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What is this OpenSSL heartbleed vulnerability?

heartbeat information struct is defined: struct hb { int type; int length; unsigned char *data; }; Type indicates the heartbeat type and length indicates the data size. The content structure of the data field is as follows: The Type field occupies one byte, the payload field occupies two bytes, and the rest is the specific content of payload

Msf-shellcode Generation and use

1Use EnvironmentKali 2.0Msfvenom2Msfvenomparameter DescriptionMsfvenom–h View HelpDescription : Options:-P,--payload attack load ) to be used . If you need to use a custom payload, use the #039;- #039; or stdin specify-L,--list [Module_type] lists all available resources for the specified module . module types include : Payloads, encoders, Nops, all-N,--nopsled Pre-Specifies a NOP sliding leng

Step-by-step implementation of iOS application push function

Didregisterforremotenotificationswithdevicetoken: (NSData *) DeviceToken { nsstring *token = [NSString stringwithformat:@ "%@", Devicetoken]; NSLog (@ "%@", token); } -(void) Application: (UIApplication *) app Didfailtoregisterforremotenotificationswitherror: (Nserror *) Error { NSLog (@ "%@", error); } After the application gets to the Devicetoken, the Provider,provider can be used to push the message to the device using this devicetoken. 5.

WebSocket Series: A Brief introduction

connection as failed. If the server response conforms to the above description, then the WebSocket connection is established and the status of the connection becomes "open state".2.5 Data Frames The WebSocket protocol transmits data through serialized data frames. Fields such as opcode, payload length, payload data are defined in the packet protocol. It requires that the data frames that the client transm

PHP Apple Push Implementation (APNS)

: gateway.push.apple.com, Port 2195 (using official certificate)Test address: gateway.sandbox.push.apple.com, Port 2195 (using test certificate)Received token from the device, which I filled in manually. $deviceToken = "015c5a2377ac146830f8ed09059b82bb91ed7190ebf74b633809bc2245da95ee";//Construct message body $body = Array ("APS" = Array ("alert" = "test test test", "badge" = 1, "sound" = ' received5.caf ')); $ctx = Stream_context_create (); STREAM_ Context_set_option ($ctx, "SSL", "Local_cert",

Send a picture file using WebSocket

Websocket is a data transfer control in the HTML5 .Support is now available in the mainstream browser.About WebSocket The relevant agreement can be found on the Internet, on how to establish a connection and other operations you can query the agreement obtained, this article mainly discusses how to carry out data transmission.The client uses the Chrome Browser to develop the websocket protocol on the server side using PHP .Websocket protocol A frame 's standard format: 0 1 2 3 0 1 2 3 4 5 6 7 8

SQL Injection via DNS

forge arbitrary records. Although it is a cool-killing tool for this level, at least I don't need to go to the registration page every time to change a record, and I can use a tool called dnsxss I wrote to quickly achieve it: Https://github.com/iagox86/nbtool $ sudo ./dnsxss --payload="Hello yes this is test"Listening for requests on 0.0.0.0:53Will response to queries with: Hello/yes/this/is/test $ dig -t txt test123.skullseclabs.org[...];; ANSWER SE

Capwap study notes--initial knowledge of Capwap (IV.)

playback of real-time video.So how does it differ from the traditional UDP protocol?The traditional UDP protocol is a complete verification of its payload (Payload), if some of the bits (even if only one) has changed, then the entire packet can be discarded, in some cases, the cost of losing this package is very large, especially when the package is relatively large.In the Udp-lite protocol, it is necessar

Packet Capture analysis

-ian=1832-1= (465-54) + (1474-54) indicates that C has received 1831 bytes from S.Next, C receives the remaining 719 bytes of the HTML file, and the message (PACKET9) is as follows.9 220.181.6.175:80→192.168.89.125:5672 HTTP 773http/1.1 OKAt this point, C received S sent over all the HTTP response message , that is, Baidu home HTML content (text/html).the ACK for PACKET6, PACKET7, and Packet9 are all 364because these three segment are TCP responses to Packet4 . S will Baidu homepage HTML file

Send a picture file using WebSocket

Websocket is a transport data control in the HTML5 .Support is now available in the mainstream browser.The relevant agreement on WebSocket can be found on the Internet, on how to establish a connection and other operations can be queried to obtain the agreement. This paper mainly discusses how to transfer data.The client uses the Chrome Browser to develop the websocket protocol on the server side using PHP .Websocket protocol A frame 's standard format: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6

Usage of Msfvenom in metasploit)

