43 // What are funny IPs:  
 44 // The adjective is because of the curl blog that explains the history and the problem of liberal  
 45 // parsing of IP addresses and the consequences and security risks caused the lack of normalization,
 46 // mainly due to the use of different notations to abuse parsers misalignment to bypass filters.
 47 // xref: https://daniel.haxx.se/blog/2021/04/19/curl-those-funny-ipv4-addresses/   
 48 //     
 49 // Since golang 1.17, IPv4 addresses with leading zeros are rejected by the standard library.
 50 // xref: https://github.com/golang/go/issues/30999
 51 //     
 52 // Because this change on the parsers can cause that previous valid data become invalid, Kubernetes
 53 // forked the old parsers allowing leading zeros on IPv4 address to not break the compatibility.
 54 //     
 55 // Kubernetes interprets leading zeros on IPv4 addresses as decimal, users must not rely on parser
 56 // alignment to not being impacted by the associated security advisory: CVE-2021-29923 golang
 57 // standard library "net" - Improper Input Validation of octal literals in golang 1.16.2 and below
 58 // standard library "net" results in indeterminate SSRF & RFI vulnerabilities. xref:
 59 // https://nvd.nist.gov/vuln/detail/CVE-2021-29923                                                                                                     

|socket_util|ERR|172.30.0.011:7180: bad IP address "172.30.0.011" 
...
2022-08-23T14:14:21.968Z|01839|ovn_util|WARN|bad ip address or port for load balancer key 172.30.0.011:7180

E0823 14:14:34.135115    3284 gateway_shared_intf.go:600] Failed to delete conntrack entry for service e2e-funny-ips-8626/funny-ip: failed to delete conntrack entry for service e2e-funny-ips-8626/funny-ip with svcVIP 172.30.0.011, svcPort 7180, protocol TCP: value "<nil>" passed to DeleteConntrack is not an IP address