Rust advisories / trust-dns-proto
Vulnerability HighRUSTSEC-2018-0007 · trust-dns-proto
RUSTSEC-2018-0007: Stack overflow when parsing malicious DNS packet
Short answerA security vulnerability in the trust-dns-proto crate: Stack overflow when parsing malicious DNS packet. High severity (CVSS 7.5). Fixed in 0.4.3: update to a fixed version.
| Crate | trust-dns-proto |
|---|---|
| Type | Vulnerability |
| Affected versions | Before 0.4.3. |
| Fixed in | 0.4.3 |
| Severity | High, CVSS 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Published | 2018-10-09 |
| Last changed | 2023-11-08 |
| Also known as | CVE-2018-20994, GHSA-369h-pjr2-6wrh |
What to do
- See which version you have:
cargo tree -i trust-dns-proto(it also shows which of your dependencies pulls it in). - Update within your version requirement:
cargo update -p trust-dns-proto. If the fix is a newer major or minor than your requirement allows, raise it in Cargo.toml (for exampletrust-dns-proto = "0.4.3") or update the dependency that pulls it in. - Check again with
cargo audit, or paste your Cargo.lock into our Cargo.toml checker.
Details from the advisory
There's a stack overflow leading to a crash when Trust-DNS's parses a malicious DNS packet.
Affected versions of this crate did not properly handle parsing of DNS message compression (RFC1035 section 4.1.4). The parser could be tricked into infinite loop when a compression offset pointed back to the same domain name to be parsed.
This allows an attacker to craft a malicious DNS packet which when consumed with Trust-DNS could cause stack overflow and crash the affected software.
The flaw was corrected by trust-dns-proto 0.4.3 and upcoming 0.5.0 release.
References
From the RustSec Advisory Database (CC0-1.0) via the OSV export, downloaded Oct 24, 2026. Severity score computed from the published CVSS vector.
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