Mercurial > dropbear
annotate fuzzer-preauth.c @ 1715:3974f087d9c0
Disallow leading lines before the ident for server (#102)
Per RFC4253 4.2 clients must be able to process other lines of data
before the version string, server behavior is not defined neither
with MUST/SHOULD nor with MAY.
If server process up to 50 lines too - it may cause too long hanging
session with invalid/evil client that consume host resources and
potentially may lead to DDoS on poor embedded boxes.
Let's require first line from client to be version string and fail
early if it's not - matches both RFC and real OpenSSH behavior.
author | Vladislav Grishenko <themiron@users.noreply.github.com> |
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date | Mon, 15 Jun 2020 18:22:18 +0500 |
parents | a90fdd2d2ed8 |
children |
rev | line source |
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1348 | 1 #include "fuzz.h" |
2 | |
3 int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { | |
1456
a90fdd2d2ed8
add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents:
1386
diff
changeset
|
4 return fuzz_run_preauth(Data, Size, 0); |
a90fdd2d2ed8
add fuzzer-preauth_nomaths
Matt Johnston <matt@ucc.asn.au>
parents:
1386
diff
changeset
|
5 } |
1377
d4cc85e6c569
rearrange, all fuzzers now call fuzzer_set_input()
Matt Johnston <matt@ucc.asn.au>
parents:
1364
diff
changeset
|
6 |