云服务项目tomcat出现莫名的cookie攻击，有知道这是意思吗，有什么危险，应采取什么措施。

13-Apr-2021 00:55:28.195 INFO [http-nio-10580-exec-15] org.apache.coyote.http11.Http11Processor.service Error parsing HTTP request header
 Note: further occurrences of HTTP request parsing errors will be logged at DEBUG level.
	java.lang.IllegalArgumentException: Invalid character found in method name [0x030x000x00/*0xe00x000x000x000x000x00Cookie:]. HTTP method names must be tokens
		at org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:431)
		at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:503)
		at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
		at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:831)
		at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1634)
		at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
		at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
		at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
		at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
		at java.lang.Thread.run(Thread.java:745)
13-Apr-2021 20:04:34.060 INFO [http-nio-10580-exec-8] org.apache.tomcat.util.http.parser.Cookie.logInvalidHeader A cookie header was received [phtml,php3"; InitSiteID=106332; SiteType=1; IsDefaultLang=1; WUserID=1603099899557; Lang=cn; yz_site=isSite; G1gn_2132_saltkey=Cf3gqRXg; G1gn_2132_lastvisit=1618303818; G1gn_2132_sid=bR4IcR; G1gn_2132_lastact=1618308966%09home.php%09space; VyPM_2132_saltkey=xzOI1IM7; VyPM_2132_lastvisit=1618303909; VyPM_2132_sid=yb4gkg; VyPM_2132_lastact=1618307509%09forum.php%09viewthread; VyPM_2132_st_p=0%7C1618307509%7C60622386b1cbb3bc9781e3ed319ab74c; VyPM_2132_visitedfid=136; VyPM_2132_viewid=tid_1035210; SERVERID=_srv80-78_; PvKl_2132_saltkey=ACUXyqA0; PvKl_2132_lastvisit=1618304367; PvKl_2132_sid=BGcikG; PvKl_2132_lastact=1618307967%09forum.php%09viewthread; PvKl_2132_st_p=0%7C1618307967%7C1afe289e573bd7cd848667e71b658a58; PvKl_2132_visitedfid=3017; PvKl_2132_viewid=tid_227050; ABTEST=3|1618307979|v1; VIDEO_DEBUG=off; ASPSESSIONIDCSSSSTDB=NEEDFNPBJPLFMLGIOPACOBKE; 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That cookie will be ignored.
 Note: further occurrences of this error will be logged at DEBUG level.