File CVE-2016-10349.patch of Package libarchive.13055

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File CVE-2016-10349.patch of Package libarchive.13055

commit 88eb9e1d73fef46f04677c25b1697b8e25777ed3
Author: Joerg Sonnenberger <joerg@bec.de>
Date:   Thu Dec 1 19:56:43 2016 +0100

Reread the CAB header skipping the self-extracting binary code.
    
    Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15 as found
    by the "OSS-Fuzz" project.

Index: libarchive-3.1.2/libarchive/archive_read_support_format_cab.c
===================================================================
--- libarchive-3.1.2.orig/libarchive/archive_read_support_format_cab.c
+++ libarchive-3.1.2/libarchive/archive_read_support_format_cab.c
@@ -643,12 +643,13 @@ cab_read_header(struct archive_read *a)
 	cab = (struct cab *)(a->format->data);
 	if (cab->found_header == 0 &&
 	    p[0] == 'M' && p[1] == 'Z') {
-		/* This is an executable?  Must be self-extracting... 	*/
+		/* This is an executable?  Must be self-extracting... */
 		err = cab_skip_sfx(a);
 		if (err < ARCHIVE_WARN)
 			return (err);
 
-		if ((p = __archive_read_ahead(a, sizeof(*p), NULL)) == NULL)
+		/* Re-read header after processing the SFX. */
+		if ((p = __archive_read_ahead(a, 42, NULL)) == NULL)
 			return (truncated_error(a));
 	}

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File CVE-2016-10349.patch of Package libarchive.13055

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