Revert "ppp: backport security fixes"

This reverts commit cc78f934a9466a0ef404bb169cc42680c7501d02 since it
didn't contain a reference to the CVE it addresses. The next commit
will re-add the commit including a CVE reference in its commit message.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

4 files changed, 1 insertions, 129 deletions

diff --git a/package/network/services/ppp/Makefile b/package/network/services/ppp/Makefile
index 64f60d00fa..beeaa53c22 100644
--- a/package/network/services/ppp/Makefile
+++ b/package/network/services/ppp/Makefile
@@ -10,7 +10,7 @@ include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=ppp
 PKG_VERSION:=2.4.7
-PKG_RELEASE:=13
+PKG_RELEASE:=12
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://download.samba.org/pub/ppp/
diff --git a/package/network/services/ppp/patches/700-radius-Prevent-buffer-overflow-in-rc_mksid.patch b/package/network/services/ppp/patches/700-radius-Prevent-buffer-overflow-in-rc_mksid.patch
deleted file mode 100644
index 1c5722e6dd..0000000000
--- a/package/network/services/ppp/patches/700-radius-Prevent-buffer-overflow-in-rc_mksid.patch
+++ /dev/null
@@ -1,30 +0,0 @@
-From 858976b1fc3107f1261aae337831959b511b83c2 Mon Sep 17 00:00:00 2001
-From: Paul Mackerras <paulus@ozlabs.org>
-Date: Sat, 4 Jan 2020 12:01:32 +1100
-Subject: [PATCH] radius: Prevent buffer overflow in rc_mksid()
-
-On some systems getpid() can return a value greater than 65535.
-Increase the size of buf[] to allow for this, and use slprintf()
-to make sure we never overflow it.
-
-Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
----
- pppd/plugins/radius/util.c | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/pppd/plugins/radius/util.c b/pppd/plugins/radius/util.c
-index 6f976a712951..740131e8377c 100644
---- a/pppd/plugins/radius/util.c
-+++ b/pppd/plugins/radius/util.c
-@@ -73,9 +73,9 @@ void rc_mdelay(int msecs)
- char *
- rc_mksid (void)
- {
--  static char buf[15];
-+  static char buf[32];
-   static unsigned short int cnt = 0;
--  sprintf (buf, "%08lX%04X%02hX",
-+  slprintf(buf, sizeof(buf), "%08lX%04X%02hX",
- 	   (unsigned long int) time (NULL),
- 	   (unsigned int) getpid (),
- 	   cnt & 0xFF);
diff --git a/package/network/services/ppp/patches/701-pppd-Fix-bounds-check-in-EAP-code.patch b/package/network/services/ppp/patches/701-pppd-Fix-bounds-check-in-EAP-code.patch
deleted file mode 100644
index c2ca9729ec..0000000000
--- a/package/network/services/ppp/patches/701-pppd-Fix-bounds-check-in-EAP-code.patch
+++ /dev/null
@@ -1,37 +0,0 @@
-From 8d7970b8f3db727fe798b65f3377fe6787575426 Mon Sep 17 00:00:00 2001
-From: Paul Mackerras <paulus@ozlabs.org>
-Date: Mon, 3 Feb 2020 15:53:28 +1100
-Subject: [PATCH] pppd: Fix bounds check in EAP code
-
-Given that we have just checked vallen < len, it can never be the case
-that vallen >= len + sizeof(rhostname).  This fixes the check so we
-actually avoid overflowing the rhostname array.
-
-Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
-Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
----
- pppd/eap.c | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/pppd/eap.c b/pppd/eap.c
-index 94407f56a336..1b93db01aebd 100644
---- a/pppd/eap.c
-+++ b/pppd/eap.c
-@@ -1420,7 +1420,7 @@ int len;
- 		}
- 
- 		/* Not so likely to happen. */
--		if (vallen >= len + sizeof (rhostname)) {
-+		if (len - vallen >= sizeof (rhostname)) {
- 			dbglog("EAP: trimming really long peer name down");
- 			BCOPY(inp + vallen, rhostname, sizeof (rhostname) - 1);
- 			rhostname[sizeof (rhostname) - 1] = '\0';
-@@ -1846,7 +1846,7 @@ int len;
- 		}
- 
- 		/* Not so likely to happen. */
--		if (vallen >= len + sizeof (rhostname)) {
-+		if (len - vallen >= sizeof (rhostname)) {
- 			dbglog("EAP: trimming really long peer name down");
- 			BCOPY(inp + vallen, rhostname, sizeof (rhostname) - 1);
- 			rhostname[sizeof (rhostname) - 1] = '\0';
diff --git a/package/network/services/ppp/patches/702-pppd-Ignore-received-EAP-messages-when-not-doing-EAP.patch b/package/network/services/ppp/patches/702-pppd-Ignore-received-EAP-messages-when-not-doing-EAP.patch
deleted file mode 100644
index 7286d81a56..0000000000
--- a/package/network/services/ppp/patches/702-pppd-Ignore-received-EAP-messages-when-not-doing-EAP.patch
+++ /dev/null
@@ -1,61 +0,0 @@
-From 8d45443bb5c9372b4c6a362ba2f443d41c5636af Mon Sep 17 00:00:00 2001
-From: Paul Mackerras <paulus@ozlabs.org>
-Date: Mon, 3 Feb 2020 16:31:42 +1100
-Subject: [PATCH] pppd: Ignore received EAP messages when not doing EAP
-
-This adds some basic checks to the subroutines of eap_input to check
-that we have requested or agreed to doing EAP authentication before
-doing any processing on the received packet.  The motivation is to
-make it harder for a malicious peer to disrupt the operation of pppd
-by sending unsolicited EAP packets.  Note that eap_success() already
-has a check that the EAP client state is reasonable, and does nothing
-(apart from possibly printing a debug message) if not.
-
-Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
----
- pppd/eap.c | 18 ++++++++++++++++++
- 1 file changed, 18 insertions(+)
-
-diff --git a/pppd/eap.c b/pppd/eap.c
-index 1b93db01aebd..082e95343120 100644
---- a/pppd/eap.c
-+++ b/pppd/eap.c
-@@ -1328,6 +1328,12 @@ int len;
- 	int fd;
- #endif /* USE_SRP */
- 
-+	/*
-+	 * Ignore requests if we're not open
-+	 */
-+	if (esp->es_client.ea_state <= eapClosed)
-+		return;
-+
- 	/*
- 	 * Note: we update es_client.ea_id *only if* a Response
- 	 * message is being generated.  Otherwise, we leave it the
-@@ -1736,6 +1742,12 @@ int len;
- 	u_char dig[SHA_DIGESTSIZE];
- #endif /* USE_SRP */
- 
-+	/*
-+	 * Ignore responses if we're not open
-+	 */
-+	if (esp->es_server.ea_state <= eapClosed)
-+		return;
-+
- 	if (esp->es_server.ea_id != id) {
- 		dbglog("EAP: discarding Response %d; expected ID %d", id,
- 		    esp->es_server.ea_id);
-@@ -2047,6 +2059,12 @@ u_char *inp;
- int id;
- int len;
- {
-+	/*
-+	 * Ignore failure messages if we're not open
-+	 */
-+	if (esp->es_client.ea_state <= eapClosed)
-+		return;
-+
- 	if (!eap_client_active(esp)) {
- 		dbglog("EAP unexpected failure message in state %s (%d)",
- 		    eap_state_name(esp->es_client.ea_state),