National Vulnerability Database

National Vulnerability Database

National Vulnerability

CVE-2010-1128 Detail


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.

Source:  MITRE      Last Modified:  03/26/2010

Quick Info

CVE Dictionary Entry:
Original release date:
Last revised:


CVSS Severity (version 2.0):
CVSS v2 Base Score:
(AV:N/AC:L/Au:N/C:P/I:P/A:N) (legend)
Impact Subscore:
Exploitability Subscore:
CVSS Version 2 Metrics:
Access Vector:
Network exploitable
Access Complexity:
Not required to exploit
Impact Type:
Allows unauthorized disclosure of information; Allows unauthorized modification

Vendor Statements (disclaimer)

Official Statement from Red Hat (04/14/2010)

Red Hat is aware of this issue and is tracking it via the following bug: The Red Hat Security Response Team has rated this issue as having low security impact, a future update may address this flaw. More information regarding issue severity can be found here:

References to Advisories, Solutions, and Tools

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Hyperlink Resource Type Source Name External Source CONFIRM Vendor Advisory External Source CONFIRM External Source REDHAT RHSA-2010:0919 Exploit External Source BID 38430 Patch; Vendor Advisory External Source VUPEN ADV-2010-0479 External Source VUPEN ADV-2010-3081

Technical Details

Vulnerability Type (View All)

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