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Fix CVE-2017-5981:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5981
Patch copied from Debian.
Index: zziplib-0.13.62/zzip/fseeko.c
===================================================================
--- zziplib-0.13.62.orig/zzip/fseeko.c
+++ zziplib-0.13.62/zzip/fseeko.c
@@ -311,7 +311,8 @@ zzip_entry_findfirst(FILE * disk)
} else
continue;
- assert(0 <= root && root < mapsize);
+ if (root < 0 || root >= mapsize)
+ goto error;
if (fseeko(disk, root, SEEK_SET) == -1)
goto error;
if (fread(disk_(entry), 1, sizeof(*disk_(entry)), disk)
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