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| author | Nick Mathewson <nickm@torproject.org> | 2017-01-02 14:55:39 -0500 |
|---|---|---|
| committer | Nick Mathewson <nickm@torproject.org> | 2017-01-18 08:55:57 -0500 |
| commit | 609065f165a8e145f404e55e01e8f5ac5c013bc3 (patch) | |
| tree | ed8b9f428dff2ba3491e85c52caee3ec80eb2ba1 /changes | |
| parent | c27ae62adefb9fcdf468eef43e8a33ae3657a6bf (diff) | |
| download | tor-609065f165a8e145f404e55e01e8f5ac5c013bc3.tar.gz tor-609065f165a8e145f404e55e01e8f5ac5c013bc3.zip | |
DefecTor countermeasure: change server- and client-side DNS TTL clipping
The server-side clipping now clamps to one of two values, both
for what to report, and how long to cache.
Additionally, we move some defines to dns.h, and give them better
names.
Diffstat (limited to 'changes')
| -rw-r--r-- | changes/ticket19769 | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/changes/ticket19769 b/changes/ticket19769 new file mode 100644 index 0000000000..9fc05c3e9e --- /dev/null +++ b/changes/ticket19769 @@ -0,0 +1,7 @@ + o Major features (security): + - Change the algorithm used to decide DNS TTLs on client and server side, + to better resist DNS-based correlation attacks like the DefecTor attack + of Greschbach, Pulls, Roberts, Winter, and Feamster). Now + relays only return one of two possible DNS TTL values, and clients + are willing to believe DNS TTL values up to 3 hours long. + Closes ticket 19769. |