sqlite3: fix CVE-2020-13434

CVE: CVE-2020-13434

Reference: https://nvd.nist.gov/vuln/detail/CVE-2020-13434

(From OE-Core rev: 0338c2eb099532eb3b9a9de038f6b1a757348513)

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/sqlite/files/CVE-2020-13434.patch

@@ -0,0 +1,48 @@
+From dd6c33d372f3b83f4fe57904c2bd5ebba5c38018 Mon Sep 17 00:00:00 2001
+From: drh <drh@noemail.net>
+Date: Sat, 23 May 2020 19:58:07 +0000
+Subject: [PATCH] Limit the "precision" of floating-point to text conversions
+ in the printf() function to 100,000,000.  Fix for ticket [23439ea582241138].
+
+FossilOrigin-Name: d08d3405878d394e08e5d3af281246edfbd81ca74cc8d16458808591512fb93d
+
+Upstream-Status: Backport
+CVE: CVE-2020-13434
+
+Reference to upstream patch:
+https://github.com/sqlite/sqlite/commit/dd6c33d372f3b83f4fe57904c2bd5ebba5c38018
+
+Patch converted to amalgamation format
+
+Signed-off-by: Steve Sakoman <steve@sakoman.com>
+---
+diff --git a/sqlite3.c b/sqlite3.c
+index 55dc686..5ff2c14 100644
+--- a/sqlite3.c
++++ b/sqlite3.c
+@@ -28147,6 +28147,13 @@ static char *printfTempBuf(sqlite3_str *pAccum, sqlite3_int64 n){
+ #endif
+ #define etBUFSIZE SQLITE_PRINT_BUF_SIZE  /* Size of the output buffer */
+ 
++/*
++** Hard limit on the precision of floating-point conversions.
++*/
++#ifndef SQLITE_PRINTF_PRECISION_LIMIT
++# define SQLITE_FP_PRECISION_LIMIT 100000000
++#endif
++
+ /*
+ ** Render a string given by "fmt" into the StrAccum object.
+ */
+@@ -28468,6 +28475,11 @@ SQLITE_API void sqlite3_str_vappendf(
+         length = 0;
+ #else
+         if( precision<0 ) precision = 6;         /* Set default precision */
++#ifdef SQLITE_FP_PRECISION_LIMIT
++        if( precision>SQLITE_FP_PRECISION_LIMIT ){
++          precision = SQLITE_FP_PRECISION_LIMIT;
++        }
++#endif
+         if( realvalue<0.0 ){
+           realvalue = -realvalue;
+           prefix = '-';

meta/recipes-support/sqlite/sqlite3_3.31.1.bb

@@ -8,6 +8,7 @@ SRC_URI = "http://www.sqlite.org/2020/sqlite-autoconf-${SQLITE_PV}.tar.gz \
            file://CVE-2020-11656.patch \
            file://CVE-2020-11655.patch \
            file://CVE-2020-15358.patch \
+           file://CVE-2020-13434.patch \
            "
 SRC_URI[md5sum] = "2d0a553534c521504e3ac3ad3b90f125"
 SRC_URI[sha256sum] = "62284efebc05a76f909c580ffa5c008a7d22a1287285d68b7825a2b6b51949ae"