diff options
| -rw-r--r-- | ext/gd/libgd/gd_gd2.c | 8 | ||||
| -rw-r--r-- | ext/gd/tests/bug73868.gd2 | bin | 0 -> 1050 bytes | |||
| -rw-r--r-- | ext/gd/tests/bug73868.phpt | 18 |
3 files changed, 24 insertions, 2 deletions
diff --git a/ext/gd/libgd/gd_gd2.c b/ext/gd/libgd/gd_gd2.c index d06f328425..196b7858dc 100644 --- a/ext/gd/libgd/gd_gd2.c +++ b/ext/gd/libgd/gd_gd2.c @@ -340,12 +340,16 @@ gdImagePtr gdImageCreateFromGd2Ctx (gdIOCtxPtr in) for (x = xlo; x < xhi; x++) { if (im->trueColor) { if (!gdGetInt(&im->tpixels[y][x], in)) { - im->tpixels[y][x] = 0; + php_gd_error("gd2: EOF while reading\n"); + gdImageDestroy(im); + return NULL; } } else { int ch; if (!gdGetByte(&ch, in)) { - ch = 0; + php_gd_error("gd2: EOF while reading\n"); + gdImageDestroy(im); + return NULL; } im->pixels[y][x] = ch; } diff --git a/ext/gd/tests/bug73868.gd2 b/ext/gd/tests/bug73868.gd2 Binary files differnew file mode 100644 index 0000000000..1c797d1acf --- /dev/null +++ b/ext/gd/tests/bug73868.gd2 diff --git a/ext/gd/tests/bug73868.phpt b/ext/gd/tests/bug73868.phpt new file mode 100644 index 0000000000..135be7917b --- /dev/null +++ b/ext/gd/tests/bug73868.phpt @@ -0,0 +1,18 @@ +--TEST-- +Bug 73868 (DOS vulnerability in gdImageCreateFromGd2Ctx()) +--SKIPIF-- +<?php +if (!extension_loaded('gd')) die('skip gd extension not available'); +?> +--FILE-- +<?php +var_dump(imagecreatefromgd2(__DIR__ . DIRECTORY_SEPARATOR . 'bug73868.gd2')); +?> +===DONE=== +--EXPECTF-- +Warning: imagecreatefromgd2(): gd2: EOF while reading + in %s on line %d + +Warning: imagecreatefromgd2(): '%s' is not a valid GD2 file in %s on line %d +bool(false) +===DONE=== |