wok annotate advancecomp/stuff/CVE-2019-9210.patch @ rev 25460

Update sourceforge.net web_sites with https://
author Pascal Bellard <pascal.bellard@slitaz.org>
date Wed Sep 28 08:10:35 2022 +0000 (2022-09-28)
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pascal@24695 1 commit 7894a6e684ce68ddff9f4f4919ab8e3911ac8040
pascal@24695 2 Author: Andrea Mazzoleni <amadvance@gmail.com>
pascal@24695 3 Date: Fri Jan 4 20:49:48 2019 +0100
pascal@24695 4
pascal@24695 5 Fix a buffer overflow caused by invalid chunks
pascal@24695 6
pascal@24695 7 diff --git a/pngex.cc b/pngex.cc
pascal@24695 8 index 55d16f5..3f5b49f 100644
pascal@24695 9 --- a/pngex.cc
pascal@24695 10 +++ b/pngex.cc
pascal@24695 11 @@ -163,6 +163,10 @@ void png_print_chunk(unsigned type, unsigned char* data, unsigned size)
pascal@24695 12
pascal@24695 13 switch (type) {
pascal@24695 14 case ADV_MNG_CN_MHDR :
pascal@24695 15 + if (size < 28) {
pascal@24695 16 + cout << " invalid chunk size";
pascal@24695 17 + break;
pascal@24695 18 + }
pascal@24695 19 cout << " width:" << be_uint32_read(data+0) << " height:" << be_uint32_read(data+4) << " frequency:" << be_uint32_read(data+8);
pascal@24695 20 cout << " simplicity:" << be_uint32_read(data+24);
pascal@24695 21 cout << "(bit";
pascal@24695 22 @@ -174,6 +178,10 @@ void png_print_chunk(unsigned type, unsigned char* data, unsigned size)
pascal@24695 23 cout << ")";
pascal@24695 24 break;
pascal@24695 25 case ADV_MNG_CN_DHDR :
pascal@24695 26 + if (size < 4) {
pascal@24695 27 + cout << " invalid chunk size";
pascal@24695 28 + break;
pascal@24695 29 + }
pascal@24695 30 cout << " id:" << be_uint16_read(data+0);
pascal@24695 31 switch (data[2]) {
pascal@24695 32 case 0 : cout << " img:unspecified"; break;
pascal@24695 33 @@ -243,6 +251,10 @@ void png_print_chunk(unsigned type, unsigned char* data, unsigned size)
pascal@24695 34 }
pascal@24695 35 break;
pascal@24695 36 case ADV_MNG_CN_DEFI :
pascal@24695 37 + if (size < 2) {
pascal@24695 38 + cout << " invalid chunk size";
pascal@24695 39 + break;
pascal@24695 40 + }
pascal@24695 41 cout << " id:" << be_uint16_read(data+0);
pascal@24695 42 if (size >= 3) {
pascal@24695 43 switch (data[2]) {
pascal@24695 44 @@ -266,6 +278,10 @@ void png_print_chunk(unsigned type, unsigned char* data, unsigned size)
pascal@24695 45 }
pascal@24695 46 break;
pascal@24695 47 case ADV_MNG_CN_MOVE :
pascal@24695 48 + if (size < 13) {
pascal@24695 49 + cout << " invalid chunk size";
pascal@24695 50 + break;
pascal@24695 51 + }
pascal@24695 52 cout << " id_from:" << be_uint16_read(data+0) << " id_to:" << be_uint16_read(data+2);
pascal@24695 53 switch (data[4]) {
pascal@24695 54 case 0 : cout << " type:replace"; break;
pascal@24695 55 @@ -275,6 +291,10 @@ void png_print_chunk(unsigned type, unsigned char* data, unsigned size)
pascal@24695 56 cout << " x:" << (int)be_uint32_read(data + 5) << " y:" << (int)be_uint32_read(data + 9);
pascal@24695 57 break;
pascal@24695 58 case ADV_MNG_CN_PPLT :
pascal@24695 59 + if (size < 1) {
pascal@24695 60 + cout << " invalid chunk size";
pascal@24695 61 + break;
pascal@24695 62 + }
pascal@24695 63 switch (data[0]) {
pascal@24695 64 case 0 : cout << " type:replacement_rgb"; break;
pascal@24695 65 case 1 : cout << " type:delta_rgb"; break;
pascal@24695 66 @@ -285,7 +305,7 @@ void png_print_chunk(unsigned type, unsigned char* data, unsigned size)
pascal@24695 67 default : cout << " type:?"; break;
pascal@24695 68 }
pascal@24695 69 i = 1;
pascal@24695 70 - while (i<size) {
pascal@24695 71 + while (i + 1 < size) {
pascal@24695 72 unsigned ssize;
pascal@24695 73 cout << " " << (unsigned)data[i] << ":" << (unsigned)data[i+1];
pascal@24695 74 if (data[0] == 0 || data[1] == 1)
pascal@24695 75 @@ -298,6 +318,10 @@ void png_print_chunk(unsigned type, unsigned char* data, unsigned size)
pascal@24695 76 }
pascal@24695 77 break;
pascal@24695 78 case ADV_PNG_CN_IHDR :
pascal@24695 79 + if (size < 13) {
pascal@24695 80 + cout << " invalid chunk size";
pascal@24695 81 + break;
pascal@24695 82 + }
pascal@24695 83 cout << " width:" << be_uint32_read(data) << " height:" << be_uint32_read(data + 4);
pascal@24695 84 cout << " depth:" << (unsigned)data[8];
pascal@24695 85 cout << " color_type:" << (unsigned)data[9];
pascal@24695 86 diff -up advancecomp-2.1/lib/png.c.me advancecomp-2.1/lib/png.c
pascal@24695 87 --- advancecomp-2.1/lib/png.c.me 2019-03-06 21:38:19.099210846 +0100
pascal@24695 88 +++ advancecomp-2.1/lib/png.c 2019-03-06 21:38:49.193040592 +0100
pascal@24695 89 @@ -655,6 +655,11 @@ adv_error adv_png_read_ihdr(
pascal@24695 90 }
pascal@24695 91 *pix_pixel = pixel;
pascal@24695 92
pascal@24695 93 + if (width_align < width) {
pascal@24695 94 + error_unsupported_set("Invalid image size");
pascal@24695 95 + goto err;
pascal@24695 96 + }
pascal@24695 97 +
pascal@24695 98 if (data[10] != 0) { /* compression */
pascal@24695 99 error_unsupported_set("Unsupported compression, %d instead of 0", (unsigned)data[10]);
pascal@24695 100 goto err;