5.3
MEDIUM
CVE-2021-28090
Tor Directory Authority Denial of Service Assertion Failure
Description

Tor before 0.4.5.7 allows a remote attacker to cause Tor directory authorities to exit with an assertion failure, aka TROVE-2021-002.

INFO

Published Date :

March 19, 2021, 5:15 a.m.

Last Modified :

Nov. 7, 2023, 3:32 a.m.

Remotely Exploitable :

Yes !

Impact Score :

1.4

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2021-28090 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Fedoraproject fedora
1 Torproject tor
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-2021-28090.

URL Resource
https://blog.torproject.org/node/2009 Release Notes Vendor Advisory
https://bugs.torproject.org/tpo/core/tor/40316 Vendor Advisory
https://gitlab.torproject.org/tpo/core/tor/-/issues/40316 Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/
https://security.gentoo.org/glsa/202107-25 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).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-28090 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-28090 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
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/ [No types assigned]
    Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/
  • CWE Remap by [email protected]

    Jun. 28, 2022

    Action Type Old Value New Value
    Changed CWE NVD-CWE-noinfo CWE-617
  • Modified Analysis by [email protected]

    May. 16, 2022

    Action Type Old Value New Value
    Changed Reference Type https://security.gentoo.org/glsa/202107-25 No Types Assigned https://security.gentoo.org/glsa/202107-25 Third Party Advisory
  • CVE Modified by [email protected]

    Jul. 10, 2021

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/202107-25 [No Types Assigned]
  • Initial Analysis by [email protected]

    Mar. 25, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
    Changed Reference Type https://blog.torproject.org/node/2009 No Types Assigned https://blog.torproject.org/node/2009 Release Notes, Vendor Advisory
    Changed Reference Type https://bugs.torproject.org/tpo/core/tor/40316 No Types Assigned https://bugs.torproject.org/tpo/core/tor/40316 Vendor Advisory
    Changed Reference Type https://gitlab.torproject.org/tpo/core/tor/-/issues/40316 No Types Assigned https://gitlab.torproject.org/tpo/core/tor/-/issues/40316 Vendor Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/ Mailing List, Third Party Advisory
    Added CWE NIST NVD-CWE-noinfo
    Added CPE Configuration OR *cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:* versions up to (excluding) 0.3.5.14 *cpe:2.3:a:torproject:tor:0.4.4.0:alpha:*:*:*:*:*:* *cpe:2.3:a:torproject:tor:0.4.4.1:alpha:*:*:*:*:*:* *cpe:2.3:a:torproject:tor:0.4.4.2:alpha:*:*:*:*:*:* *cpe:2.3:a:torproject:tor:0.4.4.3:alpha:*:*:*:*:*:* *cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:* versions from (including) 0.4.4.4 up to (excluding) 0.4.4.8 *cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:* versions from (including) 0.4.5.0 up to (excluding) 0.4.5.7
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Mar. 24, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/ [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-28090 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-2021-28090 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.27 }} 0.03%

score

0.64438

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability