CVE-2025-59088
highpriority · track · 0EPSS 0.005 · 42 %ileDEEURUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (36)
Products and version ranges known to be affected.
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support< 8040020251103205102.5b01ab7eenisa_euvdEU
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On< 8040020251103205102.5b01ab7eenisa_euvdEU
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support< 8060020251030180424.ada582f1enisa_euvdEU
- Red Hat Enterprise Linux 8.6 Telecommunications Update Service< 8060020251030180424.ada582f1enisa_euvdEU
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2025-2586Red Hat Enterprise Linux (python-kdcproxy): Mehrere SchwachstellenDeutsch2025-11-12csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um Informationen offenzulegen und um einen Denial-of-Service-Zustand zu verursachen.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (42)
External citations — patches, advisories, analysis.
- https://access.redhat.com/errata/RHSA-2025:21138cnnvd
- https://access.redhat.com/errata/RHSA-2025:21139cnnvd
- https://access.redhat.com/errata/RHSA-2025:21140cnnvd
- https://access.redhat.com/errata/RHSA-2025:21141cnnvd
- https://access.redhat.com/errata/RHSA-2025:21142cnnvd
- https://access.redhat.com/security/cve/CVE-2025-59088cnnvd
- https://bugzilla.redhat.com/show_bug.cgi?id=2393955cnnvd
- https://github.com/latchset/kdcproxy/pull/68cnnvd
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