GHSA-jgwc-jh89-rpgq

Source

https://github.com/advisories/GHSA-jgwc-jh89-rpgq

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/11/GHSA-jgwc-jh89-rpgq/GHSA-jgwc-jh89-rpgq.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-jgwc-jh89-rpgq

Aliases

CVE-2024-9666

Downstream

CGA (2)

ECHO (1)

ECHO-7edb-23c5-02ec

Published

2024-11-25T19:39:12Z

Modified

2026-09-10T03:50:20Z

Severity

4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
5.7 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

Keycloak proxy header handling Denial-of-Service (DoS) vulnerability

Details

Keycloak versions 26 and earlier are vulnerable to a denial-of-service (DoS) attack through improper handling of proxy headers. When Keycloak is configured to accept incoming proxy headers, it may accept non-IP values, such as obfuscated identifiers, without proper validation. This can lead to costly DNS resolution operations, which an attacker could exploit to tie up IO threads and potentially cause a denial of service.

The attacker must have access to send requests to a Keycloak instance that is configured to accept proxy headers, specifically when reverse proxies do not overwrite incoming headers, and Keycloak is configured to trust these headers.

For Keycloak version 26, for successful exploitation includes: the realm must have SslRequired=EXTERNAL (the default), HTTP must be enabled, the instance must not be using a full hostname URL, access must come from behind a proxy (assuming the proxy overwrites the X-Forwarded-For header), and trusted proxies must not be set or must incorrectly trust the client from which the request is originating.

Database specific

{
    "cwe_ids":  [
        "CWE-444"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2024-11-25T19:39:12Z",
    "nvd_published_at":  null,
    "severity":  "MODERATE"
}

References

Affected packages

Maven / org.keycloak:keycloak-quarkus-server

Package

Name: org.keycloak:keycloak-quarkus-server; View open source insights on deps.dev
Purl: pkg:maven/org.keycloak/keycloak-quarkus-server

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

12.*

12.0.0

12.0.1

12.0.2

12.0.3

12.0.4

13.*

13.0.0

13.0.1

14.*

14.0.0

15.*

15.0.0

15.0.1

15.0.2

15.1.0

15.1.1

16.*

16.0.0

16.1.0

16.1.1

17.*

17.0.0

17.0.1

18.*

18.0.0

18.0.1

18.0.2

19.*

19.0.0

19.0.1

19.0.2

19.0.3

20.*

20.0.0

20.0.1

20.0.2

20.0.3

20.0.4

20.0.5

21.*

21.0.0

21.0.1

21.0.2

21.1.0

21.1.1

21.1.2

22.*

22.0.0

22.0.1

22.0.2

22.0.3

22.0.4

22.0.5

23.*

23.0.0

23.0.1

23.0.2

23.0.3

23.0.4

23.0.5

23.0.6

23.0.7

24.*

24.0.0

24.0.1

24.0.2

24.0.3

24.0.4

24.0.5

25.*

25.0.0

25.0.1

25.0.2

25.0.3

25.0.4

25.0.5

25.0.6

26.*

26.0.0

26.0.1

26.0.2

26.0.4

26.0.5

26.0.6

26.0.7

26.0.8

26.1.0

26.1.1

26.1.2

26.1.3

26.1.4

26.1.5

26.2.0

26.2.1

26.2.2

26.2.3

26.2.4

26.2.5

26.3.0

26.3.1

26.3.2

26.3.3

26.3.4

26.3.5

26.4.0

26.4.1

26.4.2

26.4.3

26.4.4

26.4.5

26.4.6

26.4.7

26.5.0

26.5.1

26.5.2

26.5.3

26.5.4

26.5.5

26.5.6

26.5.7

26.6.0

26.6.1

26.6.2

26.6.3

26.6.4

26.7.0

26.7.1

26.7.2

26.7.3

Database specific

last_known_affected_version_range

"< 24.0.9"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/11/GHSA-jgwc-jh89-rpgq/GHSA-jgwc-jh89-rpgq.json"