https://github.com/uclouvain/openjpeg/commit/dcac91b8c72f743bda7dbfa9032356bc8110098a.patch http://openwall.com/lists/oss-security/2017/09/06/3 From dcac91b8c72f743bda7dbfa9032356bc8110098a Mon Sep 17 00:00:00 2001 From: Even Rouault Date: Wed, 16 Aug 2017 17:09:10 +0200 Subject: [PATCH] opj_j2k_write_sot(): fix potential write heap buffer overflow (#991) --- src/lib/openjp2/j2k.c | 25 ++++++++++++++++++++----- 1 file changed, 20 insertions(+), 5 deletions(-) diff --git a/src/lib/openjp2/j2k.c b/src/lib/openjp2/j2k.c index 54b490a8c..16915452e 100644 --- a/src/lib/openjp2/j2k.c +++ b/src/lib/openjp2/j2k.c @@ -832,13 +832,15 @@ static OPJ_BOOL opj_j2k_write_tlm(opj_j2k_t *p_j2k, * Writes the SOT marker (Start of tile-part) * * @param p_j2k J2K codec. - * @param p_data FIXME DOC - * @param p_data_written FIXME DOC + * @param p_data Output buffer + * @param p_total_data_size Output buffer size + * @param p_data_written Number of bytes written into stream * @param p_stream the stream to write data to. * @param p_manager the user event manager. */ static OPJ_BOOL opj_j2k_write_sot(opj_j2k_t *p_j2k, OPJ_BYTE * p_data, + OPJ_UINT32 p_total_data_size, OPJ_UINT32 * p_data_written, const opj_stream_private_t *p_stream, opj_event_mgr_t * p_manager); @@ -4201,6 +4203,7 @@ static OPJ_BOOL opj_j2k_write_tlm(opj_j2k_t *p_j2k, static OPJ_BOOL opj_j2k_write_sot(opj_j2k_t *p_j2k, OPJ_BYTE * p_data, + OPJ_UINT32 p_total_data_size, OPJ_UINT32 * p_data_written, const opj_stream_private_t *p_stream, opj_event_mgr_t * p_manager @@ -4214,6 +4217,12 @@ static OPJ_BOOL opj_j2k_write_sot(opj_j2k_t *p_j2k, OPJ_UNUSED(p_stream); OPJ_UNUSED(p_manager); + if (p_total_data_size < 12) { + opj_event_msg(p_manager, EVT_ERROR, + "Not enough bytes in output buffer to write SOT marker\n"); + return OPJ_FALSE; + } + opj_write_bytes(p_data, J2K_MS_SOT, 2); /* SOT */ p_data += 2; @@ -11480,7 +11489,8 @@ static OPJ_BOOL opj_j2k_write_first_tile_part(opj_j2k_t *p_j2k, l_current_nb_bytes_written = 0; l_begin_data = p_data; - if (! opj_j2k_write_sot(p_j2k, p_data, &l_current_nb_bytes_written, p_stream, + if (! opj_j2k_write_sot(p_j2k, p_data, p_total_data_size, + &l_current_nb_bytes_written, p_stream, p_manager)) { return OPJ_FALSE; } @@ -11572,7 +11582,10 @@ static OPJ_BOOL opj_j2k_write_all_tile_parts(opj_j2k_t *p_j2k, l_part_tile_size = 0; l_begin_data = p_data; - if (! opj_j2k_write_sot(p_j2k, p_data, &l_current_nb_bytes_written, p_stream, + if (! opj_j2k_write_sot(p_j2k, p_data, + p_total_data_size, + &l_current_nb_bytes_written, + p_stream, p_manager)) { return OPJ_FALSE; } @@ -11615,7 +11628,9 @@ static OPJ_BOOL opj_j2k_write_all_tile_parts(opj_j2k_t *p_j2k, l_part_tile_size = 0; l_begin_data = p_data; - if (! opj_j2k_write_sot(p_j2k, p_data, &l_current_nb_bytes_written, p_stream, + if (! opj_j2k_write_sot(p_j2k, p_data, + p_total_data_size, + &l_current_nb_bytes_written, p_stream, p_manager)) { return OPJ_FALSE; }