[UNIX] Remote Heap Corruption Overflow vulnerability in WsMp3d (CHA)
From: SecuriTeam (support_at_securiteam.com)
Date: 05/21/03
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To: list@securiteam.com Date: 21 May 2003 18:59:31 +0200
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Remote Heap Corruption Overflow vulnerability in WsMp3d (CHA)
------------------------------------------------------------------------
SUMMARY
<http://wsmp3.sourceforge.net> WsMp3d is a "web server which also acts as
a ShoutCast-server". A remotely exploitable heap vulnerability allows
attackers to cause the program to execute arbitrary code.
DETAILS
Due to misallocation and incorrect utilization of resources, a heap
overflow vulnerability can be caused by a remote attacker, allowing him to
execute arbitrary code.
Patch:
--- req_descriptor.c Mon Dec 2 22:21:35 2002
+++ req_descriptor.patch.c Sat May 3 03:25:32 2003
@@ -201,11 +201,11 @@
if(PDEBUG) printf("Entro in parse_request\n");
for(i=0;i<BUFSIZE;i++) reqcpy[i]='\0';
- strncpy(reqcpy,req,strlen(req));
+ strncpy(reqcpy,req,(10-1));
ritorno->action=get_op(reqcpy);
for(i=0;i<BUFSIZE;i++) reqcpy[i]='\0';
- strncpy(reqcpy,req,strlen(req));
+ strncpy(reqcpy,req,(1024-1));
if(ritorno->action!=NULL)
{
if(!strcmp(ritorno->action,"CHA"))
ritorno->what=nomefile(reqcpy,1) ;
@@ -214,55 +214,55 @@
else ritorno->what=NULL;
for(i=0;i<BUFSIZE;i++) reqcpy[i]='\0';
- strncpy(reqcpy,req,strlen(req));
+ strncpy(reqcpy,req,(1024-1));
ritorno->host=gimme_line(reqcpy,"Host: ");
for(i=0;i<BUFSIZE;i++) reqcpy[i]='\0';
- strncpy(reqcpy,req,strlen(req));
+ strncpy(reqcpy,req,(1024-1));
ritorno->agent=gimme_line(reqcpy,"User-Agent: ");
for(i=0;i<BUFSIZE;i++) reqcpy[i]='\0';
- strncpy(reqcpy,req,strlen(req));
+ strncpy(reqcpy,req,(1024-1));
ritorno->accept=gimme_line(reqcpy,"Accept: ");
for(i=0;i<BUFSIZE;i++) reqcpy[i]='\0';
- strncpy(reqcpy,req,strlen(req));
+ strncpy(reqcpy,req,(1024-1));
ritorno->lang=gimme_line(reqcpy,"Accept-Language: ");
for(i=0;i<BUFSIZE;i++) reqcpy[i]='\0';
- strncpy(reqcpy,req,strlen(req));
+ strncpy(reqcpy,req,(1024-1));
ritorno->enc=gimme_line(reqcpy,"Accept-Encoding: ");
for(i=0;i<BUFSIZE;i++) reqcpy[i]='\0';
- strncpy(reqcpy,req,strlen(req));
+ strncpy(reqcpy,req,(1024-1));
ritorno->charset=gimme_line(reqcpy,"Accept-Charset: ");
for(i=0;i<BUFSIZE;i++) reqcpy[i]='\0';
- strncpy(reqcpy,req,strlen(req));
+ strncpy(reqcpy,req,(1024-1));
ritorno->keep=gimme_line(reqcpy,"Keep-Alive: ");
for(i=0;i<BUFSIZE;i++) reqcpy[i]='\0';
- strncpy(reqcpy,req,strlen(req));
+ strncpy(reqcpy,req,(1024-1));
ritorno->conn=gimme_line(reqcpy,"Connection: ");
for(i=0;i<BUFSIZE;i++) reqcpy[i]='\0';
- strncpy(reqcpy,req,strlen(req));
+ strncpy(reqcpy,req,(1024-1));
ritorno->referer=gimme_line(reqcpy,"Referer: ");
for(i=0;i<BUFSIZE;i++) reqcpy[i]='\0';
- strncpy(reqcpy,req,strlen(req));
+ strncpy(reqcpy,req,(1024-1));
ritorno->pragma=gimme_line(reqcpy,"Pragma: ");
for(i=0;i<BUFSIZE;i++) reqcpy[i]='\0';
- strncpy(reqcpy,req,strlen(req));
+ strncpy(reqcpy,req,(1024-1));
ritorno->contType=gimme_line(reqcpy,"Content-Type: ");
for(i=0;i<BUFSIZE;i++) reqcpy[i]='\0';
- strncpy(reqcpy,req,strlen(req));
+ strncpy(reqcpy,req,(1024-1));
ritorno->contLength=gimme_line(reqcpy,"Content-Length: ");
for(i=0;i<BUFSIZE;i++) reqcpy[i]='\0';
- strncpy(reqcpy,req,strlen(req));
+ strncpy(reqcpy,req,(1024-1));
ritorno->content=gimme_content(reqcpy);
for(i=0;i<BUFSIZE;i++) reqcpy[i]='\0';
return ritorno;
ADDITIONAL INFORMATION
The information has been provided by <mailto:xploit@hackermail.com>
dong-h0un U.
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