Hi, all!
There's a new Tor release (0.3.0.7) available on the website. It fixes a bug affecting relays running earlier versions of 0.3.0.x that could allow attackers to trigger an assertion failure on those relays. Clients are not affected; neither are relays running versions before 0.3.0.x.
If you're running a relay with one of the affected versions, you should upgrade. Source is available on the website now; packages should be available over the next several days.
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Changes in version 0.3.0.7 - 2017-05-15 Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions of Tor 0.3.0.x, where an attacker could cause a Tor relay process to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade; clients are not affected.
o Major bugfixes (hidden service directory, security): - Fix an assertion failure in the hidden service directory code, which could be used by an attacker to remotely cause a Tor relay process to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade. should upgrade. This security issue is tracked as TROVE-2017-002. Fixes bug 22246; bugfix on 0.3.0.1-alpha.
o Minor features: - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2 Country database.
o Minor features (future-proofing): - Tor no longer refuses to download microdescriptors or descriptors if they are listed as "published in the future". This change will eventually allow us to stop listing meaningful "published" dates in microdescriptor consensuses, and thereby allow us to reduce the resources required to download consensus diffs by over 50%. Implements part of ticket 21642; implements part of proposal 275.
o Minor bugfixes (Linux seccomp2 sandbox): - The getpid() system call is now permitted under the Linux seccomp2 sandbox, to avoid crashing with versions of OpenSSL (and other libraries) that attempt to learn the process's PID by using the syscall rather than the VDSO code. Fixes bug 21943; bugfix on 0.2.5.1-alpha.