#VU7479 Session hijacking in Tor - CVE-2017-0377
Published: July 12, 2017
Vulnerability identifier: #VU7479
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-0377
CWE-ID: CWE-384
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Tor
Tor
Software vendor:
tor.eff.org
tor.eff.org
Description
The 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.
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.
Remediation
Update to version 0.3.0.9.