Server-Side Request Forgery Vulnerability in Kdcproxy by Red Hat
CVE-2025-59088

8.6HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat Enterprise Linux 7 Extended Lifecycle Support
Red Hat Enterprise Linux 8
Vendor
CVE Published:
12 November 2025

What is CVE-2025-59088?

This vulnerability arises when Kdcproxy processes a request for a realm without defined server addresses, leading it to query SRV records in the DNS zone of the realm. A malicious actor can exploit this behavior by crafting specific requests that target a DNS zone where they control SRV records. This could direct queries to arbitrary ports and hostnames, including those that resolve to internal or loopback IP addresses. As a result, attackers can probe the internal network's topology, scan ports, and potentially exfiltrate sensitive data. Deployments where the 'use_dns' setting is disabled are immune to this vulnerability.

Affected Version(s)

Red Hat Enterprise Linux 10 0:1.0.0-19.el10_1

Red Hat Enterprise Linux 10.0 Extended Update Support 0:1.0.0-19.el10_0

Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:0.3.2-3.el7_9.3

References

https://access.redhat.com/errata/RHSA-2025:21138
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21139
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21140
vendor-advisoryx_refsource_REDHAT

CVSS V3.1

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2025-59088 : Server-Side Request Forgery Vulnerability in Kdcproxy by Red Hat