summaryrefslogtreecommitdiffstats
path: root/0010-libssh2-1.8.0-CVE-2019-17498.patch
diff options
context:
space:
mode:
Diffstat (limited to '0010-libssh2-1.8.0-CVE-2019-17498.patch')
-rw-r--r--0010-libssh2-1.8.0-CVE-2019-17498.patch232
1 files changed, 0 insertions, 232 deletions
diff --git a/0010-libssh2-1.8.0-CVE-2019-17498.patch b/0010-libssh2-1.8.0-CVE-2019-17498.patch
deleted file mode 100644
index 319e1fd..0000000
--- a/0010-libssh2-1.8.0-CVE-2019-17498.patch
+++ /dev/null
@@ -1,232 +0,0 @@
-From 1ea36437bb4b0f3ac42db5222cd7311363fa6ec9 Mon Sep 17 00:00:00 2001
-From: Will Cosgrove <will@panic.com>
-Date: Fri, 30 Aug 2019 09:57:38 -0700
-Subject: [PATCH] packet.c: improve message parsing (#402)
-
-* packet.c: improve parsing of packets
-
-file: packet.c
-
-notes:
-Use _libssh2_get_string API in SSH_MSG_DEBUG/SSH_MSG_DISCONNECT. Additional uint32 bounds check in SSH_MSG_GLOBAL_REQUEST.
-
-Upstream-commit: dedcbd106f8e52d5586b0205bc7677e4c9868f9c
-Signed-off-by: Kamil Dudka <kdudka@redhat.com>
----
- src/misc.c | 37 +++++++++++++++++++++++
- src/misc.h | 10 +++++++
- src/packet.c | 84 ++++++++++++++++++++++++----------------------------
- 3 files changed, 85 insertions(+), 46 deletions(-)
-
-diff --git a/src/misc.c b/src/misc.c
-index f7faae7..1b2682f 100644
---- a/src/misc.c
-+++ b/src/misc.c
-@@ -643,3 +643,40 @@ void *_libssh2_calloc(LIBSSH2_SESSION* session, size_t size)
- }
- return p;
- }
-+
-+int _libssh2_check_length(struct string_buf *buf, size_t len)
-+{
-+ unsigned char *endp = &buf->data[buf->len];
-+ size_t left = endp - buf->dataptr;
-+ return ((len <= left) && (left <= buf->len));
-+}
-+
-+int _libssh2_get_u32(struct string_buf *buf, uint32_t *out)
-+{
-+ if(!_libssh2_check_length(buf, 4)) {
-+ return -1;
-+ }
-+
-+ *out = _libssh2_ntohu32(buf->dataptr);
-+ buf->dataptr += 4;
-+ return 0;
-+}
-+
-+int _libssh2_get_string(struct string_buf *buf, unsigned char **outbuf,
-+ size_t *outlen)
-+{
-+ uint32_t data_len;
-+ if(_libssh2_get_u32(buf, &data_len) != 0) {
-+ return -1;
-+ }
-+ if(!_libssh2_check_length(buf, data_len)) {
-+ return -1;
-+ }
-+ *outbuf = buf->dataptr;
-+ buf->dataptr += data_len;
-+
-+ if(outlen)
-+ *outlen = (size_t)data_len;
-+
-+ return 0;
-+}
-diff --git a/src/misc.h b/src/misc.h
-index 54ae546..cf5abb5 100644
---- a/src/misc.h
-+++ b/src/misc.h
-@@ -49,6 +49,12 @@ struct list_node {
- struct list_head *head;
- };
-
-+struct string_buf {
-+ unsigned char *data;
-+ unsigned char *dataptr;
-+ size_t len;
-+};
-+
- int _libssh2_error_flags(LIBSSH2_SESSION* session, int errcode, const char* errmsg, int errflags);
- int _libssh2_error(LIBSSH2_SESSION* session, int errcode, const char* errmsg);
-
-@@ -80,6 +86,10 @@ void _libssh2_store_u32(unsigned char **buf, uint32_t value);
- void _libssh2_store_str(unsigned char **buf, const char *str, size_t len);
- void *_libssh2_calloc(LIBSSH2_SESSION* session, size_t size);
-
-+int _libssh2_get_u32(struct string_buf *buf, uint32_t *out);
-+int _libssh2_get_string(struct string_buf *buf, unsigned char **outbuf,
-+ size_t *outlen);
-+
- #if defined(LIBSSH2_WIN32) && !defined(__MINGW32__) && !defined(__CYGWIN__)
- /* provide a private one */
- #undef HAVE_GETTIMEOFDAY
-diff --git a/src/packet.c b/src/packet.c
-index c950b5d..f180b77 100644
---- a/src/packet.c
-+++ b/src/packet.c
-@@ -416,10 +416,10 @@ _libssh2_packet_add(LIBSSH2_SESSION * session, unsigned char *data,
- size_t datalen, int macstate)
- {
- int rc = 0;
-- char *message=NULL;
-- char *language=NULL;
-- size_t message_len=0;
-- size_t language_len=0;
-+ unsigned char *message = NULL;
-+ unsigned char *language = NULL;
-+ size_t message_len = 0;
-+ size_t language_len = 0;
- LIBSSH2_CHANNEL *channelp = NULL;
- size_t data_head = 0;
- unsigned char msg = data[0];
