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64 lines
2.4 KiB
Diff
64 lines
2.4 KiB
Diff
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Fix CVE-2017-10790:
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https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-10790
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Patch copied from upstream source repository:
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https://git.savannah.nongnu.org/cgit/libtasn1.git/commit/?id=d8d805e1f2e6799bb2dff4871a8598dc83088a39
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From d8d805e1f2e6799bb2dff4871a8598dc83088a39 Mon Sep 17 00:00:00 2001
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From: Nikos Mavrogiannopoulos <nmav@redhat.com>
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Date: Thu, 22 Jun 2017 16:31:37 +0200
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Subject: [PATCH] _asn1_check_identifier: safer access to values read
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Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>
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---
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lib/parser_aux.c | 17 ++++++++++++-----
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1 file changed, 12 insertions(+), 5 deletions(-)
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diff --git a/lib/parser_aux.c b/lib/parser_aux.c
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index 976ab38..786ea64 100644
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--- a/lib/parser_aux.c
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+++ b/lib/parser_aux.c
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@@ -955,7 +955,7 @@ _asn1_check_identifier (asn1_node node)
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if (p2 == NULL)
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{
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if (p->value)
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- _asn1_strcpy (_asn1_identifierMissing, p->value);
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+ _asn1_str_cpy (_asn1_identifierMissing, sizeof(_asn1_identifierMissing), (char*)p->value);
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else
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_asn1_strcpy (_asn1_identifierMissing, "(null)");
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return ASN1_IDENTIFIER_NOT_FOUND;
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@@ -968,9 +968,15 @@ _asn1_check_identifier (asn1_node node)
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if (p2 && (type_field (p2->type) == ASN1_ETYPE_DEFAULT))
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{
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_asn1_str_cpy (name2, sizeof (name2), node->name);
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- _asn1_str_cat (name2, sizeof (name2), ".");
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- _asn1_str_cat (name2, sizeof (name2), (char *) p2->value);
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- _asn1_strcpy (_asn1_identifierMissing, p2->value);
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+ if (p2->value)
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+ {
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+ _asn1_str_cat (name2, sizeof (name2), ".");
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+ _asn1_str_cat (name2, sizeof (name2), (char *) p2->value);
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+ _asn1_str_cpy (_asn1_identifierMissing, sizeof(_asn1_identifierMissing), (char*)p2->value);
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+ }
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+ else
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+ _asn1_strcpy (_asn1_identifierMissing, "(null)");
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+
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p2 = asn1_find_node (node, name2);
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if (!p2 || (type_field (p2->type) != ASN1_ETYPE_OBJECT_ID) ||
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!(p2->type & CONST_ASSIGN))
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@@ -990,7 +996,8 @@ _asn1_check_identifier (asn1_node node)
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_asn1_str_cpy (name2, sizeof (name2), node->name);
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_asn1_str_cat (name2, sizeof (name2), ".");
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_asn1_str_cat (name2, sizeof (name2), (char *) p2->value);
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- _asn1_strcpy (_asn1_identifierMissing, p2->value);
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+ _asn1_str_cpy (_asn1_identifierMissing, sizeof(_asn1_identifierMissing), (char*)p2->value);
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+
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p2 = asn1_find_node (node, name2);
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if (!p2 || (type_field (p2->type) != ASN1_ETYPE_OBJECT_ID)
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|| !(p2->type & CONST_ASSIGN))
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--
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2.13.3
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