Information disclosure in Tor - CVE-2017-0380
Published: October 9, 2017 / Updated: October 17, 2017
Vulnerability identifier: #VU8851
CSH Severity: Low
CVSS v4.0: 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-2017-0380
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: tor.eff.org
Affected software:
Tor
Tor
Detailed vulnerability description
The vulnerability allows a remote attacker to obtain potentially sensitive information.
The vulnerability exists in the rend_service_intro_established() function in 'or/rendservice.c due to the system may log uninitialized stack contents when a certain hidden service error occurs while SafeLogging is disabled. A remote attacker can use an error message about the construction of an introduction point circuit and gain access to potentially sensitive information from uninitialized stack memory.
How to mitigate CVE-2017-0380
The vulnerability is addressed in the following versions: 0.2.8.15, 0.2.9.12, 0.3.0.11.