MEDIUM
A certain pseudo-random number generator (PRNG) algorithm that uses XOR and 2-bit random hops (aka "Algorithm X2"), as used in OpenBSD 2.6 through 3.4, Mac OS X 10 through 10.5.1, FreeBSD 4.4 through 7.0, and DragonFlyBSD 1.0 through 1.10.1, allows remote attackers to guess sensitive values such as IP fragmentation IDs by observing a sequence of previously generated values
Published Mar 4, 2008
6.8
MEDIUMCVSS 2.0
EPSS 1.77%
Description
A certain pseudo-random number generator (PRNG) algorithm that uses XOR and 2-bit random hops (aka "Algorithm X2"), as used in OpenBSD 2.6 through 3.4, Mac OS X 10 through 10.5.1, FreeBSD 4.4 through 7.0, and DragonFlyBSD 1.0 through 1.10.1, allows remote attackers to guess sensitive values such as IP fragmentation IDs by observing a sequence of previously generated values. NOTE: this issue can be leveraged for attacks such as injection into TCP packets and OS fingerprinting.
Affected products
No data.
AND
Running on/with
OR
- 10.0
- 10.0.1
- 10.0.2
- 10.0.3
- 10.0.4
- 10.1
- 10.1.1
- 10.1.2
- 10.1.3
- 10.1.4
- 10.1.5
- 10.2
- 10.2.1
- 10.2.2
- 10.2.3
- 10.2.4
- 10.2.5
- 10.2.6
- 10.2.7
- 10.2.8
- 10.3
- 10.3.1
- 10.3.2
- 10.3.3
- 10.3.4
- 10.3.5
- 10.3.6
- 10.3.7
- 10.3.8
- 10.3.9
- 10.4
- 10.4.1
- 10.4.2
- 10.4.3
- 10.4.4
- 10.4.5
- 10.4.6
- 10.4.7
- 10.4.8
- 10.4.9
- 10.4.10
- 10.4.11
- 10.5
- 10.5.1
- 10.0
- 10.1
- 10.1.1
- 10.1.2
- 10.1.3
- 10.1.4
- 10.1.5
- 10.2
- 10.2.1
- 10.2.2
- 10.2.3
- 10.2.4
- 10.2.5
- 10.2.6
- 10.2.7
- 10.2.8
- 10.3
- 10.3.1
- 10.3.2
- 10.3.3
- 10.3.4
- 10.3.5
- 10.3.6
- 10.3.7
- 10.3.8
- 10.3.9
- 10.4
- 10.4.1
- 10.4.2
- 10.4.3
- 10.4.4
- 10.4.5
- 10.4.6
- 10.4.7
- 10.4.8
- 10.4.9
- 10.4.10
- 10.4.11
- 10.5
- 1.0
- 1.1
- 1.2
- 1.10.1
- 4.4
- 4.4
- 4.4
- 4.4
- 4.5
- 4.5
- 4.5
- 4.5
- 4.5
- 4.6
- 4.6
- 4.6
- 4.6
- 4.6
- 4.6.2
- 4.7
- 4.7
- 4.7
- 4.7
- 4.7
- 4.8
- 4.8
- 4.8
- 4.8_prerelease
- 4.9
- 4.9
- 4.9_prerelease
- 4.10
- 4.10
- 4.10
- 4.10
- 4.10_prerelease
- 4.11
- 4.11
- 4.11
- 4.11_p20_release
- 4.11_release
- 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
- 5.5_release
- 5.5_stable
- 6.0
- 6.0
- 6.0
- 6.0_p5_release
- 6.1
- 6.1
- 6.1
- 6.1
- 6.2
- 6.2
- 6.2_releng
- 6.3
- 6.3_releng
- 7.0
- 7.0_beta4
- 7.0_releng
- 1.6.2
- 2.0
- 2.0.1
- 2.0.2
- 2.0.3
- 2.0.4
- 2.1
- 2.1.1
- 3.0.1
- 3.0.2
- 3.1
- 3.1
- 3.1
- 4.0
- 4.0
- 4.0
- 2.6
- 2.7
- 2.8
- 2.9
- 3.0
- 3.1
- 3.2
- 3.3
- 3.4
- 3.5
- 3.6
- 3.7
- 3.8
- 3.9
- 4.0
- 4.1
- 4.2
OR
- 10.0.3
- 1.0
- 9.1
- 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.
6.8 MEDIUM NVD
AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.77% 0.01772
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.01772
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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.77% (0.01772) | 77.34th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.77% (0.01772) | 75.18th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.33% (0.01327) | 78.58th | v4 (v2025.03.14) |
| Dec 12, 2024 | 2.27% (0.02269) | 90.01th | v3 (v2023.03.01) |
| Mar 10, 2024 | 1.50% (0.01496) | 86.54th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.38% (0.01383) | 84.25th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.96% (0.01955) | 78.47th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.96% (0.01955) | 76.59th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.96% (0.01955) | 55.71th | v2 (v2022.01.01) |
Weaknesses (0)
No CWE recorded.
References (10)
- http://seclists.org/bugtraq/2008/Feb/0052.html mailing-listx_refsource_BUGTRAQ
- http://seclists.org/bugtraq/2008/Feb/0063.html mailing-listx_refsource_BUGTRAQ
- http://secunia.com/advisories/28819 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/netinet/ip_id.c?rev=1.10%3Bcontenttype= x_refsource_CONFIRM
- http://www.securiteam.com/securityreviews/5PP0H0UNGW.html x_refsource_MISC
- http://www.securityfocus.com/archive/1/487658 mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/bid/27647 vdb-entryx_refsource_BID
- http://www.trusteer.com/docs/OpenBSD_DNS_Cache_Poisoning_and_Multiple_OS_Predictable_IP_ID_Vulnerability.pdf x_refsource_MISC
- https://exchange.xforce.ibmcloud.com/vulnerabilities/40329 vdb-entryx_refsource_XF
- https://exchange.xforce.ibmcloud.com/vulnerabilities/41155 vdb-entryx_refsource_XF
| Link | Providers | Tags |
|---|---|---|
| http://seclists.org/bugtraq/2008/Feb/0052.html | mailing-listx_refsource_BUGTRAQ | |
| http://seclists.org/bugtraq/2008/Feb/0063.html | mailing-listx_refsource_BUGTRAQ | |
| http://secunia.com/advisories/28819 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/netinet/ip_id.c?rev=1.10%3Bcontenttype= | x_refsource_CONFIRM | |
| http://www.securiteam.com/securityreviews/5PP0H0UNGW.html | x_refsource_MISC | |
| http://www.securityfocus.com/archive/1/487658 | mailing-listx_refsource_BUGTRAQ | |
| http://www.securityfocus.com/bid/27647 | vdb-entryx_refsource_BID | |
| http://www.trusteer.com/docs/OpenBSD_DNS_Cache_Poisoning_and_Multiple_OS_Predictable_IP_ID_Vulnerability.pdf | x_refsource_MISC | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/40329 | vdb-entryx_refsource_XF | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/41155 | vdb-entryx_refsource_XF |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Mar 4, 2008
Updated Aug 7, 2024
Reserved Mar 4, 2008
Link CVE-2008-1147
CISA Vulnrichment
Updated n/a