9.8

CVE-2008-2108: canonical ubuntu_linux Insufficient Entropy

Modified
Published 07-05-2008Last modified 07-08-2024

Vulnerability summary

CVE-2008-2108 is a critical (CVSS 9.8) Insufficient Entropy vulnerability in canonical ubuntu_linux. EPSS estimates a 4.29% chance of exploitation in the next 30 days, higher than 91.1% of scored vulnerabilities. 2 public exploits are recorded.

Priority
Prioritisepublic exploit

Public exploit (reference, Date unknown)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
4.29%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits2reference

Advisory lineage

Upstream 0 · Downstream 6
DSA-1789-1RHSA-2008:0505RHSA-2008:0544RHSA-2008:0545RHSA-2008:0546RHSA-2008:0582

Timeline

  1. 07-05-2008
    PublishedVulnerability first disclosed.
  2. 07-08-2024
    Last modifiedVulnerability information updated.

Description

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 metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

4.29%

Chance of exploitation in the next 30 days

Percentile

91%

Versus all other CVEs

30-day change

No change 0.00 pp

From 4.29% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

2 found
  • referenceUnverified

    Exploit Reference (archives.neohapsis.com)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (sektioneins.de)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Canonical1 product
Debian1 product
Fedoraproject1 product
Php1 product
  • php≥ 4.0.0, < 4.4.8 | ≥ 5.0.0, < 5.2.5

4 vendors · 4 products

References

29 links
Show all 29 references