CVE-2008-1147
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.
Key facts
- CVSS score
- 6.8 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P- EPSS score
- 1.8% (78th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2008-1156)
- Published
- March 4, 2008
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2008-1156 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x
- apple / mac os x server
- apple / mac os x server
- apple / mac os x server
- apple / mac os x server
- apple / mac os x server
- apple / mac os x server
and 148 more…
References
- http://seclists.org/bugtraq/2008/Feb/0052.html
- http://seclists.org/bugtraq/2008/Feb/0063.html
- http://secunia.com/advisories/28819(Vendor Advisory)
- http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/netinet/ip_id.c?rev=1.10%3Bcontenttype=
- http://www.securiteam.com/securityreviews/5PP0H0UNGW.html
- http://www.securityfocus.com/archive/1/487658
- http://www.securityfocus.com/bid/27647
- http://www.trusteer.com/docs/OpenBSD_DNS_Cache_Poisoning_and_Multiple_OS_Predictable_IP_ID_Vulnerability.pdf
- https://exchange.xforce.ibmcloud.com/vulnerabilities/40329
- https://exchange.xforce.ibmcloud.com/vulnerabilities/41155
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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