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-rw-r--r--php-bug76450.patch208
1 files changed, 208 insertions, 0 deletions
diff --git a/php-bug76450.patch b/php-bug76450.patch
new file mode 100644
index 0000000..e1cffa6
--- /dev/null
+++ b/php-bug76450.patch
@@ -0,0 +1,208 @@
+From 18aadb2d10b70f40f67b3fa233f67f366d7d2572 Mon Sep 17 00:00:00 2001
+From: "Christoph M. Becker" <cmbecker69@gmx.de>
+Date: Wed, 5 May 2021 12:42:17 +0200
+Subject: [PATCH 3/7] Fix #76452: Crash while parsing blob data in
+ firebird_fetch_blob
+
+We need to prevent integer overflow when calling `erealloc()` with
+`len+1`.
+
+(cherry picked from commit 286162e9b03071c4308e7e92597bca4239f49d89)
+---
+ ext/pdo_firebird/firebird_statement.c | 5 +++++
+ ext/pdo_firebird/tests/bug_76452.data | Bin 0 -> 856 bytes
+ ext/pdo_firebird/tests/bug_76452.phpt | 31 ++++++++++++++++++++++++++
+ 3 files changed, 36 insertions(+)
+ create mode 100644 ext/pdo_firebird/tests/bug_76452.data
+ create mode 100644 ext/pdo_firebird/tests/bug_76452.phpt
+
+diff --git a/ext/pdo_firebird/firebird_statement.c b/ext/pdo_firebird/firebird_statement.c
+index 1c0f5b6071..c5e6b684c3 100644
+--- a/ext/pdo_firebird/firebird_statement.c
++++ b/ext/pdo_firebird/firebird_statement.c
+@@ -294,6 +294,11 @@ static int firebird_fetch_blob(pdo_stmt_t *stmt, int colno, char **ptr, /* {{{ *
+ unsigned short seg_len;
+ ISC_STATUS stat;
+
++ /* prevent overflow */
++ if (*len == ZEND_ULONG_MAX) {
++ result = 0;
++ goto fetch_blob_end;
++ }
+ *ptr = S->fetch_buf[colno] = erealloc(S->fetch_buf[colno], *len+1);
+
+ for (cur_len = stat = 0; (!stat || stat == isc_segment) && cur_len < *len; cur_len += seg_len) {
+
+From e968635df5b42b9358c08f3c57bf15f24e4de62e Mon Sep 17 00:00:00 2001
+From: "Christoph M. Becker" <cmbecker69@gmx.de>
+Date: Fri, 30 Apr 2021 14:10:50 +0200
+Subject: [PATCH 4/7] Fix #76450: SIGSEGV in firebird_stmt_execute
+
+We need to verify that the `result_size` is not larger than our buffer,
+and also should make sure that the `len` which is passed to
+`isc_vax_integer()` has a permissible value; otherwise we bail out.
+
+(cherry picked from commit bcbf8aa0c96d8d9e81ec3428232485555fae0b37)
+---
+ ext/pdo_firebird/firebird_statement.c | 7 +++++++
+ ext/pdo_firebird/tests/bug_76450.data | Bin 0 -> 464 bytes
+ ext/pdo_firebird/tests/bug_76450.phpt | 29 ++++++++++++++++++++++++++
+ 3 files changed, 36 insertions(+)
+ create mode 100644 ext/pdo_firebird/tests/bug_76450.data
+ create mode 100644 ext/pdo_firebird/tests/bug_76450.phpt
+
+diff --git a/ext/pdo_firebird/firebird_statement.c b/ext/pdo_firebird/firebird_statement.c
+index c5e6b684c3..bdde6c7cf2 100644
+--- a/ext/pdo_firebird/firebird_statement.c
++++ b/ext/pdo_firebird/firebird_statement.c
+@@ -133,8 +133,14 @@ static int firebird_stmt_execute(pdo_stmt_t *stmt) /* {{{ */
+ }
+ if (result[0] == isc_info_sql_records) {
+ unsigned i = 3, result_size = isc_vax_integer(&result[1], 2);
++ if (result_size > sizeof(result)) {
++ goto error;
++ }
+ while (result[i] != isc_info_end && i < result_size) {
+ short len = (short) isc_vax_integer(&result[i + 1], 2);
++ if (len != 1 && len != 2 && len != 4) {
++ goto error;
++ }
+ if (result[i] != isc_info_req_select_count) {
+ affected_rows += isc_vax_integer(&result[i + 3], len);
+ }
+@@ -158,6 +164,7 @@ static int firebird_stmt_execute(pdo_stmt_t *stmt) /* {{{ */
+ return 1;
+ } while (0);
+
++error:
+ RECORD_ERROR(stmt);
+
+ return 0;
+
+From 6c114f1907051632e02cdc45de8b4b249d84e7df Mon Sep 17 00:00:00 2001
+From: "Christoph M. Becker" <cmbecker69@gmx.de>
+Date: Fri, 30 Apr 2021 13:53:21 +0200
+Subject: [PATCH 5/7] Fix #76449: SIGSEGV in firebird_handle_doer
+
+We need to verify that the `result_size` is not larger than our buffer,
+and also should make sure that the `len` which is passed to
+`isc_vax_integer()` has a permissible value; otherwise we bail out.
