CVE-2017-8821
"Tor OpenSSL Public Key Password Denial of Service Vulnerability"
Description
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.
INFO
Published Date :
Dec. 3, 2017, 7:29 a.m.
Last Modified :
Dec. 21, 2017, 6:06 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2017-8821 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2017-8821.
| URL | Resource |
|---|---|
| https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516 | Vendor Advisory |
| https://bugs.torproject.org/24246 | Vendor Advisory |
| https://www.debian.org/security/2017/dsa-4054 | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2017-8821 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2017-8821 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Dec. 21, 2017
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516 No Types Assigned https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516 Vendor Advisory Changed Reference Type https://bugs.torproject.org/24246 No Types Assigned https://bugs.torproject.org/24246 Vendor Advisory Changed Reference Type https://www.debian.org/security/2017/dsa-4054 No Types Assigned https://www.debian.org/security/2017/dsa-4054 Third Party Advisory Added CWE CWE-119 Added CPE Configuration OR *cpe:2.3:a:tor_project:tor:*:*:*:*:*:*:*:* versions up to (excluding) 0.2.5.16 *cpe:2.3:a:tor_project:tor:*:*:*:*:*:*:*:* versions from (including) 0.2.6 up to (excluding) 0.2.8.17 *cpe:2.3:a:tor_project:tor:*:*:*:*:*:*:*:* versions from (including) 0.2.9 up to (excluding) 0.2.9.14 *cpe:2.3:a:tor_project:tor:*:*:*:*:*:*:*:* versions from (including) 0.3.0 up to (excluding) 0.3.0.13 *cpe:2.3:a:tor_project:tor:*:*:*:*:*:*:*:* versions from (including) 0.3.1 up to (excluding) 0.3.1.9 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Dec. 05, 2017
Action Type Old Value New Value Added Reference https://www.debian.org/security/2017/dsa-4054 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2017-8821 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2017-8821
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.26 }} 0.00%
score
0.61857
percentile