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for -m 11600 = 7zip we need to remove special case, since the padding attack is now gone

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philsmd 2017-05-17 14:15:13 +02:00
parent afd97454f8
commit aa14b4ec9e
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GPG Key ID: 4F25D016D9D6A8AF
1 changed files with 1 additions and 20 deletions
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19
src/interface.c
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@ -11853,18 +11853,13 @@ int seven_zip_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_
seven_zip->aes_len = aes_len; seven_zip->aes_len = aes_len;
const u32 margin = data_len - unpack_size;
if (data_type != 0x80) if (data_type != 0x80)
{ {
if (data_type > 2) if (data_type > 2)
{
if (margin < 4) // we can't be sure about too many false positives
{ {
return (PARSER_SALT_VALUE); return (PARSER_SALT_VALUE);
} }
} }
}
// real salt // real salt
@ -14863,20 +14858,6 @@ void seven_zip_hook_func (hc_device_param_t *device_param, hashes_t *hashes, con
out_full[j + 2] = out[2]; out_full[j + 2] = out[2];
out_full[j + 3] = out[3]; out_full[j + 3] = out[3];
if (data_type > 2)
{
// This decompression is currently not supported
// this check implies also this case:
// if (data_type == 0x80) // truncated
// we can't do a full CRC check since data in this case is truncated
// could lead to a higher number of false positives in very rare cases
hook_item->hook_success = 1;
continue;
}
/* /*
* check the CRC32 "hash" * check the CRC32 "hash"
*/ */