CVE-2008-2108

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-01. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 4%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

The GENERATE_SEED macro in PHP 4.x before 4.4.8 and 5.x before 5.2.5, when running on 64-bit systems, performs a multiplication that generates a portion of zero bits during conversion due to insufficient precision, which produces 24 bits of entropy and simplifies brute force attacks against protection mechanisms that use the rand and mt_rand functions.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
90.0%
KEV
Not listed

Published

May 7, 2008

Last Modified

April 23, 2026

Advisory Details (8)

Auto-updated May 12, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

PHP GENERATE_SEED() Weak Random Number Seed Vulnerability - CXSecurity.com

http://securityreason.com/securityalert/3859
generic

PHP: Multiple vulnerabilities (GLSA 200811-05) — Gentoo security

http://security.gentoo.org/glsa/glsa-200811-05.xml
generic

About Secunia Research | Flexera

http://secunia.com/advisories/32746
generic

About Secunia Research | Flexera

http://secunia.com/advisories/31200
generic

About Secunia Research | Flexera

http://secunia.com/advisories/31124
generic

About Secunia Research | Flexera

http://secunia.com/advisories/31119
generic

About Secunia Research | Flexera

http://secunia.com/advisories/30828
generic

About Secunia Research | Flexera

http://secunia.com/advisories/30757

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuphp5-curl (5.2.3-1ubuntu6.4) @ gutsy2026-05-20ubuntu
redhatphp-0:5.1.6-3.el4s1.102008-07-22redhat
redhatphp-0:4.1.2-2.202008-07-16redhat
redhatphp-0:5.1.6-20.el5_2.12008-07-16redhat
redhatphp-0:4.3.9-3.22.122008-07-16redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(5)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 6× in last 7d / 42× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 111 total refreshes for this CVE.

  1. 2026-07-13 22:25 UTCEPSS rescore
  2. 2026-07-13 06:07 UTCEPSS rescore
  3. 2026-07-11 08:22 UTCEPSS rescore
  4. 2026-07-11 08:22 UTCEPSS rescore
  5. 2026-07-09 19:04 UTCEPSS rescore
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  10. 2026-07-05 02:26 UTCEPSS rescore
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  13. 2026-07-02 14:00 UTCEPSS rescore
  14. 2026-07-01 15:02 UTCEPSS rescore
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  16. 2026-06-30 23:19 UTCEPSS rescore
  17. 2026-06-29 14:02 UTCEPSS rescore
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  21. 2026-06-27 03:04 UTCEPSS rescore
  22. 2026-06-25 13:46 UTCEPSS rescore
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  24. 2026-06-24 14:02 UTCEPSS rescore
  25. 2026-06-24 14:02 UTCEPSS rescore
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  1. 2026-06-23 21:29 UTCEPSS rescore
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  7. 2026-06-21 01:56 UTCEPSS rescore
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  9. 2026-06-19 19:22 UTCEPSS rescore
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  11. 2026-06-18 17:49 UTCEPSS rescore
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  17. 2026-06-15 17:44 UTCEPSS rescore
  18. 2026-06-13 22:57 UTCEPSS rescore
  19. 2026-06-12 23:08 UTCEPSS rescore
  20. 2026-06-12 23:08 UTCEPSS rescore
  21. 2026-06-11 13:56 UTCEPSS rescore
  22. 2026-06-10 22:14 UTCEPSS rescore
  23. 2026-06-10 13:17 UTCEPSS rescore
  24. 2026-06-08 14:13 UTCEPSS rescore
  25. 2026-06-07 15:22 UTCEPSS rescore
  26. 2026-06-06 13:44 UTCEPSS rescore
  27. 2026-06-06 13:44 UTCEPSS rescore
  28. 2026-06-05 22:44 UTCEPSS rescore
  29. 2026-06-05 22:44 UTCEPSS rescore
  30. 2026-06-05 06:07 UTCEPSS rescore
  31. 2026-06-04 13:09 UTCEPSS rescore
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  35. 2026-06-01 13:49 UTCEPSS rescore
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  38. 2026-05-31 22:28 UTCEPSS rescore
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  40. 2026-05-31 00:13 UTCEPSS rescore
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  42. 2026-05-29 13:40 UTCEPSS rescore
  43. 2026-05-28 13:42 UTCEPSS rescore
  44. 2026-05-28 13:42 UTCEPSS rescore
  45. 2026-05-28 13:42 UTCEPSS rescore
  46. 2026-05-27 13:38 UTCEPSS rescore
  47. 2026-05-27 13:37 UTCEPSS rescore
  48. 2026-05-26 13:41 UTCEPSS rescore
  49. 2026-05-26 13:41 UTCEPSS rescore
  50. 2026-05-26 07:16 UTCEPSS rescore
  51. 2026-05-26 07:16 UTCEPSS rescore
  52. 2026-05-24 16:43 UTCEPSS rescore
  53. 2026-05-22 21:15 UTCEPSS rescore
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  55. 2026-05-20 22:37 UTCEPSS rescore
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  57. 2026-05-20 11:20 UTCEPSS rescore
  58. 2026-05-20 11:20 UTCEPSS rescore
  59. 2026-05-20 11:12 UTCEG score recompute
  60. 2026-05-20 11:12 UTCVendor advisory
  61. 2026-05-20 11:12 UTCGHSA enrichment
  62. 2026-05-20 06:48 UTCEG score recompute
  63. 2026-05-20 06:48 UTCVendor advisory
  64. 2026-05-20 06:48 UTCGHSA enrichment
  65. 2026-05-20 02:42 UTCEG score recompute
  66. 2026-05-20 02:42 UTCVendor advisory
  67. 2026-05-20 02:42 UTCGHSA enrichment
  68. 2026-05-19 22:45 UTCEG score recompute
  69. 2026-05-19 22:45 UTCVendor advisory
  70. 2026-05-19 22:45 UTCGHSA enrichment
  71. 2026-05-19 18:42 UTCEG score recompute
  72. 2026-05-19 18:42 UTCVendor advisory
  73. 2026-05-19 18:42 UTCGHSA enrichment
  74. 2026-05-19 14:34 UTCEG score recompute
  75. 2026-05-19 14:34 UTCVendor advisory

Frequently asked(5)

What is CVE-2008-2108?
CVE-2008-2108 is a critical vulnerability published on May 7, 2008. The GENERATESEED macro in PHP 4.x before 4.4.8 and 5.x before 5.2.5, when running on 64-bit systems, performs a multiplication that generates a portion of zero bits during conversion due to insufficient precision, which produces 24 bits of entropy and simplifies brute force attacks against…
When was CVE-2008-2108 disclosed?
CVE-2008-2108 was first published in the National Vulnerability Database on May 7, 2008, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2008-2108 actively exploited?
CVE-2008-2108 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2008-2108?
CVE-2008-2108 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2008-2108?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2008-2108, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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