SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2005-0039

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…

MEDIUM 6.4EPSS 4.08%

Does this matter?

Lower severity and a low EPSS score (4.08%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 2.0
6.4 MEDIUMAV:N/AC:L/Au:N/C:P/I:P/A:N
EPSS
4.08% probability · 90th percentile
CISA KEV
Not listed
Affected
nissc/ipsec
Source
cve@mitre.org

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.