CVE Tools
Sign in

CVE-2011-2768

Published: Dec 23, 2011Updated: Apr 29, 2026 Sources: CVE List NVDCWE-264
5.8MEDIUM
NVD MITRE
EPSS Score
0.8%
Top 49.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Tor before 0.2.2.34, when configured as a client or bridge, sends a TLS certificate chain as part of an outgoing OR connection, which allows remote relays to bypass intended anonymity properties by reading this chain and then determining the set of entry guards that the client or bridge had selected.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:MAu:NC:PI:PA:N
Exploitability
AV:NAccess Vector
Network
AC:MAccess Complexity
Medium
Au:NAuthentication
None
Impact
C:PConfidentiality
Partial
I:PIntegrity
Partial
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-264

Affected Products

tor
oss-projectaka tor project
torMixed
Security Products / secure-gateway-vpn
and 1 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2011-2768?We can run the check for you — a free external exposure review, no install. Check my exposure

References

http://www.debian.org/security/2011/dsa-2331
debian.org
https://blog.torproject.org/blog/tor-02234-released-security-patches
blog.torproject.org
News mentions
Could not load news mentions.

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2011-2768 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows