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From 595d691075b1d396d2edfaa0a8fd0873a0a1f221 Mon Sep 17 00:00:00 2001
From: Zdenek Dohnal <zdohnal@redhat.com>
Date: Thu, 11 Sep 2025 14:44:59 +0200
Subject: [PATCH] cupsd: Block authentication using alternate method
Fixes: CVE-2025-58060
Upstream-Status: Backport [https://github.com/OpenPrinting/cups/commit/595d691075b1d396d2edfaa0a8fd0873a0a1f221]
CVE: CVE-2025-58060
Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
---
scheduler/auth.c | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/scheduler/auth.c b/scheduler/auth.c
index 5fa53644d..3c9aa72aa 100644
--- a/scheduler/auth.c
+++ b/scheduler/auth.c
@@ -513,6 +513,16 @@ cupsdAuthorize(cupsd_client_t *con) /* I - Client connection */
int userlen; /* Username:password length */
+ /*
+ * Only allow Basic if enabled...
+ */
+
+ if (type != CUPSD_AUTH_BASIC)
+ {
+ cupsdLogClient(con, CUPSD_LOG_ERROR, "Basic authentication is not enabled.");
+ return;
+ }
+
authorization += 5;
while (isspace(*authorization & 255))
authorization ++;
@@ -558,7 +568,6 @@ cupsdAuthorize(cupsd_client_t *con) /* I - Client connection */
* Validate the username and password...
*/
- if (type == CUPSD_AUTH_BASIC)
{
#if HAVE_LIBPAM
/*
@@ -727,6 +736,16 @@ cupsdAuthorize(cupsd_client_t *con) /* I - Client connection */
/* Output token for username */
gss_name_t client_name; /* Client name */
+ /*
+ * Only allow Kerberos if enabled...
+ */
+
+ if (type != CUPSD_AUTH_NEGOTIATE)
+ {
+ cupsdLogClient(con, CUPSD_LOG_ERROR, "Kerberos authentication is not enabled.");
+ return;
+ }
+
# ifdef __APPLE__
/*
* If the weak-linked GSSAPI/Kerberos library is not present, don't try
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