How severe is CVE-2008-1147?

CVE-2008-1147 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2008-1147 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-1147?

CVE-2008-1147 primarily affects Cosmicperl Directory Pro. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-1147?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2008-1147 published?

CVE-2008-1147 was published on 2008-03-04 and last updated on 2026-06-16.

CVE-2008-1147

CVE-2008-1147 is a medium-severity vulnerability in Cosmicperl Directory Pro with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cosmicperl Directory Pro
Published: 2008-03-04
Last modified: 2026-06-16

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.

Frequently asked questions

What is 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.
How severe is CVE-2008-1147?: CVE-2008-1147 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2008-1147 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-1147?: CVE-2008-1147 primarily affects Cosmicperl Directory Pro. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-1147?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-1147 published?: CVE-2008-1147 was published on 2008-03-04 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:cosmicperl:directory_pro:10.0.3:*:*:*:*:*:*:*
cpe:2.3:a:darwin:darwin:1.0:*:*:*:*:*:*:*
cpe:2.3:a:darwin:darwin:9.1:*:*:*:*:*:*:*
cpe:2.3:a:navision:financials_server:3.0:*:*:*:*:*:*:*

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