A "programming error" in fast_ipsec in FreeBSD 4.8-RELEASE through 6.1-STABLE and NetBSD 2 through 3 does not properly update the sequence number associated with a Security Association, which allows packets to pass sequence number checks and allows remote attackers to capture IPSec packets and conduct replay attacks
Published Mar 23, 2006
7.5
HIGHCVSS 2.0
EPSS 1.85%
Description
A "programming error" in fast_ipsec in FreeBSD 4.8-RELEASE through 6.1-STABLE and NetBSD 2 through 3 does not properly update the sequence number associated with a Security Association, which allows packets to pass sequence number checks and allows remote attackers to capture IPSec packets and conduct replay attacks.
Affected products
No data.
- 4.8
- 4.8
- 4.8
- 4.8
- 4.9
- 4.9
- 4.9
- 4.10
- 4.10
- 4.10
- 4.10
- 4.11
- 4.11
- 4.11
- 5.0
- 5.0
- 5.0
- 5.0
- 5.1
- 5.1
- 5.1
- 5.1
- 5.1
- 5.2
- 5.2.1
- 5.2.1
- 5.3
- 5.3
- 5.3
- 5.3
- 5.4
- 5.4
- 5.4
- 5.4
- 6.0
- 6.0
- 2.0
- 3.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.85% (0.01847) | 78.34th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.80% (0.01804) | 75.63th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.16% (0.01155) | 77.07th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.83% (0.01830) | 88.72th | v3 (v2023.03.01) |
| May 19, 2023 | 1.83% (0.01830) | 86.44th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.96% (0.01962) | 86.89th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
No CWE recorded.
References (7)
- ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:11.ipsec.asc vendor-advisoryx_refsource_FREEBSDPatchVendor Advisory
- ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2006-011.txt.asc vendor-advisoryx_refsource_NETBSD
- http://secunia.com/advisories/19366 third-party-advisoryx_refsource_SECUNIAPatchVendor Advisory
- http://securitytracker.com/id?1015809 vdb-entryx_refsource_SECTRACK
- http://www.osvdb.org/24068 vdb-entryx_refsource_OSVDB
- http://www.securityfocus.com/bid/17191 vdb-entryx_refsource_BIDPatch
- https://exchange.xforce.ibmcloud.com/vulnerabilities/25398 vdb-entryx_refsource_XF
| Link | Providers | Tags |
|---|---|---|
| ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:11.ipsec.asc | vendor-advisoryx_refsource_FREEBSDPatchVendor Advisory | |
| ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2006-011.txt.asc | vendor-advisoryx_refsource_NETBSD | |
| http://secunia.com/advisories/19366 | third-party-advisoryx_refsource_SECUNIAPatchVendor Advisory | |
| http://securitytracker.com/id?1015809 | vdb-entryx_refsource_SECTRACK | |
| http://www.osvdb.org/24068 | vdb-entryx_refsource_OSVDB | |
| http://www.securityfocus.com/bid/17191 | vdb-entryx_refsource_BIDPatch | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/25398 | vdb-entryx_refsource_XF |
Change history (0)
No recorded changes yet.