Vulnerability CVE-2005-0039
Published: 2005-05-10   Modified: 2012-02-12

Description:
Certain configurations of IPsec, when using Encapsulating Security Payload (ESP) in tunnel mode, integrity protection at a higher layer, or Authentication Header (AH), allow remote attackers to decrypt IPSec communications by modifying the outer packet in ways that cause plaintext data from the inner packet to be returned in ICMP messages, as demonstrated using bit-flipping attacks and (1) Destination Address Rewriting, (2) a modified header length that causes portions of the packet to be interpreted as IP Options, or (3) a modified protocol field and source address.

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.4/10
4.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
None
Affected software
Nissc -> Ipsec 

 References:
http://www.kb.cert.org/vuls/id/302220
http://www.vupen.com/english/advisories/2005/2806
http://www.vupen.com/english/advisories/2005/0507
http://www.securityfocus.com/archive/1/407774
http://www.niscc.gov.uk/niscc/docs/al-20050509-00386.html?lang=en
http://www.securityfocus.com/bid/13562
http://www.securityfocus.com/archive/1/407774
http://securitytracker.com/id?1015320
http://secunia.com/advisories/17938
http://marc.theaimsgroup.com/?l=bugtraq&m=111566201610350&w=2
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