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CVE-2006-0905

20
FAUCET Score

CVE-2006-0905 describes a programming error in the fast_ipsec implementation of FreeBSD and NetBSD versions, specifically affecting FreeBSD 4.8-RELEASE through 6.1-STABLE and NetBSD 2 through 3. This flaw prevents proper Security Association sequence number updates, enabling remote attackers to bypass sequence number checks, capture IPSec packets, and execute replay attacks. With a CVSS score of 7.5, this vulnerability is considered highly severe due to its network-based attack vector, low attack complexity, and potential for partial confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
4.8CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:4.8:*:*:*:*:*:*:*
4.8CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:4.8:pre-release:*:*:*:*:*:*
4.8CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:4.8:release_p7:*:*:*:*:*:*
4.8CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:4.8:releng:*:*:*:*:*:*
4.9CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:4.9:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.80%
Probability of exploitation in next 30 days
EPSS Percentile
76.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0180 is in the 59th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

ftp.freebsd.org / pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:11.ipsec.asc
PatchVendor Advisory
ftp.netbsd.org / pub/NetBSD/security/advisories/NetBSD-SA2006-011.txt.asc
secunia.com / advisories/19366
PatchVendor Advisory
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/25398
osvdb.org / 24068
securityfocus.com / bid/17191
Patch