[Asterisk-code-review] pjproject: 2.13 security fixes (asterisk[16])
Friendly Automation
asteriskteam at digium.com
Thu Dec 1 11:11:14 CST 2022
Friendly Automation has uploaded this change for review. ( https://gerrit.asterisk.org/c/asterisk/+/19652 )
Change subject: pjproject: 2.13 security fixes
......................................................................
pjproject: 2.13 security fixes
Backports two security fixes (c4d3498 and 450baca) from pjproject 2.13.
ASTERISK-30338
Change-Id: I86fdc003d5d22cb66e7cc6dc3313a8194f27eb69
---
A third-party/pjproject/patches/0200-potential-buffer-overflow-in-pjlib-scanner-and-pjmedia.patch
A third-party/pjproject/patches/0201-potential-stack-buffer-overflow-when-parsing-message-as-a-STUN-client.patch
2 files changed, 363 insertions(+), 0 deletions(-)
git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/52/19652/1
diff --git a/third-party/pjproject/patches/0200-potential-buffer-overflow-in-pjlib-scanner-and-pjmedia.patch b/third-party/pjproject/patches/0200-potential-buffer-overflow-in-pjlib-scanner-and-pjmedia.patch
new file mode 100644
index 0000000..cf4359a
--- /dev/null
+++ b/third-party/pjproject/patches/0200-potential-buffer-overflow-in-pjlib-scanner-and-pjmedia.patch
@@ -0,0 +1,306 @@
+From c4d34984ec92b3d5252a7d5cddd85a1d3a8001ae Mon Sep 17 00:00:00 2001
+From: sauwming <ming at teluu.com>
+Date: Mon, 3 Oct 2022 08:07:22 +0800
+Subject: [PATCH] Merge pull request from GHSA-fq45-m3f7-3mhj
+
+* Initial patch
+
+* Use 'pj_scan_is_eof(scanner)'
+
+Co-authored-by: Aaron Lichtman <aaronlichtman at gmail.com>
+
+* Use 'pj_scan_is_eof(scanner)'
+
+Co-authored-by: Aaron Lichtman <aaronlichtman at gmail.com>
+
+* Use 'pj_scan_is_eof(scanner)'
+
+Co-authored-by: Aaron Lichtman <aaronlichtman at gmail.com>
+
+* Use `!pj_scan_is_eof` instead of manually checking `scanner->curptr < scanner->end`
+
+Co-authored-by: Maksim Mukosey <mmukosey at gmail.com>
+
+* Update pjlib-util/src/pjlib-util/scanner.c
+
+Co-authored-by: Aaron Lichtman <aaronlichtman at gmail.com>
+
+* Update pjlib-util/src/pjlib-util/scanner.c
+
+Co-authored-by: Aaron Lichtman <aaronlichtman at gmail.com>
+
+* Update pjlib-util/src/pjlib-util/scanner.c
+
+Co-authored-by: Aaron Lichtman <aaronlichtman at gmail.com>
+
+* Revert '>=' back to '>' in pj_scan_stricmp_alnum()
+
+* Fix error compiles.
+
+Co-authored-by: Nanang Izzuddin <nanang at teluu.com>
+Co-authored-by: Aaron Lichtman <aaronlichtman at gmail.com>
+Co-authored-by: Maksim Mukosey <mmukosey at gmail.com>
+---
+ pjlib-util/src/pjlib-util/scanner.c | 41 +++++++++++++++++++----------
+ pjmedia/src/pjmedia/rtp.c | 11 +++++---
+ pjmedia/src/pjmedia/sdp.c | 24 ++++++++++-------
+ 3 files changed, 48 insertions(+), 28 deletions(-)
+
+diff --git a/pjlib-util/src/pjlib-util/scanner.c b/pjlib-util/src/pjlib-util/scanner.c
+index a54edf2d8..6541bbae3 100644
+--- a/pjlib-util/src/pjlib-util/scanner.c
++++ b/pjlib-util/src/pjlib-util/scanner.c
+@@ -195,7 +195,13 @@ PJ_DEF(void) pj_scan_skip_whitespace( pj_scanner *scanner )
+
+ PJ_DEF(void) pj_scan_skip_line( pj_scanner *scanner )
+ {
+- char *s = pj_memchr(scanner->curptr, '\n', scanner->end - scanner->curptr);
++ char *s;
++
++ if (pj_scan_is_eof(scanner)) {
++ return;
++ }
++
