33 lines
1.3 KiB
Diff
33 lines
1.3 KiB
Diff
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Fix CVE-2017-5975:
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https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5975
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Patch copied from Debian.
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Index: zziplib-0.13.62/zzip/memdisk.c
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===================================================================
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--- zziplib-0.13.62.orig/zzip/memdisk.c
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+++ zziplib-0.13.62/zzip/memdisk.c
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@@ -173,6 +173,8 @@ zzip_mem_entry_new(ZZIP_DISK * disk, ZZI
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return 0; /* errno=ENOMEM; */
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___ struct zzip_file_header *header =
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zzip_disk_entry_to_file_header(disk, entry);
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+ if (!header)
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+ { free(item); return 0; }
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/* there is a number of duplicated information in the file header
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* or the disk entry block. Theoretically some part may be missing
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* that exists in the other, ... but we will prefer the disk entry.
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Index: zziplib-0.13.62/zzip/mmapped.c
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===================================================================
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--- zziplib-0.13.62.orig/zzip/mmapped.c
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+++ zziplib-0.13.62/zzip/mmapped.c
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@@ -289,6 +289,8 @@ zzip_disk_entry_to_file_header(ZZIP_DISK
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(disk->buffer + zzip_disk_entry_fileoffset(entry));
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if (disk->buffer > file_header || file_header >= disk->endbuf)
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return 0;
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+ if (ZZIP_GET32(file_header) != ZZIP_FILE_HEADER_MAGIC)
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+ return 0;
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return (struct zzip_file_header *) file_header;
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}
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