CVE-2010-1128

Severity: medium (CVSS 6.4 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 8.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2010-03-26 · updated 2026-06-16
Weakness: CWE-310

Description

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.

Affected products

PHP: through 5.2.12; 5.2.0, 5.2.1, 5.2.2, 5.2.3, 5.2.4, 5.2.5 (+6)

References

http://secunia.com/advisories/38708
http://secunia.com/advisories/42410
http://www.php.net/ChangeLog-5.php
http://www.php.net/releases/5_2_13.php
http://www.redhat.com/support/errata/RHSA-2010-0919.html
http://www.securityfocus.com/bid/38430
http://www.vupen.com/english/advisories/2010/0479
http://www.vupen.com/english/advisories/2010/3081
http://secunia.com/advisories/38708
http://secunia.com/advisories/42410
http://www.php.net/ChangeLog-5.php
http://www.php.net/releases/5_2_13.php

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