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tcpdump
tcpdump-CVE-2019-1010220.patch
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File tcpdump-CVE-2019-1010220.patch of Package tcpdump
From 511915bef7e4de2f31b8d9f581b4a44b0cfbcf53 Mon Sep 17 00:00:00 2001 From: Guy Harris <guy@alum.mit.edu> Date: Sat, 1 Jun 2019 14:42:09 -0700 Subject: [PATCH] If decode_prefix6() returns a negative number, don't print buf. If it returns a negative number, it hasn't necessarily filled in buf, so just return immediately; this is similar to the IPv4 code path, wherein we just return a negative number, and print nothing, on an error. This should fix GitHub issue #763. --- print-hncp.c | 2 ++ 1 file changed, 2 insertions(+) Index: tcpdump-4.9.2/print-hncp.c =================================================================== --- tcpdump-4.9.2.orig/print-hncp.c +++ tcpdump-4.9.2/print-hncp.c @@ -231,6 +231,8 @@ print_prefix(netdissect_options *ndo, co plenbytes += 1 + IPV4_MAPPED_HEADING_LEN; } else { plenbytes = decode_prefix6(ndo, prefix, max_length, buf, sizeof(buf)); + if (plenbytes < 0) + return plenbytes; } ND_PRINT((ndo, "%s", buf));
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