Package: release.debian.org User: release.debian....@packages.debian.org Usertags: pu Tags: stretch Severity: normal
This is an update to Stretch with a patch from git which fixes CVE-2012-6706. The final clamav release is planned for the end of July, this is the only commit in the libclamunrar part so far. Sebastian
diff -Nru libclamunrar-0.99/debian/changelog libclamunrar-0.99/debian/changelog --- libclamunrar-0.99/debian/changelog 2016-12-17 22:00:03.000000000 +0100 +++ libclamunrar-0.99/debian/changelog 2017-07-05 08:30:54.000000000 +0200 @@ -1,3 +1,10 @@ +libclamunrar (0.99-3+deb9u1) stable; urgency=medium + + * Cherry pick fix for arbitrary memory write. CVE-2012-6706 + (Closes: #867223). + + -- Sebastian Andrzej Siewior <sebast...@breakpoint.cc> Wed, 05 Jul 2017 08:30:54 +0200 + libclamunrar (0.99-3) unstable; urgency=medium * Add a fixup for bb11601. diff -Nru libclamunrar-0.99/debian/.git-dpm libclamunrar-0.99/debian/.git-dpm --- libclamunrar-0.99/debian/.git-dpm 2016-12-16 21:56:07.000000000 +0100 +++ libclamunrar-0.99/debian/.git-dpm 2017-07-05 08:27:35.000000000 +0200 @@ -1,6 +1,6 @@ # see git-dpm(1) from git-dpm package -0b977ab3aaecd1e2e434474f30288eea3c029fe0 -0b977ab3aaecd1e2e434474f30288eea3c029fe0 +890a88f7d593eb6f3a13200103c6e49313eca3f1 +890a88f7d593eb6f3a13200103c6e49313eca3f1 87f93791ab6959fd522bdf0b1211ff0480cff4c7 87f93791ab6959fd522bdf0b1211ff0480cff4c7 libclamunrar_0.99.orig.tar.xz diff -Nru libclamunrar-0.99/debian/patches/series libclamunrar-0.99/debian/patches/series --- libclamunrar-0.99/debian/patches/series 2016-12-16 21:56:07.000000000 +0100 +++ libclamunrar-0.99/debian/patches/series 2017-07-05 08:27:35.000000000 +0200 @@ -3,3 +3,4 @@ bb11601.patch drop_openssl_check.patch bb11601_pt2.patch +unrar-adding-proposed-changes-to-fix-RAR-VMSF_DELTA-.patch diff -Nru libclamunrar-0.99/debian/patches/unrar-adding-proposed-changes-to-fix-RAR-VMSF_DELTA-.patch libclamunrar-0.99/debian/patches/unrar-adding-proposed-changes-to-fix-RAR-VMSF_DELTA-.patch --- libclamunrar-0.99/debian/patches/unrar-adding-proposed-changes-to-fix-RAR-VMSF_DELTA-.patch 1970-01-01 01:00:00.000000000 +0100 +++ libclamunrar-0.99/debian/patches/unrar-adding-proposed-changes-to-fix-RAR-VMSF_DELTA-.patch 2017-07-05 08:27:35.000000000 +0200 @@ -0,0 +1,173 @@ +From 890a88f7d593eb6f3a13200103c6e49313eca3f1 Mon Sep 17 00:00:00 2001 +From: Mickey Sola <ms...@sourcefire.com> +Date: Thu, 29 Jun 2017 14:02:03 -0400 +Subject: unrar - adding proposed changes to fix RAR VMSF_DELTA Filter + Signedness error + +CVE: CVE-2012-6706: arbitrary memory write +BTS: #867223 +Patch-Name: unrar-adding-proposed-changes-to-fix-RAR-VMSF_DELTA-.patch +--- + libclamunrar/unrarvm.c | 55 ++++++++++++++++++++++++++------------------------ + 1 file changed, 29 insertions(+), 26 deletions(-) + +diff --git a/libclamunrar/unrarvm.c b/libclamunrar/unrarvm.c +index 102fe2ebf044..b21e242fa72b 100644 +--- a/libclamunrar/unrarvm.c ++++ b/libclamunrar/unrarvm.c +@@ -213,9 +213,9 @@ void rarvm_addbits(rarvm_input_t *rarvm_input, int bits) + + unsigned int rarvm_getbits(rarvm_input_t *rarvm_input) + { +- unsigned int bit_field = 0; ++ unsigned int bit_field = 0; + +- if (rarvm_input->in_addr < rarvm_input->buf_size) { ++ if (rarvm_input->in_addr < rarvm_input->buf_size) { + bit_field = (unsigned int) rarvm_input->in_buf[rarvm_input->in_addr] << 16; + if (rarvm_input->in_addr+1 < rarvm_input->buf_size) { + bit_field |= (unsigned int) rarvm_input->in_buf[rarvm_input->in_addr+1] << 8; +@@ -314,10 +314,10 @@ static unsigned int *rarvm_get_operand(rarvm_data_t *rarvm_data, + } + } + +-static unsigned int filter_itanium_getbits(unsigned char *data, int bit_pos, int bit_count) ++static unsigned int filter_itanium_getbits(unsigned char *data, unsigned int bit_pos, unsigned int bit_count) + { +- int in_addr=bit_pos/8; +- int in_bit=bit_pos&7; ++ unsigned int in_addr=bit_pos/8; ++ unsigned int in_bit=bit_pos&7; + unsigned int bit_field=(unsigned int)data[in_addr++]; + bit_field|=(unsigned int)data[in_addr++] << 8; + bit_field|=(unsigned int)data[in_addr++] << 16; +@@ -326,10 +326,10 @@ static unsigned int filter_itanium_getbits(unsigned char *data, int bit_pos, int + return(bit_field & (0xffffffff>>(32-bit_count))); + } + +-static void filter_itanium_setbits(unsigned char *data, unsigned int bit_field, int bit_pos, int bit_count) ++static void filter_itanium_setbits(unsigned char *data, unsigned int bit_field, unsigned int bit_pos, unsigned int bit_count) + { +- int i, in_addr=bit_pos/8; +- int in_bit=bit_pos&7; ++ unsigned int i, in_addr=bit_pos/8; ++ unsigned int in_bit=bit_pos&7; + unsigned int and_mask=0xffffffff>>(32-bit_count); + and_mask=~(and_mask<<in_bit); + +@@ -346,11 +346,12 @@ static void filter_itanium_setbits(unsigned char *data, unsigned int bit_field, + static void execute_standard_filter(rarvm_data_t *rarvm_data, rarvm_standard_filters_t filter_type) + { + unsigned char *data, cmp_byte2, cur_byte, *src_data, *dest_data; +- int i, j, data_size, channels, src_pos, dest_pos, border, width, PosR; +- int op_type, cur_channel, byte_count, start_pos, pa, pb, pc; ++ unsigned int i, j, data_size, channels, src_pos, dest_pos, border, width, PosR; ++ unsigned int op_type, cur_channel, byte_count, start_pos; ++ int pa, pb, pc; + unsigned int file_offset, cur_pos, predicted; +- int32_t offset, addr; +- const int file_size=0x1000000; ++ uint32_t offset, addr; ++ const unsigned int file_size=0x1000000; + + switch(filter_type) { + case VMSF_E8: +@@ -359,7 +360,7 @@ static void execute_standard_filter(rarvm_data_t *rarvm_data, rarvm_standard_fil + data_size = rarvm_data->R[4]; + file_offset = rarvm_data->R[6]; + +- if (((unsigned int)data_size >= VM_GLOBALMEMADDR) || (data_size < 4)) { ++ if ((data_size > VM_GLOBALMEMADDR) || (data_size < 4)) { + break; + } + +@@ -370,12 +371,14 @@ static void execute_standard_filter(rarvm_data_t *rarvm_data, rarvm_standard_fil + if (cur_byte==0xe8 || cur_byte==cmp_byte2) { + offset = cur_pos+file_offset; + addr = GET_VALUE(FALSE, data); +- if (addr < 0) { +- if (addr+offset >=0 ) { ++ // We check 0x80000000 bit instead of '< 0' comparison ++ // not assuming int32 presence or uint size and endianness. ++ if ((addr & 0x80000000)!