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Servers and applications

CVE-2010-1128

The Linear Congruential Generator (LCG) in PHP before 5.2.13 does not provide the expected entropy, which makes it easier for context-dependent attackers to guess values that were intended to be unpredictable, as demonstrated by session cookies generated by using the uniqid function.

Severity
Medium 6.4
Published
26 Mar 2010
Last changed
16 Jun 2026
Added to UpHeron
14 Oct 2026
Exploit chance
8.1% in the next 30 daysHigher than 94% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
CWE-310
Attack
Over the network · No login needed
Attacker can
Read some data · Change some data
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:N
Sources
NVD

Affected software

SoftwareAffected versions
PHPServers and applications · cpe:a:php:php
  • Version 5.2.11
  • Version 5.2.10
  • Version 5.2.9
  • Version 5.2.8
All 13 release lines
  • Every version up to 5.2.12
  • Version 5.2.0
  • Version 5.2.1
  • Version 5.2.2
  • Version 5.2.3
  • Version 5.2.4
  • Version 5.2.5
  • Version 5.2.6
  • Version 5.2.7
  • Version 5.2.8
  • Version 5.2.9
  • Version 5.2.10
  • Version 5.2.11

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2010-1128
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2010-1128