CVE-2011-4894

Published: Dec 23, 2011Updated: Apr 29, 2026 Sources: CVE List NVDCWE-200

NVD MITRE

4.3CVSSMEDIUM

EPSS Score

Description

Tor before 0.2.2.34, when configured as a bridge, uses direct DirPort access instead of a Tor TLS connection for a directory fetch, which makes it easier for remote attackers to enumerate bridges by observing DirPort connections.

CVSS Vector Breakdown

Exploitability

AV:NAccess Vector

Network

AC:MAccess Complexity

Medium

Au:NAuthentication

None

Impact

C:PConfidentiality

Partial

I:NIntegrity

None

A:NAvailability

None

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Weaknesses

CWE-200

Affected Products

n/a n/a

tor tor

Mixed

Security Products / secure-gateway-vpn

toross-projectSecurity Productsaka tor project

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique

Collection

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References

https://blog.torproject.org/blog/tor-02234-released-security-patches

blog.torproject.org

Timeline

Published

Dec 23, 2011

Last Updated

Apr 29, 2026

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