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From cb190d6839ddcd4596b0205844f45553f1e77105 Mon Sep 17 00:00:00 2001
From: Guy Harris <gharris@sonic.net>
Date: Fri, 19 May 2023 16:29:45 -0700
Subject: [PATCH] netscaler: add more checks to make sure the record is within
the page.
Whie we're at it, restructure some other checks to test-before-casting -
it's OK to test afterwards, but testing before makes it follow the
pattern used elsewhere.
Fixes #19081.
Upstream-Status: Backport [https://gitlab.com/wireshark/wireshark/-/commit/cb190d6839ddcd4596b0205844f45553f1e77105]
CVE: CVE-2023-2858
Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
---
wiretap/netscaler.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/wiretap/netscaler.c b/wiretap/netscaler.c
index 01a7f6d..4fa020b 100644
--- a/wiretap/netscaler.c
+++ b/wiretap/netscaler.c
@@ -1091,13 +1091,13 @@ static gboolean nstrace_set_start_time(wtap *wth, int *err, gchar **err_info)
#define PACKET_DESCRIBE(rec,buf,FULLPART,fullpart,ver,type,HEADERVER) \
do {\
- nspr_pktrace##fullpart##_v##ver##_t *type = (nspr_pktrace##fullpart##_v##ver##_t *) &nstrace_buf[nstrace_buf_offset];\
/* Make sure the record header is entirely contained in the page */\
- if ((nstrace_buflen - nstrace_buf_offset) < sizeof *type) {\
+ if ((nstrace_buflen - nstrace_buf_offset) < sizeof(nspr_pktrace##fullpart##_v##ver##_t)) {\
*err = WTAP_ERR_BAD_FILE;\
*err_info = g_strdup("nstrace: record header crosses page boundary");\
return FALSE;\
}\
+ nspr_pktrace##fullpart##_v##ver##_t *type = (nspr_pktrace##fullpart##_v##ver##_t *) &nstrace_buf[nstrace_buf_offset];\
/* Check sanity of record size */\
if (pletoh16(&type->nsprRecordSize) < sizeof *type) {\
*err = WTAP_ERR_BAD_FILE;\
@@ -1162,6 +1162,8 @@ static gboolean nstrace_read_v10(wtap *wth, wtap_rec *rec, Buffer *buf,
case NSPR_ABSTIME_V10:
{
+ if (!nstrace_ensure_buflen(nstrace, nstrace_buf_offset, sizeof(nspr_pktracefull_v10_t), err, err_info))
+ return FALSE;
nspr_pktracefull_v10_t *fp = (nspr_pktracefull_v10_t *) &nstrace_buf[nstrace_buf_offset];
if (pletoh16(&fp->nsprRecordSize) == 0) {
*err = WTAP_ERR_BAD_FILE;
@@ -1175,6 +1177,8 @@ static gboolean nstrace_read_v10(wtap *wth, wtap_rec *rec, Buffer *buf,
case NSPR_RELTIME_V10:
{
+ if (!nstrace_ensure_buflen(nstrace, nstrace_buf_offset, sizeof(nspr_pktracefull_v10_t), err, err_info))
+ return FALSE;
nspr_pktracefull_v10_t *fp = (nspr_pktracefull_v10_t *) &nstrace_buf[nstrace_buf_offset];
if (pletoh16(&fp->nsprRecordSize) == 0) {
*err = WTAP_ERR_BAD_FILE;
@@ -1192,6 +1196,8 @@ static gboolean nstrace_read_v10(wtap *wth, wtap_rec *rec, Buffer *buf,
default:
{
+ if (!nstrace_ensure_buflen(nstrace, nstrace_buf_offset, sizeof(nspr_pktracefull_v10_t), err, err_info))
+ return FALSE;
nspr_pktracefull_v10_t *fp = (nspr_pktracefull_v10_t *) &nstrace_buf[nstrace_buf_offset];
if (pletoh16(&fp->nsprRecordSize) == 0) {
*err = WTAP_ERR_BAD_FILE;
@@ -1475,14 +1481,14 @@ static gboolean nstrace_read_v20(wtap *wth, wtap_rec *rec, Buffer *buf,
#define PACKET_DESCRIBE(rec,buf,FULLPART,ver,enumprefix,type,structname,HEADERVER)\
do {\
- nspr_##structname##_t *fp = (nspr_##structname##_t *) &nstrace_buf[nstrace_buf_offset];\
/* Make sure the record header is entirely contained in the page */\
- if ((nstrace->nstrace_buflen - nstrace_buf_offset) < sizeof *fp) {\
+ if ((nstrace->nstrace_buflen - nstrace_buf_offset) < sizeof(nspr_##structname##_t)) {\
*err = WTAP_ERR_BAD_FILE;\
*err_info = g_strdup("nstrace: record header crosses page boundary");\
g_free(nstrace_tmpbuff);\
return FALSE;\
}\
+ nspr_##structname##_t *fp = (nspr_##structname##_t *) &nstrace_buf[nstrace_buf_offset];\
(rec)->rec_type = REC_TYPE_PACKET;\
TIMEDEFV##ver((rec),fp,type);\
FULLPART##SIZEDEFV##ver((rec),fp,ver);\
@@ -1589,7 +1595,6 @@ static gboolean nstrace_read_v30(wtap *wth, wtap_rec *rec, Buffer *buf,
g_free(nstrace_tmpbuff);
return FALSE;
}
-
hdp = (nspr_hd_v20_t *) &nstrace_buf[nstrace_buf_offset];
if (nspr_getv20recordsize(hdp) == 0) {
*err = WTAP_ERR_BAD_FILE;
--
2.25.1
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