Description
dnscache in Daniel J. Bernstein djbdns 1.05 does not prevent simultaneous identical outbound DNS queries, which makes it easier for remote attackers to spoof DNS responses, as demonstrated by a spoofed A record in the Additional section of a response to a Start of Authority (SOA) query.
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 | djbdns | 1:1.05-10 | — |
| Debian 13 | djbdns | 1:1.05-10 | — |
| Debian 12 | djbdns | 1:1.05-10 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | djbdns | No fix yet | — |
| Ubuntu 26.04 LTS | djbdns | No fix yet | — |
| Ubuntu 25.10 | djbdns | No fix yet | — |
| Ubuntu 24.04 LTS | djbdns | No fix yet | — |
| Ubuntu 22.04 LTS | djbdns | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | djbdns | No fix yet | — |
References
- http://www.your.org/dnscache/djbdns.pdf
- djbdns-soa-spoofing(48807) vdb-entry
- 33855 third-party-advisory
- 33818 vdb-entry
- http://www.your.org/dnscache/