cups: fix CVE-2023-34241 use-after-free in cupsdAcceptClient() in scheduler/client.c

(From OE-Core rev: 9a6c7442ac2fc2ce668d0c931696d39288ee3d4a)

Signed-off-by: Vivek Kumbhar <vkumbhar@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 69 insertions, 0 deletions

diff --git a/meta/recipes-extended/cups/cups.inc b/meta/recipes-extended/cups/cups.inc
index 1b87d47a49..87f220590f 100644
--- a/meta/recipes-extended/cups/cups.inc
+++ b/meta/recipes-extended/cups/cups.inc
@@ -16,6 +16,7 @@ SRC_URI = "https://github.com/OpenPrinting/cups/releases/download/v${PV}/cups-${
            file://volatiles.99_cups \
            file://cups-volatiles.conf \
            file://CVE-2023-32324.patch \
+           file://CVE-2023-34241.patch \
            "
 
 UPSTREAM_CHECK_URI = "https://github.com/OpenPrinting/cups/releases"
diff --git a/meta/recipes-extended/cups/cups/CVE-2023-34241.patch b/meta/recipes-extended/cups/cups/CVE-2023-34241.patch
new file mode 100644
index 0000000000..95b3925b36
--- /dev/null
+++ b/meta/recipes-extended/cups/cups/CVE-2023-34241.patch
@@ -0,0 +1,68 @@
+From ffd290b4ab247f82722927ba9b21358daa16dbf1 Mon Sep 17 00:00:00 2001
+From: Rose <83477269+AtariDreams@users.noreply.github.com>
+Date: Thu, 1 Jun 2023 11:33:39 -0400
+Subject: [PATCH] Log result of httpGetHostname BEFORE closing the connection
+
+httpClose frees the memory of con->http. This is problematic because httpGetHostname then tries to access the memory it points to.
+
+We have to log the hostname first.
+
+Upstream-Status: Backport [https://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2]
+CVE: CVE-2023-34241
+Signed-off-by: Vivek Kumbhar <vkumbhar@mvista.com>
+---
+ scheduler/client.c | 16 +++++++---------
+ 1 file changed, 7 insertions(+), 9 deletions(-)
+
+diff --git a/scheduler/client.c b/scheduler/client.c
+index e7e419f..441c1d7 100644
+--- a/scheduler/client.c
++++ b/scheduler/client.c
+@@ -193,13 +193,11 @@ cupsdAcceptClient(cupsd_listener_t *lis)/* I - Listener socket */
+    /*
+     * Can't have an unresolved IP address with double-lookups enabled...
+     */
+-
+-    httpClose(con->http);
+-
+     cupsdLogClient(con, CUPSD_LOG_WARN,
+-                    "Name lookup failed - connection from %s closed!",
++                    "Name lookup failed - closing connection from %s!",
+                     httpGetHostname(con->http, NULL, 0));
+ 
++    httpClose(con->http);
+     free(con);
+     return;
+   }
+@@ -235,11 +233,11 @@ cupsdAcceptClient(cupsd_listener_t *lis)/* I - Listener socket */
+       * with double-lookups enabled...
+       */
+ 
+-      httpClose(con->http);
+-
+       cupsdLogClient(con, CUPSD_LOG_WARN,
+-                      "IP lookup failed - connection from %s closed!",
++                      "IP lookup failed - closing connection from %s!",
+                       httpGetHostname(con->http, NULL, 0));
++
++      httpClose(con->http);
+       free(con);
+       return;
+     }
+@@ -256,11 +254,11 @@ cupsdAcceptClient(cupsd_listener_t *lis)/* I - Listener socket */
+ 
+   if (!hosts_access(&wrap_req))
+   {
+-    httpClose(con->http);
+-
+     cupsdLogClient(con, CUPSD_LOG_WARN,
+                     "Connection from %s refused by /etc/hosts.allow and "
+                    "/etc/hosts.deny rules.", httpGetHostname(con->http, NULL, 0));
++
++    httpClose(con->http);
+     free(con);
+     return;
+   }
+-- 
+2.25.1
+