++ s = pj_memchr(scanner->curptr, '\n', scanner->end - scanner->curptr);
+ if (!s) {
+ scanner->curptr = scanner->end;
+ } else {
+@@ -264,8 +270,7 @@ PJ_DEF(void) pj_scan_get( pj_scanner *scanner,
+
+ pj_assert(pj_cis_match(spec,0)==0);
+
+- /* EOF is detected implicitly */
+- if (!pj_cis_match(spec, *s)) {
++ if (pj_scan_is_eof(scanner) || !pj_cis_match(spec, *s)) {
+ pj_scan_syntax_err(scanner);
+ return;
+ }
+@@ -299,8 +304,7 @@ PJ_DEF(void) pj_scan_get_unescape( pj_scanner *scanner,
+ /* Must not match character '%' */
+ pj_assert(pj_cis_match(spec,'%')==0);
+
+- /* EOF is detected implicitly */
+- if (!pj_cis_match(spec, *s) && *s != '%') {
++ if (pj_scan_is_eof(scanner) || !pj_cis_match(spec, *s) && *s != '%') {
+ pj_scan_syntax_err(scanner);
+ return;
+ }
+@@ -436,7 +440,9 @@ PJ_DEF(void) pj_scan_get_n( pj_scanner *scanner,
+
+ scanner->curptr += N;
+
+- if (PJ_SCAN_IS_PROBABLY_SPACE(*scanner->curptr) && scanner->skip_ws) {
++ if (!pj_scan_is_eof(scanner) &&
++ PJ_SCAN_IS_PROBABLY_SPACE(*scanner->curptr) && scanner->skip_ws)
++ {
+ pj_scan_skip_whitespace(scanner);
+ }
+ }
+@@ -467,15 +473,16 @@ PJ_DEF(int) pj_scan_get_char( pj_scanner *scanner )
+
+ PJ_DEF(void) pj_scan_get_newline( pj_scanner *scanner )
+ {
+- if (!PJ_SCAN_IS_NEWLINE(*scanner->curptr)) {
++ if (pj_scan_is_eof(scanner) || !PJ_SCAN_IS_NEWLINE(*scanner->curptr)) {
+ pj_scan_syntax_err(scanner);
+ return;
+ }
+
++ /* We have checked scanner->curptr validity above */
+ if (*scanner->curptr == '\r') {
+ ++scanner->curptr;
+ }
+- if (*scanner->curptr == '\n') {
++ if (!pj_scan_is_eof(scanner) && *scanner->curptr == '\n') {
+ ++scanner->curptr;
+ }
+
+@@ -520,7 +527,9 @@ PJ_DEF(void) pj_scan_get_until( pj_scanner *scanner,
+
+ scanner->curptr = s;
+
+- if (PJ_SCAN_IS_PROBABLY_SPACE(*s) && scanner->skip_ws) {
++ if (!pj_scan_is_eof(scanner) && PJ_SCAN_IS_PROBABLY_SPACE(*s) &&
++ scanner->skip_ws)
++ {
+ pj_scan_skip_whitespace(scanner);
+ }
+ }
+@@ -544,7 +553,9 @@ PJ_DEF(void) pj_scan_get_until_ch( pj_scanner *scanner,
+
+ scanner->curptr = s;
+
+- if (PJ_SCAN_IS_PROBABLY_SPACE(*s) && scanner->skip_ws) {
++ if (!pj_scan_is_eof(scanner) && PJ_SCAN_IS_PROBABLY_SPACE(*s) &&
++ scanner->skip_ws)
++ {
+ pj_scan_skip_whitespace(scanner);
+ }
+ }
+@@ -570,7 +581,9 @@ PJ_DEF(void) pj_scan_get_until_chr( pj_scanner *scanner,
+
+ scanner->curptr = s;
+
+- if (PJ_SCAN_IS_PROBABLY_SPACE(*s) && scanner->skip_ws) {
++ if (!pj_scan_is_eof(scanner) && PJ_SCAN_IS_PROBABLY_SPACE(*s) &&
++ scanner->skip_ws)
++ {
+ pj_scan_skip_whitespace(scanner);
+ }
+ }
+@@ -585,7 +598,9 @@ PJ_DEF(void) pj_scan_advance_n( pj_scanner *scanner,
+
+ scanner->curptr += N;
+
+- if (PJ_SCAN_IS_PROBABLY_SPACE(*scanner->curptr) && skip_ws) {
++ if (!pj_scan_is_eof(scanner) &&
++ PJ_SCAN_IS_PROBABLY_SPACE(*scanner->curptr) && skip_ws)
++ {
+ pj_scan_skip_whitespace(scanner);
+ }
+ }
+@@ -636,5 +651,3 @@ PJ_DEF(void) pj_scan_restore_state( pj_scanner *scanner,
+ scanner->line = state->line;
+ scanner->start_line = state->start_line;
+ }
+-
+-
+diff --git a/pjmedia/src/pjmedia/rtp.c b/pjmedia/src/pjmedia/rtp.c
+index 18917f18b..d29348cc5 100644
+--- a/pjmedia/src/pjmedia/rtp.c
++++ b/pjmedia/src/pjmedia/rtp.c
+@@ -188,6 +188,11 @@ PJ_DEF(pj_status_t) pjmedia_rtp_decode_rtp2(
+ /* Payload is located right after header plus CSRC */
