Bug 440247 - (CVE-2008-1637) CVE-2008-1637 pdns-recursor: perdictable query ids
CVE-2008-1637 pdns-recursor: perdictable query ids
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
: Security
Depends On: 440248 440249 440250
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Reported: 2008-04-02 10:27 EDT by Tomas Hoger
Modified: 2015-03-02 05:33 EST (History)
1 user (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2008-04-24 07:21:20 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Tomas Hoger 2008-04-02 10:27:05 EDT
Amit Klein of Trusteer discovered and documented weakness in a way PowerDNS
Recursor generates DNS queries and transaction IDs used in DNS queries.  This
weakness can be used to predict transaction IDs used in a subsequent queries
after observing certain amount of consequent previous queries, leading to a high
possibility of performing a successful cache poisoning attack.

PowerDNS Recursor 3.1.5 was released to address this issue.

Comment 2 Tomas Hoger 2008-04-02 13:09:21 EDT
CVE-2008-1637 was assigned to this issue:

PowerDNS Recursor before 3.1.5 uses insufficient randomness to
calculate (1) TRXID values and (2) UDP source port numbers, which
makes it easier for remote attackers to poison a DNS cache, related to
(a) algorithmic deficiencies in rand and random functions in external
libraries, (b) use of a 32-bit seed value, and (c) choice of the time
of day as the sole seeding information.
Comment 3 Fedora Update System 2008-04-05 08:41:12 EDT
pdns-recursor-3.1.5-1.fc8 has been submitted as an update for Fedora 8
Comment 4 Fedora Update System 2008-04-05 08:42:52 EDT
pdns-recursor-3.1.5-1.fc7 has been submitted as an update for Fedora 7
Comment 5 Fedora Update System 2008-04-09 01:20:41 EDT
pdns-recursor-3.1.5-1.fc7 has been pushed to the Fedora 7 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 6 Fedora Update System 2008-04-09 01:22:15 EDT
pdns-recursor-3.1.5-1.fc8 has been pushed to the Fedora 8 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 7 Red Hat Product Security 2008-04-24 07:21:20 EDT
This issue was addressed in:


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