CVE-2008-1637
pdns-recursor - predictable randomness
EPSS 0.03%
Description
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.
How to fix CVE-2008-1637
To remediate CVE-2008-1637, upgrade the affected package to a fixed version below.
- Debian/pdns-recursor—upgrade to 3.1.7-1 or later
- —upgrade to 3.1.4-1+etch1 or later
- —upgrade to 3.1.4-1+etch2 or later
Is CVE-2008-1637 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 3.1.7-1
- from 0, < 3.1.4-1+etch1
- from 0, < 3.1.4-1+etch2