CVE-2025-59088
Python-kdcproxy: unauthenticated ssrf via realm‑controlled dns srv
HIGH 8.6
At a glance
- Source
- NVD
- EPSS
- EPSS 0.49 % · percentile 42 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Deferred
Description
If kdcproxy receives a request for a realm which does not have server addresses defined in its configuration, by default, it will query SRV records in the DNS zone matching the requested realm name. This creates a server-side request forgery vulnerability, since an attacker could send a request for a realm matching a DNS zone where they created SRV records pointing to arbitrary ports and hostnames (which may resolve to loopback or internal IP addresses). This vulnerability can be exploited to probe internal network topology and firewall rules, perform port scanning, and exfiltrate data. Deployments where the "use_dns" setting is explicitly set to false are not affected.
Weaknesses (CWE)
- CWE-918 — Server-Side Request Forgery
References
- https://access.redhat.com/errata/RHSA-2025:21138
- https://access.redhat.com/errata/RHSA-2025:21139
- https://access.redhat.com/errata/RHSA-2025:21140
- https://access.redhat.com/errata/RHSA-2025:21141
- https://access.redhat.com/errata/RHSA-2025:21142
- https://access.redhat.com/errata/RHSA-2025:21448
- https://access.redhat.com/errata/RHSA-2025:21748
- https://access.redhat.com/errata/RHSA-2025:21806
- https://access.redhat.com/errata/RHSA-2025:21818
- https://access.redhat.com/errata/RHSA-2025:21819
- https://access.redhat.com/errata/RHSA-2025:21820
- https://access.redhat.com/errata/RHSA-2025:21821
- https://access.redhat.com/errata/RHSA-2025:22982
- https://access.redhat.com/security/cve/CVE-2025-59088
- https://bugzilla.redhat.com/show_bug.cgi?id=2393955
- https://github.com/latchset/kdcproxy/pull/68
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N | redhat |
| CVSS 3.1 | HIGH 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N | NVD · secalert@redhat.com (Secondary) |
European references
- ENISA EUVD · EUVD-2025-131921
- GCVE · GCVE-0-2025-59088
Affected products
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |