commit 6e5486b11ac113ab7cf42d167dd5555b5916ddbc Author: Roger Dingledine arma@torproject.org Date: Sun May 21 02:05:32 2017 -0400

dir auths reject 0.2.9.x for x<5, due to bug 20499

Directory authorities now reject relays running versions 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays suffer from bug 20499 and don't keep their consensus cache up-to-date.

Resolves ticket 20509. --- changes/bug20509 | 5 +++++ src/or/dirserv.c | 11 +++++++++++ 2 files changed, 16 insertions(+)

diff --git a/changes/bug20509 b/changes/bug20509 new file mode 100644 index 0000000..a39ca9f --- /dev/null +++ b/changes/bug20509 @@ -0,0 +1,5 @@ + o Minor features: + - Directory authorities now reject relays running versions + 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays + suffer from bug 20499 and don't keep their consensus cache + up-to-date. Resolves ticket 20509. diff --git a/src/or/dirserv.c b/src/or/dirserv.c index fa3938b..fedbe51 100644 --- a/src/or/dirserv.c +++ b/src/or/dirserv.c @@ -383,6 +383,17 @@ dirserv_get_status_impl(const char *id_digest, const char *nickname, return FP_REJECT; }

+ /* Tor 0.2.9.x where x<5 suffers from bug #20499, where relays don't + * keep their consensus up to date so they make bad guards. + * The simple fix is to just drop them from the network. */ + if (platform && + tor_version_as_new_as(platform,"0.2.9.0-alpha") && + !tor_version_as_new_as(platform,"0.2.9.5-alpha")) { + if (msg) + *msg = "Tor version contains bug 20499. Please upgrade!"; + return FP_REJECT; + } + status_by_digest = digestmap_get(fingerprint_list->status_by_digest, id_digest); if (status_by_digest)