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    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.

    Published:Mar 4, 2008
    Last Modified:Apr 23, 2026
    EPS:Mar 4, 2008
    EPSS Score:0.01511
    CVSS Score:6.8

    Affected Products

    Vendor
    Apple
    Product
    Mac Os X
    Vendor
    Apple
    Product
    Mac Os X Server
    Vendor
    Cosmicperl
    Product
    Directory Pro
    Vendor
    Darwin
    Product
    Darwin
    Vendor
    Dragonflybsd
    Product
    Dragonflybsd
    Vendor
    Freebsd
    Product
    Freebsd
    Vendor
    Navision
    Product
    Financials Server
    Vendor
    Netbsd
    Product
    Netbsd
    Vendor
    Openbsd
    Product
    Openbsd

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://seclists.org/bugtraq/2008/Feb/0052.html
    http://seclists.org/bugtraq/2008/Feb/0063.html
    http://secunia.com/advisories/28819
    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
    http://seclists.org/bugtraq/2008/Feb/0052.html
    http://seclists.org/bugtraq/2008/Feb/0063.html
    http://secunia.com/advisories/28819
    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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High