CVE-2017-8821

Name of the Vulnerable Software and Affected Versions Tor versions 0.2.5 through 0.2.5.15 Tor versions 0.2.6 through 0.2.8.16 Tor versions 0.2.9 through 0.2.9.13 Tor versions 0.3.0 through 0.3.0.12 Tor versions 0.3.1 through 0.3.1.8

Description The issue allows an attacker to cause a denial of service, resulting in an application hang, by providing crafted PEM input that signifies a public key requiring a password. This triggers an attempt by the OpenSSL library to ask the user for the password.

Recommendations For Tor versions 0.2.5 through 0.2.5.15, update to version 0.2.5.16 or later. For Tor versions 0.2.6 through 0.2.8.16, update to version 0.2.8.17 or later. For Tor versions 0.2.9 through 0.2.9.13, update to version 0.2.9.14 or later. For Tor versions 0.3.0 through 0.3.0.12, update to version 0.3.0.13 or later. For Tor versions 0.3.1 through 0.3.1.8, update to version 0.3.1.9 or later.