can be requested on each attack.

The vulnerability affects versions 1.0.1 and 1.0.2-beta of OpenSSL.

The WANdisco SVN binaries for Windows and Solaris available since 2011 have included OpenSSL libraries which are vulnerable. We’ve released updated versions with the patch as of today, so if you are still using one of these older versions please download the latest:



Users of our Subversion products (including SVN Multisite) on other operating systems will still need to ensure they’ve updated their OpenSSL package however there’s nothing vulnerable included with our binaries. We recommend all users of these operating systems update their version of OpenSSL to 1.0.1g as soon as possible or, if unable to update, recompile OpenSSL with the -DOPENSSL_NO_HEARTBEATS flag.

For more information on this vulnerability please see

UPDATE: SmartSVN versions 8.5 and 8.5.1 are also vulnerable due to the included version of OpenSSL. We’ve now released SmartSVN 8.5.2 and would urge all users of SmartSVN 8.5 and 8.5.1 to update to this latest version as soon as possible. SmartSVN 8.5.2 is available for download at

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