High severity · published Apr 25, 2024
CVE-2023-6787
Keycloak: session hijacking via re-authentication
8.8
CVSS
0.7%
EPSS
No
On KEV
Description
A flaw was found in Keycloak that occurs from an error in the re-authentication mechanism within org.keycloak.authentication. This flaw allows hijacking an active Keycloak session by triggering a new authentication process with the query parameter "prompt=login," prompting the user to re-enter their credentials. If the user cancels this re-authentication by selecting "Restart login," an account takeover may occur, as the new session, with a different SUB, will possess the same SID as the previous session.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Single Sign-On 7 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat build of Keycloak 22 · Red Hat
All versions, or not specified · source: vendor
BO
Build OF Keycloak · Redhat
All versions, or not specified · source: NVD
KE
Keycloak · Redhat
before 22.0.10; 23.0.0 before 24.0.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-6787
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-6787
Vendor Advisory
https://access.redhat.com/errata/RHSA-2024:1867
Vendor Advisory
https://access.redhat.com/errata/RHSA-2024:1868
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2023-6787
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2254375
Vendor Advisory
https://github.com/keycloak/keycloak/security/advisories/GHSA-c9h6-v78w-52wj
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