Information disclosure in tor.eff Tor



| Updated: 2020-08-11
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2011-4897
CWE-ID CWE-200
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Tor
Client/Desktop applications / Web browsers

Vendor tor.eff.org

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU44433

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2011-4897

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

Tor before 0.2.2.25-alpha, when configured as a relay without the Nickname configuration option, uses the local hostname as the Nickname value, which allows remote attackers to obtain potentially sensitive information by reading this value.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Tor: 0.0.2 - 0.2.2.23

CPE2.3 External links

https://blog.torproject.org/blog/tor-02225-alpha-out


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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