CVE-2017-8821
Published: 3 December 2017
In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, an attacker can cause a denial of service (application hang) via crafted PEM input that signifies a public key requiring a password, which triggers an attempt by the OpenSSL library to ask the user for the password, aka TROVE-2017-011.
From the Ubuntu Security Team
It was discovered that Tor incorrectly handled PEM input. An attacker could possibly use this to cause a denial of service.
Priority
Status
Package | Release | Status |
---|---|---|
tor Launchpad, Ubuntu, Debian |
artful |
Released
(0.3.0.13-0ubuntu1~17.10.2)
|
bionic |
Not vulnerable
(0.3.1.9-1)
|
|
cosmic |
Not vulnerable
(0.3.1.9-1)
|
|
trusty |
Released
(0.2.4.27-1ubuntu0.1)
|
|
upstream |
Released
(0.2.9.14-1, 0.3.1.9-1)
|
|
xenial |
Released
(0.2.9.14-1ubuntu1~16.04.2)
|
|
zesty |
Ignored
(end of life)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |