31 lines
860 B
Diff
31 lines
860 B
Diff
From 65f83b8bf15a128524ef5fe26e1f1e219ee9b872 Mon Sep 17 00:00:00 2001
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From: Alexey Tikhonov <atikhono@redhat.com>
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Date: Fri, 1 Sep 2023 20:00:12 +0200
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Subject: [PATCH] avoid read-heap-buffer-overflow (#332)
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Fix invalid read in ares_parse_soa_reply.c found during fuzzing
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Fixes Bug: #333
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Fix By: lutianxiong (@ltx2018)
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---
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ares_parse_soa_reply.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/ares_parse_soa_reply.c b/ares_parse_soa_reply.c
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index 35af0a7..5924bbc 100644
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--- a/ares_parse_soa_reply.c
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+++ b/ares_parse_soa_reply.c
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@@ -65,6 +65,9 @@ ares_parse_soa_reply(const unsigned char *abuf, int alen,
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status = ares__expand_name_for_response(aptr, abuf, alen, &qname, &len);
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if (status != ARES_SUCCESS)
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goto failed_stat;
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+
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+ if (alen <= len + HFIXEDSZ + 1)
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+ goto failed;
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aptr += len;
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/* skip qtype & qclass */
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--
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2.38.1
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