Risk | Low |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2017-0377 |
CWE-ID | CWE-384 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
Tor Client/Desktop applications / Web browsers |
Vendor | tor.eff.org |
Security Bulletin
This security bulletin contains one low risk vulnerability.
EUVDB-ID: #VU7479
Risk: Low
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-0377
CWE-ID:
CWE-384 - Session Fixation
Exploit availability: No
DescriptionThe vulnerability allows a remote unauthenticated user to hijack the target user's session.
The weakness exists due to guard-selection algorithm only considers the exit relay (not the exit relay's family). A remote attacker can leverage the existence of large families, defeat intended anonymity properties and steal the victim's session.
Update to version 0.3.0.9.
Tor: 0.3.0.0 - 0.3.0.8
External linkshttp://trac.torproject.org/projects/tor/ticket/22753
http://blog.torproject.org/blog/tor-0309-released-security-update-clients
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.