Description
Header.pm in Net::DNS before 0.60, a Perl module, (1) generates predictable sequence IDs with a fixed increment and (2) can use the same starting ID for all child processes of a forking server, which allows remote attackers to spoof DNS responses, as originally reported for qpsmtp and spamassassin.
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 14 | libnet-dns-perl | 0.60-1 | — |
| Debian 13 | libnet-dns-perl | 0.60-1 | — |
| Debian 12 | libnet-dns-perl | 0.60-1 | — |
| Debian 4.0 | libnet-dns-perl | 0.59-1etch1 | DSA-1515-1 |
| Debian 3.1 | libnet-dns-perl | 0.48-1sarge1 | DSA-1515-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | perl-Net-DNS | 0.59-3.el5 | RHSA-2007:0674 |
| RHEL 4 | perl-Net-DNS | 0.48-2.el4 | RHSA-2007:0675 |
| RHEL 3 | perl-Net-DNS | 0.31-4.el3 | RHSA-2007:0674 |
Advisories 3
- RHSA-2007:0675 Red Hat Security Advisory: perl-Net-DNS security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2007:0674 Red Hat Security Advisory: perl-Net-DNS security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1515-1 libnet-dns-perl - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- 26231 third-party-advisory
- 26417 third-party-advisory
- 29354 third-party-advisory
- 26014 third-party-advisory
- RHSA-2007:0675 vendor-advisory
- oval:org.mitre.oval:def:9904 vdb-entry signature
- 26012 third-party-advisory
- DSA-1515 vendor-advisory
- http://www.net-dns.org/docs/Changes.html
- SUSE-SR:2007:017 vendor-advisory
- 26543 third-party-advisory
- netdns-dns-responses-spoofing(35112) vdb-entry
- http://support.avaya.com/elmodocs2/security/ASA-2007-351.htm
- USN-483-1 vendor-advisory
- 2007-0023 vendor-advisory
- MDKSA-2007:146 vendor-advisory
- RHSA-2007:0674 vendor-advisory
- 26055 third-party-advisory
- 26211 third-party-advisory
- 37053 vdb-entry
- 26075 third-party-advisory
- 1018377 vdb-entry
- 26508 third-party-advisory
- 24669 vdb-entry
- http://rt.cpan.org/Public/Bug/Display.html?id=23961
- 25829 third-party-advisory
- https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=245458
- GLSA-200708-06 vendor-advisory
- 20070717 rPSA-2007-0142-1 perl-Net-DNS mailing-list
- http://www.nntp.perl.org/group/perl.qpsmtpd/2006/03/msg4810.html