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.
Platforms Affected:
- Debian, Debian Linux 4.0
- Gentoo, Linux
- PowerDNS, PowerDNS prior to 3.1.5
Remedy:
Upgrade to the latest version of PowerDNS (3.1.5 or later), available from the PowerDNS Web site. See References.
Consequences:
Gain Access
References:
- PowerDNS Changelog, Recursor version 3.1.5, 31st of March 2008, PowerDNS manual at http://doc.powerdns.com/changelog.html.
- PowerDNS Web site, DOWNLOADS at http://www.powerdns.com/en/downloads.aspx.
- Trusteer Web site, PowerDNS Recursor DNS Cache Poisoning at http://www.trusteer.com/docs/PowerDNS_recursor_DNS_Cache_Poisoning.pdf.
- 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
- FrSIRT/ADV-2008-1046: PowerDNS Recursor Remote DNS Cache Poisoning Vulnerability
- GLSA-200804-22: PowerDNS Recursor: DNS Cache Poisoning
- SA29584: PowerDNS Recursor DNS Cache Poisoning Vulnerability
- SUSE-SR:2008:012: SUSE Security Summary Report
Reported:
Mar 31, 2008
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