Description
PyDNS (aka python-dns) before 2.3.1-5 in Debian GNU/Linux does not use random source ports for DNS requests and does not use random transaction IDs for DNS retries, which makes it easier for remote attackers to spoof DNS responses, a different vulnerability than CVE-2008-1447. NOTE: this vulnerability exists because of an incomplete fix for CVE-2008-4099.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 4.0 | python-dns | 2.3.0-5.2+etch1 | DSA-1619-1 |
Advisories 1
- DSA-1619-1 python-dns - DNS response spoofing Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://packages.debian.org/changelogs/pool/main/p/python-dns/python-dns_2.3.3-1/changelog
- [oss-security] 20080911 Re: CVE Request (ruby -- DNS spoofing vulnerability in resolv.rb) mailing-list
- [oss-security] 20080915 Re: CVE Request (ruby -- DNS spoofing vulnerability in resolv.rb) mailing-list
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=490217