CVE-2008-1148

high

Description

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.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/41157

https://exchange.xforce.ibmcloud.com/vulnerabilities/40329

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

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

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

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

http://secunia.com/advisories/28819

Details

Source: Mitre, NVD

Published: 2008-03-04

Updated: 2026-06-16

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Severity: High

EPSS

EPSS: 0.00973