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Check blocksize. CERT-FI 829767

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id:000005,sig:06,src:000000,op:havoc,rep:16
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John Reiser
2015-05-09 06:56:32 -07:00
parent acede72e9b
commit 7ad77ff540
1 changed files with 2 additions and 1 deletions
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src/p_mach.cpp
+2 -1
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@@ -1285,7 +1285,8 @@ void PackMachBase<T>::unpack(OutputFile *fo)
fi->readx(&hbuf, sizeof(hbuf)); fi->readx(&hbuf, sizeof(hbuf));
unsigned orig_file_size = get_te32(&hbuf.p_filesize); unsigned orig_file_size = get_te32(&hbuf.p_filesize);
blocksize = get_te32(&hbuf.p_blocksize); blocksize = get_te32(&hbuf.p_blocksize);
if (file_size > (off_t)orig_file_size || blocksize > orig_file_size) if (file_size > (off_t)orig_file_size || blocksize > orig_file_size
|| blocksize > 0x01000000)
throwCantUnpack("file header corrupted"); throwCantUnpack("file header corrupted");
ibuf.alloc(blocksize + OVERHEAD); ibuf.alloc(blocksize + OVERHEAD);