CVE-2025-59088 Python-kdcproxy: unauthenticated ssrf via realm‑controlled dns srv
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.
Problem types: cwe_id: CWE-918
description: Server-Side Request Forgery (SSRF)
Affected products: vendor: latchset
product: kdcproxy
default_status: unaffected
vendor: Red Hat
product: Red Hat Enterprise Linux 10
cpes: cpe:/o:redhat:enterprise_linux:10.1
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 10.0 Extended Update Support
cpes: cpe:/o:redhat:enterprise_linux_eus:10.0
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 7 Extended Lifecycle Support
cpes: cpe:/o:redhat:rhel_els:7
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8
cpes: cpe:/a:redhat:enterprise_linux:8::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8
cpes: cpe:/a:redhat:enterprise_linux:8::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.2 Advanced Update Support
cpes: cpe:/a:redhat:rhel_aus:8.2::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
cpes: cpe:/a:redhat:rhel_aus:8.4::appstream
cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
cpes: cpe:/a:redhat:rhel_aus:8.4::appstream
cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
cpes: cpe:/a:redhat:rhel_e4s:8.6::appstream
cpe:/a:redhat:rhel_aus:8.6::appstream
cpe:/a:redhat:rhel_tus:8.6::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.6 Telecommunications Update Service
cpes: cpe:/a:redhat:rhel_e4s:8.6::appstream
cpe:/a:redhat:rhel_aus:8.6::appstream
cpe:/a:redhat:rhel_tus:8.6::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
cpes: cpe:/a:redhat:rhel_e4s:8.6::appstream
cpe:/a:redhat:rhel_aus:8.6::appstream
cpe:/a:redhat:rhel_tus:8.6::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.8 Telecommunications Update Service
cpes: cpe:/a:redhat:rhel_e4s:8.8::appstream
cpe:/a:redhat:rhel_tus:8.8::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
cpes: cpe:/a:redhat:rhel_e4s:8.8::appstream
cpe:/a:redhat:rhel_tus:8.8::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 9
cpes: cpe:/a:redhat:enterprise_linux:9::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
cpes: cpe:/a:redhat:rhel_e4s:9.0::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
cpes: cpe:/a:redhat:rhel_e4s:9.2::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 9.4 Extended Update Support
cpes: cpe:/a:redhat:rhel_eus:9.4::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 9.6 Extended Update Support
cpes: cpe:/a:redhat:rhel_eus:9.6::appstream
default_status: affected
CVSS v3.1: attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 8.6
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: NONE
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
version: 3.1
Credits: lang: en
value: Red Hat would like to thank Arad Inbar for reporting this issue.
Published: 2025-11-12T16:35:27.877Z