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From 0a651c02701268532a9754542f629af85e28ae02 Mon Sep 17 00:00:00 2001
From: Niels Dossche <7771979+nielsdos@users.noreply.github.com>
Date: Fri, 8 Nov 2024 22:04:21 +0100
Subject: [PATCH 6/9] Fix GHSA-r977-prxv-hc43
Move the bound check upwards. Since this doesn't generate output we can
check the bound first.
(cherry picked from commit 81030c9bbb5cd2e740b8398bb7212df9709f0274)
(cherry picked from commit 2cee10a1206f5bc7724232d3988be2cfcb0bc9df)
(cherry picked from commit 44a5975f83a02eb8169d12af912e6222b28216d0)
(cherry picked from commit 7065fa31a468139f07b40f7036ce4761037dafd2)
---
ext/standard/filters.c | 7 ++++---
ext/standard/tests/filters/ghsa-r977-prxv-hc43.phpt | 12 ++++++++++++
2 files changed, 16 insertions(+), 3 deletions(-)
create mode 100644 ext/standard/tests/filters/ghsa-r977-prxv-hc43.phpt
diff --git a/ext/standard/filters.c b/ext/standard/filters.c
index 03e5e11df8..26850c46a8 100644
--- a/ext/standard/filters.c
+++ b/ext/standard/filters.c
@@ -1122,6 +1122,9 @@ static php_conv_err_t php_conv_qprint_decode_convert(php_conv_qprint_decode *ins
} break;
case 5: {
+ if (icnt == 0) {
+ goto out;
+ }
if (!inst->lbchars && lb_cnt == 1 && *ps == '\n') {
/* auto-detect soft line breaks, found network line break */
lb_cnt = lb_ptr = 0;
@@ -1135,15 +1138,13 @@ static php_conv_err_t php_conv_qprint_decode_convert(php_conv_qprint_decode *ins
/* soft line break */
lb_cnt = lb_ptr = 0;
scan_stat = 0;
- } else if (icnt > 0) {
+ } else {
if (*ps == (unsigned char)inst->lbchars[lb_cnt]) {
lb_cnt++;
ps++, icnt--;
} else {
scan_stat = 6; /* no break for short-cut */
}
- } else {
- goto out;
}
} break;
diff --git a/ext/standard/tests/filters/ghsa-r977-prxv-hc43.phpt b/ext/standard/tests/filters/ghsa-r977-prxv-hc43.phpt
new file mode 100644
index 0000000000..8fdcce8ff2
--- /dev/null
+++ b/ext/standard/tests/filters/ghsa-r977-prxv-hc43.phpt
@@ -0,0 +1,12 @@
+--TEST--
+GHSA-r977-prxv-hc43: Single byte overread with convert.quoted-printable-decode filter
+--FILE--
+<?php
+
+$input_data = str_repeat('A', 8189)."X=\r";
+$filter_url = "php://filter/convert.quoted-printable-decode/resource=data:," . urlencode($input_data);
+var_dump(file_get_contents($filter_url));
+
+?>
+--EXPECT--
+string(8190) "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA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--
2.47.0
From d149a44b005e0d24208b0bd0f7179dfbbfffefb1 Mon Sep 17 00:00:00 2001
From: "Christoph M. Becker" <cmbecker69@gmx.de>
Date: Mon, 8 Jun 2020 23:19:43 +0200
Subject: [PATCH 7/9] Fix #74267: segfault with streams and invalid data
If the current character is a line break character, it cannot be a tab
or space character, so we would always fail with an invalid sequence
error. Obviously, these `scan_stat == 4` conditions are meant to be
exclusive.
Furthermore, if `in_pp == NULL || in_left_p == NULL` is true, we hit a
segfault if we are not returning right away. Obviously, the additional
constraints don't make sense, so we remove them.
(cherry picked from commit 12c59f6660706321f9d42c55421ff6864439c8b7)
---
ext/standard/filters.c | 7 +++----
ext/standard/tests/filters/bug74267.phpt | 26 ++++++++++++++++++++++++
2 files changed, 29 insertions(+), 4 deletions(-)
create mode 100644 ext/standard/tests/filters/bug74267.phpt
diff --git a/ext/standard/filters.c b/ext/standard/filters.c
index 26850c46a8..2b58c65ea5 100644
--- a/ext/standard/filters.c
+++ b/ext/standard/filters.c
@@ -788,7 +788,7 @@ static php_conv_err_t php_conv_qprint_encode_convert(php_conv_qprint_encode *ins
lb_ptr = inst->lb_ptr;
lb_cnt = inst->lb_cnt;
- if ((in_pp == NULL || in_left_p == NULL) && (lb_ptr >=lb_cnt)) {
+ if (in_pp == NULL || in_left_p == NULL) {
return PHP_CONV_ERR_SUCCESS;
}
@@ -1016,7 +1016,7 @@ static php_conv_err_t php_conv_qprint_decode_convert(php_conv_qprint_decode *ins
lb_ptr = inst->lb_ptr;
lb_cnt = inst->lb_cnt;
- if ((in_pp == NULL || in_left_p == NULL) && lb_cnt == lb_ptr) {
+ if (in_pp == NULL || in_left_p == NULL) {
if (inst->scan_stat != 0) {
return PHP_CONV_ERR_UNEXPECTED_EOS;
}
@@ -1113,8 +1113,7 @@ static php_conv_err_t php_conv_qprint_decode_convert(php_conv_qprint_decode *ins
*ps == (unsigned char)inst->lbchars[lb_cnt]) {
lb_cnt++;
scan_stat = 5;
- }
- if (*ps != '\t' && *ps != ' ') {
+ } else if (*ps != '\t' && *ps != ' ') {
err = PHP_CONV_ERR_INVALID_SEQ;
goto out;
}
diff --git a/ext/standard/tests/filters/bug74267.phpt b/ext/standard/tests/filters/bug74267.phpt
new file mode 100644
index 0000000000..17d7996b7f
--- /dev/null
+++ b/ext/standard/tests/filters/bug74267.phpt
@@ -0,0 +1,26 @@
+--TEST--
+Bug #74267 (segfault with streams and invalid data)
+--FILE--
+<?php
+$stream = fopen('php://memory', 'w');
+stream_filter_append($stream, 'convert.quoted-printable-decode', STREAM_FILTER_WRITE, ['line-break-chars' => "\r\n"]);
+
+$lines = [
+ "\r\n",
+ " -=()\r\n",
+ " -=\r\n",
+ "\r\n"
+ ];
+
+foreach ($lines as $line) {
+ fwrite($stream, $line);
+}
+
+fclose($stream);
+echo "done\n";
+?>
+--EXPECTF--
+Warning: fwrite(): stream filter (convert.quoted-printable-decode): invalid byte sequence in %s on line %d
+
+Warning: fwrite(): stream filter (convert.quoted-printable-decode): invalid byte sequence in %s on line %d
+done
--
2.47.0
|