+ offset = sizeof(pjmedia_rtp_hdr) + ((*hdr)->cc * sizeof(pj_uint32_t));
+
++ /* Check that offset is less than packet size */
++ if (offset >= pkt_len) {
++ return PJMEDIA_RTP_EINLEN;
++ }
++
+ /* Decode RTP extension. */
+ if ((*hdr)->x) {
+ if (offset + sizeof (pjmedia_rtp_ext_hdr) > (unsigned)pkt_len)
+@@ -202,8 +207,8 @@ PJ_DEF(pj_status_t) pjmedia_rtp_decode_rtp2(
+ dec_hdr->ext_len = 0;
+ }
+
+- /* Check that offset is less than packet size */
+- if (offset > pkt_len)
++ /* Check again that offset is still less than packet size */
++ if (offset >= pkt_len)
+ return PJMEDIA_RTP_EINLEN;
+
+ /* Find and set payload. */
+@@ -393,5 +398,3 @@ void pjmedia_rtp_seq_update( pjmedia_rtp_seq_session *sess,
+ seq_status->status.value = st.status.value;
+ }
+ }
+-
+-
+diff --git a/pjmedia/src/pjmedia/sdp.c b/pjmedia/src/pjmedia/sdp.c
+index 3905c2f52..647f49e13 100644
+--- a/pjmedia/src/pjmedia/sdp.c
++++ b/pjmedia/src/pjmedia/sdp.c
+@@ -983,13 +983,13 @@ static void parse_version(pj_scanner *scanner,
+ ctx->last_error = PJMEDIA_SDP_EINVER;
+
+ /* check equal sign */
+- if (*(scanner->curptr+1) != '=') {
++ if (scanner->curptr+1 >= scanner->end || *(scanner->curptr+1) != '=') {
+ on_scanner_error(scanner);
+ return;
+ }
+
+ /* check version is 0 */
+- if (*(scanner->curptr+2) != '0') {
++ if (scanner->curptr+2 >= scanner->end || *(scanner->curptr+2) != '0') {
+ on_scanner_error(scanner);
+ return;
+ }
+@@ -1006,7 +1006,7 @@ static void parse_origin(pj_scanner *scanner, pjmedia_sdp_session *ses,
+ ctx->last_error = PJMEDIA_SDP_EINORIGIN;
+
+ /* check equal sign */
+- if (*(scanner->curptr+1) != '=') {
++ if (scanner->curptr+1 >= scanner->end || *(scanner->curptr+1) != '=') {
+ on_scanner_error(scanner);
+ return;
+ }
+@@ -1052,7 +1052,7 @@ static void parse_time(pj_scanner *scanner, pjmedia_sdp_session *ses,
+ ctx->last_error = PJMEDIA_SDP_EINTIME;
+
+ /* check equal sign */
+- if (*(scanner->curptr+1) != '=') {
++ if (scanner->curptr+1 >= scanner->end || *(scanner->curptr+1) != '=') {
+ on_scanner_error(scanner);
+ return;
+ }
+@@ -1080,7 +1080,7 @@ static void parse_generic_line(pj_scanner *scanner, pj_str_t *str,
+ ctx->last_error = PJMEDIA_SDP_EINSDP;
+
+ /* check equal sign */
+- if (*(scanner->curptr+1) != '=') {
++ if ((scanner->curptr+1 >= scanner->end) || *(scanner->curptr+1) != '=') {
+ on_scanner_error(scanner);
+ return;
+ }
+@@ -1149,7 +1149,7 @@ static void parse_media(pj_scanner *scanner, pjmedia_sdp_media *med,
+ ctx->last_error = PJMEDIA_SDP_EINMEDIA;
+
+ /* check the equal sign */
+- if (*(scanner->curptr+1) != '=') {
++ if (scanner->curptr+1 >= scanner->end || *(scanner->curptr+1) != '=') {
+ on_scanner_error(scanner);
+ return;
+ }
+@@ -1164,6 +1164,10 @@ static void parse_media(pj_scanner *scanner, pjmedia_sdp_media *med,
+ /* port */
+ pj_scan_get(scanner, &cs_token, &str);
+ med->desc.port = (unsigned short)pj_strtoul(&str);
++ if (pj_scan_is_eof(scanner)) {
++ on_scanner_error(scanner);
++ return;
++ }
+ if (*scanner->curptr == '/') {
+ /* port count */
+ pj_scan_get_char(scanner);
+@@ -1175,7 +1179,7 @@ static void parse_media(pj_scanner *scanner, pjmedia_sdp_media *med,
+ }
+
+ if (pj_scan_get_char(scanner) != ' ') {
+- PJ_THROW(SYNTAX_ERROR);
++ on_scanner_error(scanner);
+ }
+
+ /* transport */
+@@ -1183,7 +1187,7 @@ static void parse_media(pj_scanner *scanner, pjmedia_sdp_media *med,
+
+ /* format list */
+ med->desc.fmt_count = 0;
+- while (*scanner->curptr == ' ') {
++ while (scanner->curptr < scanner->end && *scanner->curptr == ' ') {
+ pj_str_t fmt;
+
+ pj_scan_get_char(scanner);
+@@ -1223,7 +1227,7 @@ static pjmedia_sdp_attr *parse_attr( pj_pool_t *pool, pj_scanner *scanner,
+ attr = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_attr);
+
+ /* check equal sign */
+- if (*(scanner->curptr+1) != '=') {
++ if (scanner->curptr+1 >= scanner->end || *(scanner->curptr+1) != '=') {
+ on_scanner_error(scanner);
+ return NULL;
+ }
+@@ -1242,7 +1246,7 @@ static pjmedia_sdp_attr *parse_attr( pj_pool_t *pool, pj_scanner *scanner,
+ pj_scan_get_char(scanner);
+
+ /* get value */
+- if (*scanner->curptr != '\r' && *scanner->curptr != '\n') {
++ if (!pj_scan_is_eof(scanner) && *scanner->curptr != '\r' && *scanner->curptr != '\n') {
+ pj_scan_get_until_chr(scanner, "\r\n", &attr->value);
+ } else {
+ attr->value.ptr = NULL;
+--
+2.25.1
+
diff --git a/third-party/pjproject/patches/0201-potential-stack-buffer-overflow-when-parsing-message-as-a-STUN-client.patch b/third-party/pjproject/patches/0201-potential-stack-buffer-overflow-when-parsing-message-as-a-STUN-client.patch
new file mode 100644
index 0000000..76f02fc
--- /dev/null
+++ b/third-party/pjproject/patches/0201-potential-stack-buffer-overflow-when-parsing-message-as-a-STUN-client.patch
@@ -0,0 +1,44 @@
+From 450baca94f475345542c6953832650c390889202 Mon Sep 17 00:00:00 2001
+From: sauwming <ming at teluu.com>
+Date: Tue, 7 Jun 2022 12:00:13 +0800
+Subject: [PATCH] Merge pull request from GHSA-26j7-ww69-c4qj
+
+---
+ pjlib-util/src/pjlib-util/stun_simple.c | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/pjlib-util/src/pjlib-util/stun_simple.c b/pjlib-util/src/pjlib-util/stun_simple.c
+index 722519584..d0549176d 100644
+--- a/pjlib-util/src/pjlib-util/stun_simple.c
++++ b/pjlib-util/src/pjlib-util/stun_simple.c
+@@ -54,6 +54,7 @@ PJ_DEF(pj_status_t) pjstun_parse_msg( void *buf, pj_size_t buf_len,
+ {
+ pj_uint16_t msg_type, msg_len;
+ char *p_attr;
++ int attr_max_cnt = PJ_ARRAY_SIZE(msg->attr);
+
+ PJ_CHECK_STACK();
+
+@@ -83,7 +84,7 @@ PJ_DEF(pj_status_t) pjstun_parse_msg( void *buf, pj_size_t buf_len,
+ msg->attr_count = 0;
+ p_attr = (char*)buf + sizeof(pjstun_msg_hdr);
+
+- while (msg_len > 0) {
++ while (msg_len > 0 && msg->attr_count < attr_max_cnt) {
+ pjstun_attr_hdr **attr = &msg->attr[msg->attr_count];
+ pj_uint32_t len;
+ pj_uint16_t attr_type;
+@@ -111,6 +112,10 @@ PJ_DEF(pj_status_t) pjstun_parse_msg( void *buf, pj_size_t buf_len,
+ p_attr += len;
+ ++msg->attr_count;
+ }
++ if (msg->attr_count == attr_max_cnt) {
++ PJ_LOG(4, (THIS_FILE, "Warning: max number attribute %d reached.",
++ attr_max_cnt));
++ }
+
+ return PJ_SUCCESS;
+ }
+--
+2.25.1
+
--
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Gerrit-Project: asterisk
Gerrit-Branch: 16
Gerrit-Change-Id: I86fdc003d5d22cb66e7cc6dc3313a8194f27eb69
Gerrit-Change-Number: 19652
Gerrit-PatchSet: 1
Gerrit-Owner: Friendly Automation
Gerrit-CC: Benjamin Keith Ford <bford at digium.com>
Gerrit-MessageType: newchange
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