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.
*CVSS:
| Base Score: | 5 |
| Access Vector: | Network |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | Partial |
| Availability Impact: | None |
| Temporal Score: | 3.7 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Other
Remedy:
Apply the patch for this vulnerability (dns_random.cc), available from the PowerDNS Web site. See References.
References:
- oss-security Mailing List, Thu, 10 Jul 2008 16:27:33 +0200: DNS vulnerability: other relevant software.
- oss-security Mailing List, Wed, 09 Jul 2008 18:51:36 +0200: CVE request: PowerDNS recursor source port randomization.
- oss-security Mailing List, Wed, 16 Jul 2008 21:12:44 +0200: CVE request: PowerDNS recursor source port randomization.
- PowerDNS Web site: DOWNLOADS.
- 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
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
Reported:
Jul 16, 2008
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.