CVE-2005-2643

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2005-08-23 · updated 2026-06-16

Description

Tor 0.1.0.13 and earlier, and experimental versions 0.1.1.4-alpha and earlier, does not reject certain weak keys when using ephemeral Diffie-Hellman (DH) handshakes, which allows malicious Tor servers to obtain the keys that a client uses for other systems in the circuit.

Affected products

Tor: 0.0.9, 0.0.9.1, 0.0.9.2, 0.0.9.3, 0.0.9.4, 0.0.9.5 (+21)

References

http://archives.seul.org/or/announce/Aug-2005/msg00002.html
http://marc.info/?l=bugtraq&m=112448002732443&w=2
http://secunia.com/advisories/16424
http://securitytracker.com/id?1014739
http://archives.seul.org/or/announce/Aug-2005/msg00002.html
http://marc.info/?l=bugtraq&m=112448002732443&w=2
http://secunia.com/advisories/16424
http://securitytracker.com/id?1014739

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