CVE-2017-8820
Publication date 3 December 2017
Last updated 24 July 2024
Ubuntu priority
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, remote attackers can cause a denial of service (NULL pointer dereference and application crash) against directory authorities via a malformed descriptor, aka TROVE-2017-010.
From the Ubuntu Security Team
ebarretto> The problematic code was introduced in 0.2.9.4-alpha
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| tor | ||
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Fixed 0.2.9.14-1ubuntu1~16.04.2
|
|
| 14.04 LTS trusty |
Not affected
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| 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 |