CVE-2018-20840
"Google API C++ Client ID Token Handling Denial of Service Vulnerability"
Description
An unhandled exception vulnerability exists during Google Sign-In with Google API C++ Client before 2019-04-10. It potentially causes an outage of third-party services that were not designed to recover from exceptions. On the client, ID token handling can cause an unhandled exception because of misinterpretation of an integer as a string, resulting in denial-of-service and then other users can no longer login/sign-in to the affected third-party service. Once this third-party service uses Google Sign-In with google-api-cpp-client, a malicious user can trigger this client/auth/oauth2_authorization.cc vulnerability by requesting the client to receive the ID token from a Google authentication server.
INFO
Published Date :
May 30, 2019, 4:29 p.m.
Last Modified :
May 31, 2019, 4:04 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
3.9
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-2018-20840.
| URL | Resource |
|---|---|
| https://github.com/google/google-api-cpp-client/issues/57 | Issue Tracking Exploit Third Party Advisory |
| https://github.com/google/google-api-cpp-client/pull/58 | Issue Tracking Patch 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-2018-20840 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2018-20840 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]
May. 31, 2019
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:C/C:N/I:N/A:H Changed Reference Type https://github.com/google/google-api-cpp-client/issues/57 No Types Assigned https://github.com/google/google-api-cpp-client/issues/57 Exploit, Issue Tracking, Third Party Advisory Changed Reference Type https://github.com/google/google-api-cpp-client/pull/58 No Types Assigned https://github.com/google/google-api-cpp-client/pull/58 Issue Tracking, Patch, Third Party Advisory Added CWE CWE-754 Added CPE Configuration OR *cpe:2.3:a:google:api_c\+\+_client:*:*:*:*:*:*:*:* versions up to (excluding) 2019-04-10
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2018-20840 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-2018-20840
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.08 }} -0.01%
score
0.37165
percentile