PowerDNS Recursor random number generator weak security
| powerdns-recursor-rng-weak-security (43925) |  Medium Risk |
Description:
PowerDNS Recursor could provide weaker than expected security, caused by the failure to use a strong random number generator (RNG) during source port selection. A remote attacker could exploit this vulnerability to guess the next DNS transaction ID and perform DNS Cache Poisoning.
Platforms Affected:
- Debian, Debian Linux 4.0
- Gentoo, Linux
- PowerDNS, Recursor 3.0
- PowerDNS, Recursor 3.0.1
- PowerDNS, Recursor 3.1.1
- PowerDNS, Recursor 3.1.2
- PowerDNS, Recursor 3.1.3
- PowerDNS, Recursor 3.1.4
- PowerDNS, Recursor 3.1.5
Remedy:
Apply the patch for this vulnerability (dns_random.cc), available from the PowerDNS Web site. See References.
Consequences:
Other
References:
- oss-security Mailing List, Thu, 10 Jul 2008 16:27:33 +0200, DNS vulnerability: other relevant software at http://www.openwall.com/lists/oss-security/2008/07/10/6.
- oss-security Mailing List, Wed, 09 Jul 2008 18:51:36 +0200, CVE request: PowerDNS recursor source port randomization at http://www.openwall.com/lists/oss-security/2008/07/09/10.
- oss-security Mailing List, Wed, 16 Jul 2008 21:12:44 +0200, CVE request: PowerDNS recursor source port randomization at http://www.openwall.com/lists/oss-security/2008/07/16/12.
- PowerDNS Web site, DOWNLOADS at http://wiki.powerdns.com/cgi-bin/trac.fcgi/changeset/1179.
- BID-30782: PowerDNS Source Port Randomization Remote Cache Poisoning Vulnerability
- CVE-2008-3217: PowerDNS Recursor before 3.1.6 does not always use the strongest random number generator for source port selection, which makes it easier for remote attack vectors to conduct DNS cache poisoning. NOTE: this is related to incomplete integration of security improvements associated with addressing CVE-2008-1637.
- DSA-1544: pdns-recursor -- design flaw
- GLSA-200804-22: PowerDNS Recursor: DNS Cache Poisoning
Reported:
Jul 16, 2008
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