proftpd: CVE-2021-46854 memory disclosure to radius server

Upstream-Status: Backport from https://github.com/proftpd/proftpd/commit/10a227b4d50e0a2cd2faf87926f58d865da44e43

Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>

meta-networking/recipes-daemons/proftpd/files/CVE-2021-46854.patch

@@ -0,0 +1,51 @@
+From ed31fe2cbd5b8b1148b467f84f7acea66fa43bb8 Mon Sep 17 00:00:00 2001
+From: Chris Hofstaedtler <chris.hofstaedtler@deduktiva.com>
+Date: Tue, 3 Aug 2021 21:53:28 +0200
+Subject: [PATCH] CVE-2021-46854
+
+mod_radius: copy _only_ the password
+
+Upstream-Status: Backport [https://github.com/proftpd/proftpd/commit/10a227b4d50e0a2cd2faf87926f58d865da44e43]
+CVE: CVE-2021-46854
+Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
+---
+ contrib/mod_radius.c | 11 ++++++++---
+ 1 file changed, 8 insertions(+), 3 deletions(-)
+
+diff --git a/contrib/mod_radius.c b/contrib/mod_radius.c
+index b56cdfe..f234dd5 100644
+--- a/contrib/mod_radius.c
++++ b/contrib/mod_radius.c
+@@ -2319,21 +2319,26 @@ static void radius_add_passwd(radius_packet_t *packet, unsigned char type,
+ 
+   pwlen = strlen((const char *) passwd);
+ 
++  /* Clear the buffers. */
++  memset(pwhash, '\0', sizeof(pwhash));
++
+   if (pwlen == 0) {
+     pwlen = RADIUS_PASSWD_LEN;
+ 
+   } if ((pwlen & (RADIUS_PASSWD_LEN - 1)) != 0) {
++    /* pwlen is not a multiple of RADIUS_PASSWD_LEN, need to prepare a proper buffer */
++    memcpy(pwhash, passwd, pwlen);
+ 
+     /* Round up the length. */
+     pwlen += (RADIUS_PASSWD_LEN - 1);
+ 
+     /* Truncate the length, as necessary. */
+     pwlen &= ~(RADIUS_PASSWD_LEN - 1);
++  } else {
++    /* pwlen is a multiple of RADIUS_PASSWD_LEN, we can just use it. */
++    memcpy(pwhash, passwd, pwlen);
+   }
+ 
+-  /* Clear the buffers. */
+-  memset(pwhash, '\0', sizeof(pwhash));
+-  memcpy(pwhash, passwd, pwlen);
+ 
+   /* Find the password attribute. */
+   attrib = radius_get_attrib(packet, RADIUS_PASSWORD);
+-- 
+2.25.1
+

meta-networking/recipes-daemons/proftpd/proftpd_1.3.6.bb

@@ -12,6 +12,7 @@ SRC_URI = "ftp://ftp.proftpd.org/distrib/source/${BPN}-${PV}.tar.gz \
            file://contrib.patch  \
            file://build_fixup.patch \
            file://proftpd.service \
+           file://CVE-2021-46854.patch \
            "
 SRC_URI[md5sum] = "13270911c42aac842435f18205546a1b"
 SRC_URI[sha256sum] = "91ef74b143495d5ff97c4d4770c6804072a8c8eb1ad1ecc8cc541b40e152ecaf"