+
+(cherry picked from commit 08da7c73726f7b86b67d6f0ff87c73c585a7834a)
+---
+ ext/pdo_firebird/firebird_driver.c | 9 +++++++++
+ ext/pdo_firebird/tests/bug_76449.data | Bin 0 -> 464 bytes
+ ext/pdo_firebird/tests/bug_76449.phpt | 23 +++++++++++++++++++++++
+ 3 files changed, 32 insertions(+)
+ create mode 100644 ext/pdo_firebird/tests/bug_76449.data
+ create mode 100644 ext/pdo_firebird/tests/bug_76449.phpt
+
+diff --git a/ext/pdo_firebird/firebird_driver.c b/ext/pdo_firebird/firebird_driver.c
+index 3060615e8d..c9f90fdef1 100644
+--- a/ext/pdo_firebird/firebird_driver.c
++++ b/ext/pdo_firebird/firebird_driver.c
+@@ -206,8 +206,17 @@ static zend_long firebird_handle_doer(pdo_dbh_t *dbh, const char *sql, size_t sq
+ if (result[0] == isc_info_sql_records) {
+ unsigned i = 3, result_size = isc_vax_integer(&result[1],2);
+
++ if (result_size > sizeof(result)) {
++ ret = -1;
++ goto free_statement;
++ }
+ while (result[i] != isc_info_end && i < result_size) {
+ short len = (short)isc_vax_integer(&result[i+1],2);
++ /* bail out on bad len */
++ if (len != 1 && len != 2 && len != 4) {
++ ret = -1;
++ goto free_statement;
++ }
+ if (result[i] != isc_info_req_select_count) {
+ ret += isc_vax_integer(&result[i+3],len);
+ }
+
+From c9bdb0c993a079102ce854ef7859087170e7b9a1 Mon Sep 17 00:00:00 2001
+From: "Christoph M. Becker" <cmbecker69@gmx.de>
+Date: Thu, 29 Apr 2021 15:26:22 +0200
+Subject: [PATCH 6/7] Fix #76448: Stack buffer overflow in firebird_info_cb
+
+We ensure not to overflow the stack allocated buffer by using `strlcat`.
+
+(cherry picked from commit 67afa32541ebc4abbf633cb1e7e879b2fbb616ad)
+---
+ ext/pdo_firebird/firebird_driver.c | 8 +++++---
+ ext/pdo_firebird/tests/bug_76448.data | Bin 0 -> 749 bytes
+ ext/pdo_firebird/tests/bug_76448.phpt | 23 +++++++++++++++++++++++
+ 3 files changed, 28 insertions(+), 3 deletions(-)
+ create mode 100644 ext/pdo_firebird/tests/bug_76448.data
+ create mode 100644 ext/pdo_firebird/tests/bug_76448.phpt
+
+diff --git a/ext/pdo_firebird/firebird_driver.c b/ext/pdo_firebird/firebird_driver.c
+index c9f90fdef1..1e2e7746fa 100644
+--- a/ext/pdo_firebird/firebird_driver.c
++++ b/ext/pdo_firebird/firebird_driver.c
+@@ -509,14 +509,16 @@ static int firebird_handle_set_attribute(pdo_dbh_t *dbh, zend_long attr, zval *v
+ }
+ /* }}} */
+
++#define INFO_BUF_LEN 512
++
+ /* callback to used to report database server info */
+ static void firebird_info_cb(void *arg, char const *s) /* {{{ */
+ {
+ if (arg) {
+ if (*(char*)arg) { /* second call */
+- strcat(arg, " ");
++ strlcat(arg, " ", INFO_BUF_LEN);
+ }
+- strcat(arg, s);
++ strlcat(arg, s, INFO_BUF_LEN);
+ }
+ }
+ /* }}} */
+@@ -527,7 +529,7 @@ static int firebird_handle_get_attribute(pdo_dbh_t *dbh, zend_long attr, zval *v
+ pdo_firebird_db_handle *H = (pdo_firebird_db_handle *)dbh->driver_data;
+
+ switch (attr) {
+- char tmp[512];
++ char tmp[INFO_BUF_LEN];
+
+ case PDO_ATTR_AUTOCOMMIT:
+ ZVAL_LONG(val,dbh->auto_commit);
+
+From 7598733c51af30611aa64e456c9a777069d2efb9 Mon Sep 17 00:00:00 2001
+From: Stanislav Malyshev <stas@php.net>
+Date: Sun, 20 Jun 2021 22:20:38 -0700
+Subject: [PATCH 7/7] Update NEWS
+
+(cherry picked from commit c68a687566591e2268f35d124a90c7d556ce968b)
+---
+ NEWS | 13 +++++++++++++
+ 1 file changed, 13 insertions(+)
+
+diff --git a/NEWS b/NEWS
+index e331598176..f083e44dcc 100644
+--- a/NEWS
++++ b/NEWS
+@@ -1,6 +1,19 @@
+ PHP NEWS
+ |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
+
++Backported from 7.3.29
++
++- Core:
++ . Fixed #81122: SSRF bypass in FILTER_VALIDATE_URL. (CVE-2021-21705) (cmb)
++
++- PDO_Firebird:
++ . Fixed #76448: Stack buffer overflow in firebird_info_cb. (CVE-2021-21704)
++ (cmb)
++ . Fixed #76449: SIGSEGV in firebird_handle_doer. (CVE-2021-21704) (cmb)
++ . Fixed #76450: SIGSEGV in firebird_stmt_execute. (CVE-2021-21704) (cmb)
++ . Fixed #76452: Crash while parsing blob data in firebird_fetch_blob.
++ (CVE-2021-21704) (cmb)
++
+ Backported from 7.3.28
+
+ - Imap:
+--
+2.31.1
+
generated by cgit (git 2.34.1) at 2024-11-17 23:44:30 +0000