4.1
MEDIUM
CVE-2020-8150
Nextcloud Server Cryptographic Downgrade Vulnerability
Description

A cryptographic issue in Nextcloud Server 19.0.1 allowed an attacker to downgrade the encryption scheme and break the integrity of encrypted files.

INFO

Published Date :

Nov. 9, 2020, 3:15 p.m.

Last Modified :

May 24, 2022, 5:13 p.m.

Source :

[email protected]

Remotely Exploitable :

No

Impact Score :

3.6

Exploitability Score :

0.5
Public PoC/Exploit Available at Github

CVE-2020-8150 has a 3 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2020-8150 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 Nextcloud nextcloud_server
: Total Affected Vendor : 1 | Products : 1
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-2020-8150.

URL Resource
http://seclists.org/fulldisclosure/2020/Dec/55 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2020/Dec/57 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2020/Dec/58 Mailing List Third Party Advisory
https://hackerone.com/reports/742588 Exploit Third Party Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2020-039 Vendor 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).

Profile Photo
xbl2022/awesome-hacking-lists

None

Updated: 2 years, 4 months ago
0 stars 0 fork 0 watcher
Born at : April 30, 2022, 6:06 p.m. This repo has been linked 55 different CVEs too.
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0xT11/CVE-POC

None

Updated: 1 month ago
82 stars 32 fork 32 watcher
Born at : Oct. 2, 2020, 2:49 p.m. This repo has been linked 1111 different CVEs too.
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geffner/CVE-2020-8289

CVE-2020-8289 – Remote Code Execution as SYSTEM/root via Backblaze

Updated: 2 years, 3 months ago
11 stars 1 fork 1 watcher
Born at : Sept. 9, 2020, 2:39 p.m. This repo has been linked 2 different CVEs too.

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

The following list is the news that have been mention CVE-2020-8150 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-8150 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
  • Modified Analysis by [email protected]

    May. 24, 2022

    Action Type Old Value New Value
    Changed Reference Type http://seclists.org/fulldisclosure/2020/Dec/55 No Types Assigned http://seclists.org/fulldisclosure/2020/Dec/55 Mailing List, Third Party Advisory
    Changed Reference Type http://seclists.org/fulldisclosure/2020/Dec/57 No Types Assigned http://seclists.org/fulldisclosure/2020/Dec/57 Mailing List, Third Party Advisory
    Changed Reference Type http://seclists.org/fulldisclosure/2020/Dec/58 No Types Assigned http://seclists.org/fulldisclosure/2020/Dec/58 Mailing List, Third Party Advisory
  • CVE Modified by [email protected]

    Dec. 29, 2020

    Action Type Old Value New Value
    Added Reference http://seclists.org/fulldisclosure/2020/Dec/58 [No Types Assigned]
    Added Reference http://seclists.org/fulldisclosure/2020/Dec/57 [No Types Assigned]
  • CVE Modified by [email protected]

    Dec. 26, 2020

    Action Type Old Value New Value
    Added Reference http://seclists.org/fulldisclosure/2020/Dec/55 [No Types Assigned]
  • Initial Analysis by [email protected]

    Nov. 18, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:N/I:P/A:N)
    Added CVSS V3.1 NIST AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
    Changed Reference Type https://hackerone.com/reports/742588 No Types Assigned https://hackerone.com/reports/742588 Exploit, Third Party Advisory
    Changed Reference Type https://nextcloud.com/security/advisory/?id=NC-SA-2020-039 No Types Assigned https://nextcloud.com/security/advisory/?id=NC-SA-2020-039 Vendor Advisory
    Added CWE NIST CWE-311
    Added CPE Configuration OR *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* versions up to (excluding) 19.0.2
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-2020-8150 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-2020-8150 weaknesses.

CAPEC-31: Accessing/Intercepting/Modifying HTTP Cookies Accessing/Intercepting/Modifying HTTP Cookies CAPEC-37: Retrieve Embedded Sensitive Data Retrieve Embedded Sensitive Data CAPEC-65: Sniff Application Code Sniff Application Code CAPEC-157: Sniffing Attacks Sniffing Attacks CAPEC-158: Sniffing Network Traffic Sniffing Network Traffic CAPEC-204: Lifting Sensitive Data Embedded in Cache Lifting Sensitive Data Embedded in Cache CAPEC-383: Harvesting Information via API Event Monitoring Harvesting Information via API Event Monitoring CAPEC-384: Application API Message Manipulation via Man-in-the-Middle Application API Message Manipulation via Man-in-the-Middle CAPEC-385: Transaction or Event Tampering via Application API Manipulation Transaction or Event Tampering via Application API Manipulation CAPEC-386: Application API Navigation Remapping Application API Navigation Remapping CAPEC-387: Navigation Remapping To Propagate Malicious Content Navigation Remapping To Propagate Malicious Content CAPEC-388: Application API Button Hijacking Application API Button Hijacking CAPEC-477: Signature Spoofing by Mixing Signed and Unsigned Content Signature Spoofing by Mixing Signed and Unsigned Content CAPEC-609: Cellular Traffic Intercept Cellular Traffic Intercept
Exploit Prediction

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

0.05 }} 0.00%

score

0.19144

percentile

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