From 9fc410f3ecdc790c30599ea74cc9d74a8792115d Mon Sep 17 00:00:00 2001 From: Omar Vega Ramos Date: Fri, 3 Apr 2020 14:03:34 -0500 Subject: sdl-1.2.15-13.parabola1: rebuild --- ...75-Fix-a-buffer-overwrite-in-MS_ADPCM_dec.patch | 84 ++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 libre/sdl/SDL-1.2.15-CVE-2019-7575-Fix-a-buffer-overwrite-in-MS_ADPCM_dec.patch (limited to 'libre/sdl/SDL-1.2.15-CVE-2019-7575-Fix-a-buffer-overwrite-in-MS_ADPCM_dec.patch') diff --git a/libre/sdl/SDL-1.2.15-CVE-2019-7575-Fix-a-buffer-overwrite-in-MS_ADPCM_dec.patch b/libre/sdl/SDL-1.2.15-CVE-2019-7575-Fix-a-buffer-overwrite-in-MS_ADPCM_dec.patch new file mode 100644 index 000000000..53965aa2f --- /dev/null +++ b/libre/sdl/SDL-1.2.15-CVE-2019-7575-Fix-a-buffer-overwrite-in-MS_ADPCM_dec.patch @@ -0,0 +1,84 @@ +From e1f80cadb079e35103e6eebf160a818815c823df Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= +Date: Thu, 14 Feb 2019 14:51:52 +0100 +Subject: [PATCH] CVE-2019-7575: Fix a buffer overwrite in MS_ADPCM_decode +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +If a WAV format defines shorter audio stream and decoded MS ADPCM data chunk +is longer, decoding continued past the output audio buffer. + +This fix is based on a patch from +. + +https://bugzilla.libsdl.org/show_bug.cgi?id=4493 +CVE-2019-7575 + +Signed-off-by: Petr Písař +--- + src/audio/SDL_wave.c | 13 ++++++++----- + 1 file changed, 8 insertions(+), 5 deletions(-) + +diff --git a/src/audio/SDL_wave.c b/src/audio/SDL_wave.c +index e42d01c..b6c49de 100644 +--- a/src/audio/SDL_wave.c ++++ b/src/audio/SDL_wave.c +@@ -115,7 +115,7 @@ static Sint32 MS_ADPCM_nibble(struct MS_ADPCM_decodestate *state, + static int MS_ADPCM_decode(Uint8 **audio_buf, Uint32 *audio_len) + { + struct MS_ADPCM_decodestate *state[2]; +- Uint8 *freeable, *encoded, *encoded_end, *decoded; ++ Uint8 *freeable, *encoded, *encoded_end, *decoded, *decoded_end; + Sint32 encoded_len, samplesleft; + Sint8 nybble, stereo; + Sint16 *coeff[2]; +@@ -135,6 +135,7 @@ static int MS_ADPCM_decode(Uint8 **audio_buf, Uint32 *audio_len) + return(-1); + } + decoded = *audio_buf; ++ decoded_end = decoded + *audio_len; + + /* Get ready... Go! */ + stereo = (MS_ADPCM_state.wavefmt.channels == 2); +@@ -142,7 +143,7 @@ static int MS_ADPCM_decode(Uint8 **audio_buf, Uint32 *audio_len) + state[1] = &MS_ADPCM_state.state[stereo]; + while ( encoded_len >= MS_ADPCM_state.wavefmt.blockalign ) { + /* Grab the initial information for this block */ +- if (encoded + 7 + (stereo ? 7 : 0) > encoded_end) goto too_short; ++ if (encoded + 7 + (stereo ? 7 : 0) > encoded_end) goto invalid_size; + state[0]->hPredictor = *encoded++; + if ( stereo ) { + state[1]->hPredictor = *encoded++; +@@ -169,6 +170,7 @@ static int MS_ADPCM_decode(Uint8 **audio_buf, Uint32 *audio_len) + coeff[1] = MS_ADPCM_state.aCoeff[state[1]->hPredictor]; + + /* Store the two initial samples we start with */ ++ if (decoded + 4 + (stereo ? 4 : 0) > decoded_end) goto invalid_size; + decoded[0] = state[0]->iSamp2&0xFF; + decoded[1] = state[0]->iSamp2>>8; + decoded += 2; +@@ -190,7 +192,8 @@ static int MS_ADPCM_decode(Uint8 **audio_buf, Uint32 *audio_len) + samplesleft = (MS_ADPCM_state.wSamplesPerBlock-2)* + MS_ADPCM_state.wavefmt.channels; + while ( samplesleft > 0 ) { +- if (encoded + 1 > encoded_end) goto too_short; ++ if (encoded + 1 > encoded_end) goto invalid_size; ++ if (decoded + 4 > decoded_end) goto invalid_size; + + nybble = (*encoded)>>4; + new_sample = MS_ADPCM_nibble(state[0],nybble,coeff[0]); +@@ -213,8 +216,8 @@ static int MS_ADPCM_decode(Uint8 **audio_buf, Uint32 *audio_len) + } + SDL_free(freeable); + return(0); +-too_short: +- SDL_SetError("Too short chunk for a MS ADPCM decoder"); ++invalid_size: ++ SDL_SetError("Unexpected chunk length for a MS ADPCM decoder"); + SDL_free(freeable); + return(-1); + } +-- +2.20.1 + -- cgit v1.2.3