CVE-2025-59088

Name	CVE-2025-59088
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1120702

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
python-kdcproxy (PTS)	bookworm, bullseye	1.0.0-1	vulnerable
	forky, sid, trixie	1.0.0-2	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
python-kdcproxy	source	(unstable)	(unfixed)			1120702

Notes

[trixie] - python-kdcproxy <no-dsa> (Minor issue)
[bookworm] - python-kdcproxy <no-dsa> (Minor issue)
[bullseye] - python-kdcproxy <postponed> (Minor issue)
https://github.com/latchset/kdcproxy/pull/68
Fixed by: https://github.com/latchset/kdcproxy/commit/1773f28eeea72ec6efcd433d3b66595c44d1253f