PowerDNS DNS Cache weak security
| powerdns-dnscache-weak-security (41534) |  Low Risk |
Description:
PowerDNS could provide weaker than expected security. Random numbers are generated using predictable standard C library functions and are then used to create the transaction ID (TRXID) and UDP source port. By guessing the transaction ID (TRXID) and UDP source port, a remote attacker could exploit this vulnerability to perform DNS Cache Poisoning.
*CVSS:
| Base Score: | 4.3 |
| Access Vector: | Network |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | Partial |
| Availability Impact: | None |
| Temporal Score: | 3.2 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Gain Access
Remedy:
Upgrade to the latest version of PowerDNS (3.1.5 or later), available from the PowerDNS Web site. See References.
References:
- PowerDNS Changelog, Recursor version 3.1.5, 31st of March 2008: PowerDNS manual.
- PowerDNS Web site: DOWNLOADS.
- Trusteer Web site: PowerDNS Recursor DNS Cache Poisoning.
- BID-28517: PowerDNS Remote Cache Poisoning Vulnerability
- CVE-2008-1637: 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.
- DSA-1544: pdns-recursor -- design flaw
- GLSA-200804-22: PowerDNS Recursor: DNS Cache Poisoning
- SA29584: PowerDNS Recursor DNS Cache Poisoning Vulnerability
- SUSE-SR:2008:012: SUSE Security Summary Report
- VUPEN/ADV-2008-1046: PowerDNS Recursor Remote DNS Cache Poisoning Vulnerability
Platforms Affected:
- Debian Debian Linux 4.0
- Gentoo Linux
- PowerDNS PowerDNS prior to 3.1.5
Reported:
Mar 31, 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.