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Red Hat Bugzilla – Attachment 847934 Details for
Bug 1033990
CVE-2013-6393 libyaml: heap-based buffer overflow when parsing YAML tags
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[patch]
libyaml-node-id-hardening.patch
libyaml-node-id-hardening.patch (text/plain), 728 bytes, created by
Garth Mollett
on 2014-01-09 23:13:18 UTC
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Description:
libyaml-node-id-hardening.patch
Filename:
MIME Type:
Creator:
Garth Mollett
Created:
2014-01-09 23:13:18 UTC
Size:
728 bytes
patch
obsolete
># HG changeset patch ># User Florian Weimer <fweimer@redhat.com> ># Date 1389274355 -3600 ># Thu Jan 09 14:32:35 2014 +0100 ># Node ID 034d7a91581ac930e5958683f1a06f41e96d24a2 ># Parent a54d7af707f25dc298a7be60fd152001d2b3035b >yaml_stack_extend: guard against integer overflow > >diff --git a/src/api.c b/src/api.c >--- a/src/api.c >+++ b/src/api.c >@@ -117,7 +117,12 @@ > YAML_DECLARE(int) > yaml_stack_extend(void **start, void **top, void **end) > { >- void *new_start = yaml_realloc(*start, ((char *)*end - (char *)*start)*2); >+ void *new_start; >+ >+ if ((char *)*end - (char *)*start >= INT_MAX / 2) >+ return 0; >+ >+ new_start = yaml_realloc(*start, ((char *)*end - (char *)*start)*2); > > if (!new_start) return 0; >
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