Adam’s Blog

Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
again on the latest OS X, and updates the location of a directory
authority.

Tor 0.2.1.24 makes Tor work again on the latest OS X — this time
for sure!

The Windows and OS X bundles also come with a newer version of Polipo
that fixes some stability and security problems.

People using Tor as a client should upgrade:
https://www.torproject.org/easy-download

Changes in version 0.2.1.23 – 2010-02-13
 o Major bugfixes (performance):
   - We were selecting our guards uniformly at random, and then weighting
     which of our guards we’d use uniformly at random. This imbalance
     meant that Tor clients were severely limited on throughput (and
     probably latency too) by the first hop in their circuit. Now we
     select guards weighted by currently advertised bandwidth. We also
     automatically discard guards picked using the old algorithm. Fixes
     bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.

 o Major bugfixes:
   - Make Tor work again on the latest OS X: when deciding whether to
     use strange flags to turn TLS renegotiation on, detect the OpenSSL
     version at run-time, not compile time. We need to do this because
     Apple doesn’t update its dev-tools headers when it updates its
     libraries in a security patch.
   - Fix a potential buffer overflow in lookup_last_hid_serv_request()
     that could happen on 32-bit platforms with 64-bit time_t. Also fix
     a memory leak when requesting a hidden service descriptor we’ve
     requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
     by aakova.

 o Minor bugfixes:
   - Refactor resolve_my_address() to not use gethostbyname() anymore.
     Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.

 o Minor features:
   - Avoid a mad rush at the beginning of each month when each client
     rotates half of its guards. Instead we spread the rotation out
     throughout the month, but we still avoid leaving a precise timestamp
     in the state file about when we first picked the guard. Improves
     over the behavior introduced in 0.1.2.17.

Changes in version 0.2.1.24 – 2010-02-21
 o Minor bugfixes:
   - Work correctly out-of-the-box with even more vendor-patched versions
     of OpenSSL. In particular, make it so Debian and OS X don’t need
     customized patches to run/build.