Executive Summary

Informations
Name CVE-2020-26236 First vendor Publication 2020-11-20
Vendor Cve Last vendor Modification 2020-11-20

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

In ScratchVerifier before commit a603769, an attacker can hijack the verification process to log into someone else's account on any site that uses ScratchVerifier for logins. A possible exploitation would follow these steps: 1. User starts login process. 2. Attacker attempts login for user, and is given the same verification code. 3. User comments code as part of their normal login. 4. Before user can, attacker completes the login process now that the code is commented. 5. User gets a failed login and attacker now has control of the account. Since commit a603769 starting a login twice will generate different verification codes, causing both user and attacker login to fail. For clients that rely on a clone of ScratchVerifier not hosted by the developers, their users may attempt to finish the login process as soon as possible after commenting the code. There is no reliable way for the attacker to know before the user can finish the process that the user has commented the code, so this vulnerability only really affects those who comment the code and then take several seconds before finishing the login.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26236

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-287 Improper Authentication

Sources (Detail)

Source Url
CONFIRM https://github.com/ScratchVerifier/ScratchVerifier/security/advisories/GHSA-9...
MISC https://github.com/ScratchVerifier/ScratchVerifier/commit/a603769010abf8c1bed...

Alert History

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0
1
Date Informations
2020-11-21 00:22:50
  • Multiple Updates
2020-11-20 21:23:25
  • First insertion