94 lines
4.6 KiB
Diff
94 lines
4.6 KiB
Diff
From 74017383c8c73f25d12ef847c96854641f88fae4 Mon Sep 17 00:00:00 2001
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From: Guy Harris <gharris@sonic.net>
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Date: Fri, 19 May 2023 16:29:45 -0700
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Subject: [PATCH] netscaler: add more checks to make sure the record is within
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the page.
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Whie we're at it, restructure some other checks to test-before-casting -
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it's OK to test afterwards, but testing before makes it follow the
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pattern used elsewhere.
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Fixes #19081.
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(cherry picked from commit cb190d6839ddcd4596b0205844f45553f1e77105)
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---
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wiretap/netscaler.c | 15 ++++++++++-----
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1 file changed, 10 insertions(+), 5 deletions(-)
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diff --git a/wiretap/netscaler.c b/wiretap/netscaler.c
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index 8dcbd42a089..b94caca0869 100644
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--- a/wiretap/netscaler.c
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+++ b/wiretap/netscaler.c
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@@ -1114,13 +1114,13 @@ static gboolean nstrace_set_start_time(wtap *wth, int file_version, int *err,
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#define PACKET_DESCRIBE(rec,buf,FULLPART,fullpart,ver,type,HEADERVER) \
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do {\
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- nspr_pktrace##fullpart##_v##ver##_t *type = (nspr_pktrace##fullpart##_v##ver##_t *) &nstrace_buf[nstrace_buf_offset];\
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/* Make sure the record header is entirely contained in the page */\
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- if ((nstrace_buflen - nstrace_buf_offset) < sizeof *type) {\
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+ if ((nstrace_buflen - nstrace_buf_offset) < sizeof(nspr_pktrace##fullpart##_v##ver##_t)) {\
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*err = WTAP_ERR_BAD_FILE;\
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*err_info = g_strdup("nstrace: record header crosses page boundary");\
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return FALSE;\
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}\
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+ nspr_pktrace##fullpart##_v##ver##_t *type = (nspr_pktrace##fullpart##_v##ver##_t *) &nstrace_buf[nstrace_buf_offset];\
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/* Check sanity of record size */\
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if (pletoh16(&type->nsprRecordSize) < sizeof *type) {\
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*err = WTAP_ERR_BAD_FILE;\
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@@ -1186,6 +1186,8 @@ static gboolean nstrace_read_v10(wtap *wth, wtap_rec *rec, Buffer *buf,
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case NSPR_ABSTIME_V10:
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{
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+ if (!nstrace_ensure_buflen(nstrace, nstrace_buf_offset, sizeof(nspr_pktracefull_v10_t), err, err_info))
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+ return FALSE;
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nspr_pktracefull_v10_t *fp = (nspr_pktracefull_v10_t *) &nstrace_buf[nstrace_buf_offset];
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if (pletoh16(&fp->nsprRecordSize) == 0) {
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*err = WTAP_ERR_BAD_FILE;
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@@ -1199,6 +1201,8 @@ static gboolean nstrace_read_v10(wtap *wth, wtap_rec *rec, Buffer *buf,
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case NSPR_RELTIME_V10:
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{
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+ if (!nstrace_ensure_buflen(nstrace, nstrace_buf_offset, sizeof(nspr_pktracefull_v10_t), err, err_info))
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+ return FALSE;
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nspr_pktracefull_v10_t *fp = (nspr_pktracefull_v10_t *) &nstrace_buf[nstrace_buf_offset];
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if (pletoh16(&fp->nsprRecordSize) == 0) {
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*err = WTAP_ERR_BAD_FILE;
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@@ -1216,6 +1220,8 @@ static gboolean nstrace_read_v10(wtap *wth, wtap_rec *rec, Buffer *buf,
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default:
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{
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+ if (!nstrace_ensure_buflen(nstrace, nstrace_buf_offset, sizeof(nspr_pktracefull_v10_t), err, err_info))
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+ return FALSE;
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nspr_pktracefull_v10_t *fp = (nspr_pktracefull_v10_t *) &nstrace_buf[nstrace_buf_offset];
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if (pletoh16(&fp->nsprRecordSize) == 0) {
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*err = WTAP_ERR_BAD_FILE;
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@@ -1500,14 +1506,14 @@ static gboolean nstrace_read_v20(wtap *wth, wtap_rec *rec, Buffer *buf,
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#define PACKET_DESCRIBE(rec,buf,FULLPART,ver,enumprefix,type,structname,HEADERVER)\
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do {\
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- nspr_##structname##_t *fp = (nspr_##structname##_t *) &nstrace_buf[nstrace_buf_offset];\
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/* Make sure the record header is entirely contained in the page */\
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- if ((nstrace->nstrace_buflen - nstrace_buf_offset) < sizeof *fp) {\
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+ if ((nstrace->nstrace_buflen - nstrace_buf_offset) < sizeof(nspr_##structname##_t)) {\
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*err = WTAP_ERR_BAD_FILE;\
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*err_info = g_strdup("nstrace: record header crosses page boundary");\
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g_free(nstrace_tmpbuff);\
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return FALSE;\
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}\
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+ nspr_##structname##_t *fp = (nspr_##structname##_t *) &nstrace_buf[nstrace_buf_offset];\
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(rec)->rec_type = REC_TYPE_PACKET;\
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TIMEDEFV##ver((rec),fp,type);\
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FULLPART##SIZEDEFV##ver((rec),fp,ver);\
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@@ -1615,7 +1621,6 @@ static gboolean nstrace_read_v30(wtap *wth, wtap_rec *rec, Buffer *buf,
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g_free(nstrace_tmpbuff);
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return FALSE;
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}
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-
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hdp = (nspr_hd_v20_t *) &nstrace_buf[nstrace_buf_offset];
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if (nspr_getv20recordsize(hdp) == 0) {
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*err = WTAP_ERR_BAD_FILE;
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--
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GitLab
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