6.1
MEDIUM
CVE-2023-6927
Keycloak Numeric Authorization Code Token Bypass Vulnerability
Description

A flaw was found in Keycloak. This issue may allow an attacker to steal authorization codes or tokens from clients using a wildcard in the JARM response mode "form_post.jwt" which could be used to bypass the security patch implemented to address CVE-2023-6134.

INFO

Published Date :

Dec. 18, 2023, 11:15 p.m.

Last Modified :

Feb. 14, 2024, 3:15 a.m.

Remotely Exploitable :

Yes !

Impact Score :

2.7

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2023-6927 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 Redhat keycloak
2 Redhat single_sign-on

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-2023-6927 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2023-6927 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]

    Jun. 12, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Jun. 12, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Feb. 14, 2024

    Action Type Old Value New Value
    Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:0798 [No types assigned]
    Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:0799 [No types assigned]
    Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:0800 [No types assigned]
    Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:0801 [No types assigned]
    Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:0804 [No types assigned]
  • CVE Modified by [email protected]

    Jan. 09, 2024

    Action Type Old Value New Value
    Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:0094 [No types assigned]
    Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:0095 [No types assigned]
    Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:0096 [No types assigned]
    Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:0097 [No types assigned]
    Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:0098 [No types assigned]
    Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:0100 [No types assigned]
    Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:0101 [No types assigned]
  • Initial Analysis by [email protected]

    Dec. 22, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    Changed Reference Type https://access.redhat.com/security/cve/CVE-2023-6927 No Types Assigned https://access.redhat.com/security/cve/CVE-2023-6927 Vendor Advisory
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2255027 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2255027 Issue Tracking, Vendor Advisory
    Added CWE NIST CWE-601
    Added CPE Configuration OR *cpe:2.3:a:redhat:keycloak:-:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*
  • CVE Received by [email protected]

    Dec. 18, 2023

    Action Type Old Value New Value
    Added Description A flaw was found in Keycloak. This issue may allow an attacker to steal authorization codes or tokens from clients using a wildcard in the JARM response mode "form_post.jwt" which could be used to bypass the security patch implemented to address CVE-2023-6134.
    Added Reference Red Hat, Inc. https://access.redhat.com/security/cve/CVE-2023-6927 [No types assigned]
    Added Reference Red Hat, Inc. https://bugzilla.redhat.com/show_bug.cgi?id=2255027 [No types assigned]
    Added CWE Red Hat, Inc. CWE-601
    Added CVSS V3.1 Red Hat, Inc. AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
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-2023-6927 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-2023-6927 weaknesses.

Exploit Prediction

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

0.17 }} 0.02%

score

0.54875

percentile

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