=0) { // addr<0 ++ if (((addr+offset) & 0x80000000)==0) { // addr+offset>=0 + SET_VALUE(FALSE, data, addr+file_size); + } + } else { +- if (addr<file_size) { ++ if (((addr-file_size) & 0x80000000)!=0) { // addr<file_size + SET_VALUE(FALSE, data, addr-offset); + } + } +@@ -389,7 +392,7 @@ static void execute_standard_filter(rarvm_data_t *rarvm_data, rarvm_standard_fil + data_size = rarvm_data->R[4]; + file_offset = rarvm_data->R[6]; + +- if (((unsigned int)data_size >= VM_GLOBALMEMADDR) || (data_size < 21)) { ++ if ((data_size > VM_GLOBALMEMADDR) || (data_size < 21)) { + break; + } + +@@ -432,7 +435,7 @@ static void execute_standard_filter(rarvm_data_t *rarvm_data, rarvm_standard_fil + border = data_size*2; + + SET_VALUE(FALSE, &rarvm_data->mem[VM_GLOBALMEMADDR+0x20], data_size); +- if ((unsigned int)data_size >= VM_GLOBALMEMADDR/2) { ++ if (data_size > VM_GLOBALMEMADDR/2 || channels > 1024 || channels == 0) { + break; + } + for (cur_channel=0 ; cur_channel < channels ; cur_channel++) { +@@ -443,7 +446,7 @@ static void execute_standard_filter(rarvm_data_t *rarvm_data, rarvm_standard_fil + } + break; + case VMSF_RGB: { +- const int channels=3; ++ const unsigned int channels=3; + data_size = rarvm_data->R[4]; + width = rarvm_data->R[0] - 3; + PosR = rarvm_data->R[1]; +@@ -451,15 +454,14 @@ static void execute_standard_filter(rarvm_data_t *rarvm_data, rarvm_standard_fil + dest_data = src_data + data_size; + + SET_VALUE(FALSE, &rarvm_data->mem[VM_GLOBALMEMADDR+0x20], data_size); +- if ((unsigned int)data_size >= VM_GLOBALMEMADDR/2) { ++ if (data_size > VM_GLOBALMEMADDR/2 || data_size < 3 || width > data_size || PosR > 2) { + break; + } + for (cur_channel=0 ; cur_channel < channels; cur_channel++) { + unsigned int prev_byte = 0; + for (i=cur_channel ; i<data_size ; i+=channels) { +- int upper_pos=i-width; +- if (upper_pos >= 3) { +- unsigned char *upper_data = dest_data+upper_pos; ++ if (i >= width+3) { ++ unsigned char *upper_data = dest_data+i-width; + unsigned int upper_byte = *upper_data; + unsigned int upper_left_byte = *(upper_data-3); + predicted = prev_byte+upper_byte-upper_left_byte; +@@ -489,13 +491,14 @@ static void execute_standard_filter(rarvm_data_t *rarvm_data, rarvm_standard_fil + break; + } + case VMSF_AUDIO: { +- int channels=rarvm_data->R[0]; ++ unsigned int channels=rarvm_data->R[0]; + data_size = rarvm_data->R[4]; + src_data = rarvm_data->mem; + dest_data = src_data + data_size; + + SET_VALUE(FALSE, &rarvm_data->mem[VM_GLOBALMEMADDR+0x20], data_size); +- if ((unsigned int)data_size >= VM_GLOBALMEMADDR/2) { ++ // In fact, audio channels never exceed 4. ++ if (data_size > VM_GLOBALMEMADDR/2 || channels > 128 || channels == 0) { + break; + } + for (cur_channel=0 ; cur_channel < channels ; cur_channel++) { +@@ -556,7 +559,7 @@ static void execute_standard_filter(rarvm_data_t *rarvm_data, rarvm_standard_fil + data_size = rarvm_data->R[4]; + src_pos = 0; + dest_pos = data_size; +- if ((unsigned int)data_size >= VM_GLOBALMEMADDR/2) { ++ if (data_size > VM_GLOBALMEMADDR/2) { + break; + } + while (src_pos < data_size) {