Description
TLS handshakes in Tor before 0.1.1.20 generate public-private keys based on TLS context rather than the connection, which makes it easier for remote attackers to conduct brute force attacks on the encryption keys.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | tor | 0.1.1.20-1 | — |
| Debian 13 | tor | 0.1.1.20-1 | — |
| Debian 12 | tor | 0.1.1.20-1 | — |
References
- 25876 vdb-entry
- 20514 third-party-advisory
- GLSA-200606-04 vendor-advisory
- http://tor.eff.org/cvs/tor/ChangeLog