VULNERABILITY INTELLIGENCE
CVE-2005-0039
CVSS score6.4 MEDIUM
EPSS probability4.08%
CISA KEVNot currently listed
Published2005-05-10
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:P/I:P/A:N
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.