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Fix HTTP evasion

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- Happen when there is no CRLF at the end of HTTP
    - Fix by adding CRLF when packet is complete (in relation to content-length in header)
This commit is contained in:
jerome Grandvalet 2021-07-23 09:28:29 +02:00
parent 9383c926ad
commit 8cabecec40
8 changed files with 74 additions and 0 deletions
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11
testing/btest/Baseline/scripts.base.protocols.http.http-no-crlf/conn.log Normal file
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### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
#separator \x09
#set_separator ,
#empty_field (empty)
#unset_field -
#path conn
#open XXXX-XX-XX-XX-XX-XX
#fields ts uid id.orig_h id.orig_p id.resp_h id.resp_p proto service duration orig_bytes resp_bytes conn_state local_orig local_resp missed_bytes history orig_pkts orig_ip_bytes resp_pkts resp_ip_bytes tunnel_parents
#types time string addr port addr port enum string interval count count string bool bool count string count count count count set[string]
XXXXXXXXXX.XXXXXX CHhAvVGS1DHFjwGM9 10.1.6.206 49783 5.2.136.90 80 tcp http 109.987365 36349 1483945 SF - - 0 ShADadfF 406 52601 1113 1528477 -
#close XXXX-XX-XX-XX-XX-XX

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testing/btest/Baseline/scripts.base.protocols.http.http-no-crlf/http.log Normal file
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### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
#separator \x09
#set_separator ,
#empty_field (empty)
#unset_field -
#path http
#open XXXX-XX-XX-XX-XX-XX
#fields ts uid id.orig_h id.orig_p id.resp_h id.resp_p trans_depth method host uri referrer version user_agent origin request_body_len response_body_len status_code status_msg info_code info_msg tags username password proxied orig_fuids orig_filenames orig_mime_types resp_fuids resp_filenames resp_mime_types
#types time string addr port addr port count string string string string string string string count count count string count string set[enum] string string set[string] vector[string] vector[string] vector[string] vector[string] vector[string] vector[string]
XXXXXXXXXX.XXXXXX CHhAvVGS1DHFjwGM9 10.1.6.206 49783 5.2.136.90 80 1 POST 5.2.136.90 /7u0e9j2avwlvnuynyo/szcm27k/fzb067wy/ 5.2.136.90/7u0e9j2avwlvnuynyo/szcm27k/fzb067wy/ 1.1 Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E) - 6086 306596 200 OK - - (empty) - - - FZLrmN1Yfib3JXC6T6 iVOWebWBCLKvFqxScD - FM9Psl4fUa9gBZCQQh - -
XXXXXXXXXX.XXXXXX CHhAvVGS1DHFjwGM9 10.1.6.206 49783 5.2.136.90 80 2 POST 5.2.136.90 /ko5ezxmguvv/p8d4003oiu/utkdae7r/74uzr8n74r/ 5.2.136.90/ko5ezxmguvv/p8d4003oiu/utkdae7r/74uzr8n74r/ 1.1 Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E) - 7558 411556 200 OK - - (empty) - - - FHPOuh2TVJgp3pJq3j NyhdNgYAMkJTEH - FOKNaz1g8KecRiTWhi - -
XXXXXXXXXX.XXXXXX CHhAvVGS1DHFjwGM9 10.1.6.206 49783 5.2.136.90 80 3 POST 5.2.136.90 /vwst360x8syxks325x/26dtqu31wzhmwqq/8p9iu8zbragj/ 5.2.136.90/vwst360x8syxks325x/26dtqu31wzhmwqq/8p9iu8zbragj/ 1.1 Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E) - 8214 473908 200 OK - - (empty) - - - FYaldg1JYa11cOBei YJOjLXCTqhWyWCU - FoNDxZ3lGCLGrBdTJh - -
XXXXXXXXXX.XXXXXX CHhAvVGS1DHFjwGM9 10.1.6.206 49783 5.2.136.90 80 4 POST 5.2.136.90 /mro86v6nvs42/ 5.2.136.90/mro86v6nvs42/ 1.1 Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E) - 6278 287012 200 OK - - (empty) - - - F8vuNh3ptzshBJwPw5 qzLwsgh - FsVY0sBNS0RyFWK55 - -
XXXXXXXXXX.XXXXXX CHhAvVGS1DHFjwGM9 10.1.6.206 49783 5.2.136.90 80 5 POST 5.2.136.90 /raet/u6tpsbdmo5g7crj4f/8l720ln/lwrl5fe38/1yje7g5qc/ 5.2.136.90/raet/u6tpsbdmo5g7crj4f/8l720ln/lwrl5fe38/1yje7g5qc/ 1.1 Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E) - 6230 1172 200 OK - - (empty) - - - FwDnoS3IYtb3kfjBhh HNmSIHcQqiuDjyl - FDuXok3U88iL5gT5Ij - -
#close XXXX-XX-XX-XX-XX-XX

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testing/btest/Traces/http/no_crlf.pcap Normal file
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testing/btest/scripts/base/protocols/http/http-no-crlf.zeek Normal file
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# This tests that the HTTP analyzer handles HTTP with no CRLF at end correctly.
# @TEST-EXEC: zeek -b -r $TRACES/http/no_crlf.pcap %INPUT
# @TEST-EXEC: btest-diff conn.log
# @TEST-EXEC: btest-diff http.log
# @TEST-EXEC: test ! -f weird.log
@load base/protocols/conn
@load base/protocols/http
@load base/frameworks/dpd