Description
Net/DNS/RR/A.pm in Net::DNS 0.60 build 654, as used in packages such as SpamAssassin and OTRS, allows remote attackers to cause a denial of service (program "croak") via a crafted DNS response.
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 | 0.63-1 | — |
| Debian 13 | libnet-dns-perl | 0.63-1 | — |
| Debian 12 | libnet-dns-perl | 0.63-1 | — |
| Debian 4.0 | libnet-dns-perl | 0.59-1etch1 | DSA-1515-1 |
| Debian 3.1 | libnet-dns-perl | 0.48-1sarge1 | DSA-1515-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Perl Net::DNS 0.48/0.59/0.60 - DNS Response Remote Denial of Service EDB-30895 · dos · Dec 17, 2007 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- DSA-1515-1 libnet-dns-perl - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- 29354 third-party-advisory
- 1019104 vdb-entry
- http://search.cpan.org/src/OLAF/Net-DNS-0.63/Changes
- 29555 third-party-advisory
- DSA-1515 vendor-advisory
- https://rt.cpan.org/Public/Bug/Display.html?id=30316
- http://www.securiteam.com/unixfocus/6I00E0UKKQ.html
- 29343 third-party-advisory
- USN-594-1 vendor-advisory
- 29446 third-party-advisory
- MDVSA-2008:073 vendor-advisory
- 26902 vdb-entry