PatchTheCVECVE-2018-20994: An issue was discovered in the trust-dns-proto crate before 0.5.0-alpha.3 for Rust
CVE-2018-20994 is a high-severity flaw (CVSS 7.5) affecting trust-dns-proto. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An issue was discovered in the trust-dns-proto crate before 0.5.0-alpha.3 for Rust. There is infinite recursion because DNS message compression is mishandled.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.4% (top 27%) |
| CISA exploited list | No |
| Weakness | CWE-674 |
| Published | 2019-08-26 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2018-20994?
trust-dns-proto: upgrade to 0.4.3. Exact commands for each OS are on this page.
Is CVE-2018-20994 being exploited?
CVE-2018-20994 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2018-20994 affect?
CVE-2018-20994 affects trust-dns-proto. Severity is high (CVSS 7.5). An issue was discovered in the trust-dns-proto crate before 0.5.0-alpha.3 for Rust. There is infinite recursion because DNS message compression is mishandled.
How urgent is CVE-2018-20994?
Priority 49/100. High severity; Remotely exploitable, no login, no user action