National Cyber Awareness System

Vulnerability Summary for CVE-2008-1148

Overview

A certain pseudo-random number generator (PRNG) algorithm that uses ADD with 0 random hops (aka "Algorithm A0"), as used in OpenBSD 3.5 through 4.2 and NetBSD 1.6.2 through 4.0, allows remote attackers to guess sensitive values such as (1) DNS transaction IDs or (2) IP fragmentation IDs by observing a sequence of previously generated values. NOTE: this issue can be leveraged for attacks such as DNS cache poisoning, injection into TCP packets, and OS fingerprinting.

Impact

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

References to Advisories, Solutions, and Tools

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External Source: MISC

Name: http://www.trusteer.com/docs/OpenBSD_DNS_Cache_Poisoning_and_Multiple_OS_Predictable_IP_ID_Vulnerability.pdf

Hyperlink:http://www.trusteer.com/docs/OpenBSD_DNS_Cache_Poisoning_and_Multiple_OS_Predictable_IP_ID_Vulnerability.pdf

External Source: BID

Name: 27647

Hyperlink:http://www.securityfocus.com/bid/27647

External Source: BUGTRAQ

Name: 20080206 A paper by Amit Klein (Trusteer): "OpenBSD DNS Cache Poisoning and Multiple O/S Predictable IP ID Vulnerability"

Hyperlink:http://www.securityfocus.com/archive/1/487658

External Source: MISC

Name: http://www.securiteam.com/securityreviews/5PP0H0UNGW.html

Hyperlink:http://www.securiteam.com/securityreviews/5PP0H0UNGW.html

External Source: SECUNIA

Name: 28819

Type: Advisory

Hyperlink:http://secunia.com/advisories/28819

External Source: XF

Name: openbsd-add-weak-security(41157)

Hyperlink:http://xforce.iss.net/xforce/xfdb/41157

External Source: XF

Name: openbsd-prng-dns-spoofing(40329)

Hyperlink:http://xforce.iss.net/xforce/xfdb/40329