Description
Stack-based buffer overflow in dnstracer through 1.9 allows attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a command line with a long name argument that is mishandled in a strcpy call for argv[0]. An example threat model is a web application that launches dnstracer with an untrusted name string.
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 | dnstracer | No fix yet | — |
| Debian 13 | dnstracer | No fix yet | — |
| Debian 12 | dnstracer | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | dnstracer | No fix yet | — |
| Ubuntu 26.04 LTS | dnstracer | No fix yet | — |
| Ubuntu 25.10 | dnstracer | No fix yet | — |
| Ubuntu 24.04 LTS | dnstracer | No fix yet | — |
| Ubuntu 22.04 LTS | dnstracer | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | dnstracer | No fix yet | — |
| Ubuntu 18.04 LTS | dnstracer | No fix yet | — |
| Ubuntu 16.04 LTS | dnstracer | No fix yet | — |
| Ubuntu 14.04 LTS | dnstracer | No fix yet | — |
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.
Exploit-DB 2
- DNSTracer 1.9 - Local Buffer Overflow EDB-42424 · local · Aug 3, 2017
- DNSTracer 1.8.1 - Buffer Overflow (PoC) EDB-42115 · dos · Jun 5, 2017 · verified
GitHub 2 repositories
-
j0lama/Dnstracer-1.9-Fix ★ 0 · Nov 22, 2017
CVE-2017-9430 Fix
-
homjxi0e/CVE-2017-9430 ★ 0 · Jun 8, 2017
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.