Options:-P, -- payload [payload] Payload to use. Specify a '-' or stdin to use M payloads-L, -- list [module_type] List a module type example: payloads, encoders, nops, all-N, -- nopsled [length] Prepend a nopsled of [length] size on to the payload-F, -- format [format] Format to output results in: raw, ruby, rb, perl,

Metasploit Command Daquan

attacks and other modules in the Metasploit framework.InfoDisplays information about a specific penetration attack or module.Use nameLoad a penetration attack or module.LhostYou can have the IP address of the destination host connected locally, usually when the target host is not in the same LAN, it needs to be a public IP address, especially for the rebound shell use.RHOSTRemote host or target host.Set functionSet specific configuration parameters (EG: Set local or remote host parameters).SETG

Remember tools semi-finished Products

__init__ (self): pass @staticmeth OD def register (UID): If UID is none:return False url = "Http://localhost:9999/register" response = Reque Sts.post (URL, data={"UID": uid}) if Response.status_code = Response.json () [' code '] = = 1000:r Eturn True return False class Memohelper (object): "" Client Memo Tool Class "" Def __init__ (self): Self.url = "http://localhost:9999/{}" def post (self, UID, memoid, Memo): PostURL = Self.url.format ("Add")

Study, research and implementation of WebSocket protocol

the OnOpen event. Sec-websocket-protocol Represents the optional sub-protocol provided by the client request, and the server-side selected supported sub-protocol, which is used by the "Origin" server to differentiate between unauthorized WebSocket browsers sec-websocket-version:13 The client carries in the handshake request, such a version ID, indicating that this is an upgrade version, now the browser is the use of this version. http/1.1 101 Switching protocols101 Status codes returned by the

Sqlmap-tamper Writing Summary

Tags: summary python xrange = = map com logs false Guide packagePurpose: Modify tamper scripts in Sqlmap to bypass code filtering and escaping specific parameters Environment: Win10, phpstudy2016, Sqli-labs-master platform Tools: Sqlmap, Burpsuite Address: http://127.0.0.1/sqli-labs-master/Less-27/?id=1 This page filters for select and spaces, custom scripts selec2select.py and space2%0a.py The contents of the selec2select.py script are as follows: #!/usr/bin/env python #定义解析器 From Lib.core.enum

The compilation, installation and function introduction of the C + + client library Librdkafka under Linux Kafka

calling Rd_kafka_producer to set one or more rd_kafka_topic_t objects, you are ready to receive messages and assemble and send to broker.The Rd_kafka_produce () function accepts the following parameters:RKT: Topic to be produced, previously generated by Rd_kafka_topic_new ()Partition: Production of partition. If set to Rd_kafka_partition_ua (unassigned), a certain PARTITION is selected according to the Builtin Partitioner. Kafka will call back Partitioner for a balanced selection, Partitioner m

Step-by-step implementation of the iOS app push feature

didfinishlaunchingwithoptions: (Nsdictionary *) launchOptions { [[UIApplication Sharedapplication] registerforremotenotificationtypes: (Uiremotenotificationtypealert | Uiremotenotificationtypesound | Uiremotenotificationtypebadge)]; Do something //... }Add the following method in Appdelegate to get the Devicetoken:-(void) Application: (UIApplication *) app Didregisterforremotenotificationswithdevicetoken: (NSData *) DeviceToken { nsstring *token = [NSString stringwithformat

Learning web security from scratch (2)

Learning web security from scratch (2) The previous article explains some basic xss knowledge. This article continues to study. I mentioned some theoretical things in the previous article, and I soon forgot about it. After a brief review, we will talk about the xss classification: stored XSS, reflected XSS, and dom xss. I talked about a few simple payloads, which are just theoretical things. I will not continue to look at the theory in this article. I will first try to use

Analysis of pwn entry series exercises (2)

", shellcode_address_at_stack)11 12 payload = "\x90"*2413 payload += p64(shellcode_address_at_stack)14 payload += shellcode15 io.sendline(payload)16 io.interactive() Question 2-bsides San Francisco CTF 2017-b_64_ B _tuff View the file format and protection. If a 32-bit ELF file is found, nx protection is enabled, t

WEBRTC Audio-related Neteq (ii)

voice packets (defined in advance). The contents of the deposit are timestamp/payloadlocation (payload address of the package, point to payload)/seqnumber/payloadtype/payloadlengthbytes/rcuplcntr/ Waitingtime/payload, etc. (see the Red box inside the section). Storage is not the timestamp/payload of each package and s

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