CVE-2005-2643

Name: CVE-2005-2643
Creator: NVD / NIST
Published: 2005-08-23T04:00:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.25%

Last modified Jun 16, 2026

CVE-2005-2643 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.25% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

1.25%

65.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Tor	Tor	0.0.9
Tor	Tor	0.0.9.1
Tor	Tor	0.0.9.2
Tor	Tor	0.0.9.3
Tor	Tor	0.0.9.4
Tor	Tor	0.0.9.5
Tor	Tor	0.0.9.6
Tor	Tor	0.0.9.7
Tor	Tor	0.0.9.8
Tor	Tor	0.0.9.9
Tor	Tor	0.1.0.1
Tor	Tor	0.1.0.2
Tor	Tor	0.1.0.3
Tor	Tor	0.1.0.4
Tor	Tor	0.1.0.5
Tor	Tor	0.1.0.6
Tor	Tor	0.1.0.7
Tor	Tor	0.1.0.8
Tor	Tor	0.1.0.9
Tor	Tor	0.1.0.10
Tor	Tor	0.1.0.11
Tor	Tor	0.1.0.12
Tor	Tor	0.1.0.13
Tor	Tor	0.1.1.1_alpha
Tor	Tor	0.1.1.2_alpha
Tor	Tor	0.1.1.3_alpha
Tor	Tor	0.1.1.4_alpha

References

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

Timeline

Published: Aug 23, 2005
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2005-2643?

How severe is CVE-2005-2643?

Severity scoring for CVE-2005-2643 is pending analysis. The EPSS model estimates a 1.25% probability of exploitation in the next 30 days.

How do I fix CVE-2005-2643?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2005-2643?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST