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pjproject: 2.13 security fixes 

Backports two security fixes (c4d3498 and 450baca) from pjproject 2.13.

ASTERISK-30338

Change-Id: I86fdc003d5d22cb66e7cc6dc3313a8194f27eb69
This commit is contained in:
Ben Ford 2022-11-29 14:02:26 -06:00 committed by Friendly Automation
parent 5741569c5e
commit cbb7585e7d
2 changed files with 350 additions and 0 deletions
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306
third-party/pjproject/patches/0200-potential-buffer-overflow-in-pjlib-scanner-and-pjmedia.patch vendored Normal file
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@ -0,0 +1,306 @@
From c4d34984ec92b3d5252a7d5cddd85a1d3a8001ae Mon Sep 17 00:00:00 2001
From: sauwming <ming@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@gmail.com>
* Use 'pj_scan_is_eof(scanner)'
Co-authored-by: Aaron Lichtman <aaronlichtman@gmail.com>
* Use 'pj_scan_is_eof(scanner)'
Co-authored-by: Aaron Lichtman <aaronlichtman@gmail.com>
* Use `!pj_scan_is_eof` instead of manually checking `scanner->curptr < scanner->end`
Co-authored-by: Maksim Mukosey <mmukosey@gmail.com>
* Update pjlib-util/src/pjlib-util/scanner.c
Co-authored-by: Aaron Lichtman <aaronlichtman@gmail.com>
* Update pjlib-util/src/pjlib-util/scanner.c
Co-authored-by: Aaron Lichtman <aaronlichtman@gmail.com>
* Update pjlib-util/src/pjlib-util/scanner.c
Co-authored-by: Aaron Lichtman <aaronlichtman@gmail.com>
* Revert '>=' back to '>' in pj_scan_stricmp_alnum()
* Fix error compiles.
Co-authored-by: Nanang Izzuddin <nanang@teluu.com>
Co-authored-by: Aaron Lichtman <aaronlichtman@gmail.com>
Co-authored-by: Maksim Mukosey <mmukosey@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

44
third-party/pjproject/patches/0201-potential-stack-buffer-overflow-when-parsing-message-as-a-STUN-client.patch vendored Normal file
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@ -0,0 +1,44 @@
From 450baca94f475345542c6953832650c390889202 Mon Sep 17 00:00:00 2001
From: sauwming <ming@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