instant messenger

Tor Messenger 0.5.0b1 is released

This release features important improvements to the stability and security of Tor Messenger. All users are encouraged to upgrade.

27 comments

Tor Messenger 0.4.0b3 is released

We are pleased to announce another public beta release of Tor Messenger.

15 comments

Tor Messenger 0.4.0b2 is released

We are pleased to announce another public beta release of Tor Messenger. This release features important improvements to the stability and security of Tor Messenger.

26 comments

Tor Messenger 0.4.0b1 is released

We are pleased to announce another public beta release of Tor Messenger. This release features important improvements to the stability and security of Tor Messenger.

36 comments

Tor Messenger 0.3.0b2 is released

We are pleased to announce another public beta release of Tor Messenger. This release features important improvements to the stability and security of Instantbird.

39 comments

Tor Messenger 0.3.0b1 is released

We are pleased to announce another public beta release of Tor Messenger. This release features important improvements to the stability and security of Instantbird.

64 comments

Tor Messenger 0.2.0b2 is released

We are pleased to announce another public beta release of Tor Messenger. This release features a secure automatic updater and important security fixes to Instantbird.

71 comments

Tor Messenger 0.1.0b6 is released

We are pleased to announce another public beta release of Tor Messenger.

11 comments

Tor Messenger 0.1.0b5 is released

We are pleased to announce another public beta release of Tor Messenger.

93 comments

Tor Messenger 0.1.0b4 is released

We are pleased to announce another public beta release of Tor Messenger.

39 comments

Upcoming Events

July 13, 2020 - July 17, 2020

Privacy Enhancing Technologies Symposium (online!)

July 27, 2020 - July 31, 2020

Rightscon online

August 11, 2020 - August 18, 2020

Bornhack (DK)

August 12, 2020 - August 14, 2020

Walking Onions @ USENIX Security Symposium '20

See All Upcoming Events

Recent Updates

#MoreOnionsPorfavor: Onionize your website and take back the internet

Starting today, July 8th, the Tor Project is running a one month campaign called #MoreOnionsPorfavor to raise awareness about onion sites, that is, websites

New releases: Tor 0.3.5.11, 0.4.2.8, and 0.4.3.6 (with security fixes)

We have new stable releases today. If you build Tor from source, you can download the source code for 0.4.3.6 on the website. Packages should be available within the next several weeks, with a new Tor Browser by the end of the month.

There are also updated versions for older supported series. You can download 0.3.5.11 and 0.4.2.8 at https://dist.torproject.org/.

These releases fix TROVE-2020-001, a medium-severity denial of service vulnerability affecting all versions of Tor when compiled with the NSS encryption library. (This is not the default configuration.) Using this vulnerability, an attacker could cause an affected Tor instance to crash remotely. This issue is also tracked as CVE-2020- 15572. Anybody running a version of Tor built with the NSS library should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha or later. (If you are running a version of Tor built with OpenSSL, this bug does not affect your installation.)

Tor 0.4.3.6 backports several bugfixes from later releases, including some affecting usability. Below are the changes in 0.4.3.6. You can also read the changes in 0.3.5.11 and the changes in 0.4.2.8.

Changes in version 0.4.3.6 - 2020-07-09

Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
- Fix a crash due to an out-of-bound memory access when Tor is compiled with NSS support. Fixes bug 33119; bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001 and CVE-2020-15572.
Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
- Use the correct 64-bit printf format when compiling with MINGW on Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.

New alpha release: Tor 0.4.4.2-alpha

There's a new alpha release available for download. If you build Tor from source, you can download the source code for 0.4.4.2-alpha from the download page on the website. Packages should be available over the coming weeks, with a new alpha Tor Browser release around the end of the month.

Remember, this is an alpha release: you should only run this if you'd like to find and report more bugs than usual.

This is the second alpha release in the 0.4.4.x series. It fixes a few bugs in the previous release, and solves a few usability, compatibility, and portability issues.

This release also fixes TROVE-2020-001, a medium-severity denial of service vulnerability affecting all versions of Tor when compiled with the NSS encryption library. (This is not the default configuration.) Using this vulnerability, an attacker could cause an affected Tor instance to crash remotely. This issue is also tracked as CVE-2020- 15572. Anybody running a version of Tor built with the NSS library should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha or later. If you're running with OpenSSL, this bug doesn't affect your Tor.

Changes in version 0.4.4.2-alpha - 2020-07-09

Major bugfixes (NSS, security):
- Fix a crash due to an out-of-bound memory access when Tor is compiled with NSS support. Fixes bug 33119; bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001 and CVE-2020-15572.
Minor features (bootstrap reporting):
- Report more detailed reasons for bootstrap failure when the failure happens due to a TLS error. Previously we would just call these errors "MISC" when they happened during read, and "DONE" when they happened during any other TLS operation. Closes ticket 32622.

Anti-censorship team report: June 2020

Tor's anti-censorship team writes monthly reports to keep the world updated on its progress. This blog post summarizes the anti-censorship work we got done in June 2020.