CVE-2018-20840

N/A
Published: May 30, 2019 at 03:58 PM UTC
Updated: June 17, 2026 at 01:53 AM UTC
1 product affected across 1 vendorAPI C++ Client

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Severity
N/A
Exploit prediction
EPSS 0.7%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2019-04-10
Affected range stops below 2019-04-10, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

x_refsource_MISCExploitIssue TrackingThird Party Advisory
https://github.com/google/google-api-cpp-client/issues/57
x_refsource_MISCIssue TrackingPatchThird Party Advisory
https://github.com/google/google-api-cpp-client/pull/58

CVSS

Confidentiality
NONE
Integrity
NONE
Availability
PARTIAL
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-754

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