-@@ -430,7 +430,7 @@ _libssh2_packet_add(LIBSSH2_SESSION * session, unsigned char *data,
- "Packet type %d received, length=%d",
- (int) msg, (int) datalen);
-
-- if ((macstate == LIBSSH2_MAC_INVALID) &&
-+ if((macstate == LIBSSH2_MAC_INVALID) &&
- (!session->macerror ||
- LIBSSH2_MACERROR(session, (char *) data, datalen))) {
- /* Bad MAC input, but no callback set or non-zero return from the
-@@ -456,9 +456,9 @@ _libssh2_packet_add(LIBSSH2_SESSION * session, unsigned char *data,
- break;
- }
-
-- if (session->packAdd_state == libssh2_NB_state_allocated) {
-+ if(session->packAdd_state == libssh2_NB_state_allocated) {
- /* A couple exceptions to the packet adding rule: */
-- switch (msg) {
-+ switch(msg) {
-
- /*
- byte SSH_MSG_DISCONNECT
-@@ -469,32 +469,23 @@ _libssh2_packet_add(LIBSSH2_SESSION * session, unsigned char *data,
-
- case SSH_MSG_DISCONNECT:
- if(datalen >= 5) {
-- size_t reason = _libssh2_ntohu32(data + 1);
--
-- if(datalen >= 9) {
-- message_len = _libssh2_ntohu32(data + 5);
--
-- if(message_len < datalen-13) {
-- /* 9 = packet_type(1) + reason(4) + message_len(4) */
-- message = (char *) data + 9;
--
-- language_len = _libssh2_ntohu32(data + 9 + message_len);
-- language = (char *) data + 9 + message_len + 4;
--
-- if(language_len > (datalen-13-message_len)) {
-- /* bad input, clear info */
-- language = message = NULL;
-- language_len = message_len = 0;
-- }
-- }
-- else
-- /* bad size, clear it */
-- message_len=0;
-- }
-- if (session->ssh_msg_disconnect) {
-- LIBSSH2_DISCONNECT(session, reason, message,
-- message_len, language, language_len);
-+ uint32_t reason = 0;
-+ struct string_buf buf;
-+ buf.data = (unsigned char *)data;
-+ buf.dataptr = buf.data;
-+ buf.len = datalen;
-+ buf.dataptr++; /* advance past type */
-+
-+ _libssh2_get_u32(&buf, &reason);
-+ _libssh2_get_string(&buf, &message, &message_len);
-+ _libssh2_get_string(&buf, &language, &language_len);
-+
-+ if(session->ssh_msg_disconnect) {
-+ LIBSSH2_DISCONNECT(session, reason, (const char *)message,
-+ message_len, (const char *)language,
-+ language_len);
- }
-+
- _libssh2_debug(session, LIBSSH2_TRACE_TRANS,
- "Disconnect(%d): %s(%s)", reason,
- message, language);
-@@ -534,23 +525,24 @@ _libssh2_packet_add(LIBSSH2_SESSION * session, unsigned char *data,
- int always_display= data[1];
-
- if(datalen >= 6) {
-- message_len = _libssh2_ntohu32(data + 2);
--
-- if(message_len <= (datalen - 10)) {
-- /* 6 = packet_type(1) + display(1) + message_len(4) */
-- message = (char *) data + 6;
-- language_len = _libssh2_ntohu32(data + 6 + message_len);
--
-- if(language_len <= (datalen - 10 - message_len))
-- language = (char *) data + 10 + message_len;
-- }
-+ struct string_buf buf;
-+ buf.data = (unsigned char *)data;
-+ buf.dataptr = buf.data;
-+ buf.len = datalen;
-+ buf.dataptr += 2; /* advance past type & always display */
-+
-+ _libssh2_get_string(&buf, &message, &message_len);
-+ _libssh2_get_string(&buf, &language, &language_len);
- }
-
-- if (session->ssh_msg_debug) {
-- LIBSSH2_DEBUG(session, always_display, message,
-- message_len, language, language_len);
-+ if(session->ssh_msg_debug) {
-+ LIBSSH2_DEBUG(session, always_display,
-+ (const char *)message,
-+ message_len, (const char *)language,
-+ language_len);
- }
- }
-+
- /*
- * _libssh2_debug will actually truncate this for us so
- * that it's not an inordinate about of data
-@@ -573,7 +565,7 @@ _libssh2_packet_add(LIBSSH2_SESSION * session, unsigned char *data,
- uint32_t len =0;
- unsigned char want_reply=0;
- len = _libssh2_ntohu32(data + 1);
-- if(datalen >= (6 + len)) {
-+ if((len <= (UINT_MAX - 6)) && (datalen >= (6 + len))) {
- want_reply = data[5 + len];
- _libssh2_debug(session,
- LIBSSH2_TRACE_CONN,
---
-2.20.1
-
generated by cgit (git 2.34.1) at 2024-11-05 11:04:02 +0000