Rust advisories / asn1_der
Vulnerability HighRUSTSEC-2019-0007 · asn1_der
RUSTSEC-2019-0007: Processing of maliciously crafted length fields causes memory allocation SIGABRTs
Short answerA security vulnerability in the asn1_der crate: Processing of maliciously crafted length fields causes memory allocation SIGABRTs. High severity (CVSS 7.5). Fixed in 0.6.2: update to a fixed version.
| Crate | asn1_der |
|---|---|
| Type | Vulnerability |
| Affected versions | Before 0.6.2. |
| Fixed in | 0.6.2 |
| 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 | 2019-06-13 |
| Last changed | 2023-11-08 |
| Also known as | CVE-2019-15549, GHSA-v5r6-6r3c-wqxc |
What to do
- See which version you have:
cargo tree -i asn1_der(it also shows which of your dependencies pulls it in). - Update within your version requirement:
cargo update -p asn1_der. If the fix is a newer major or minor than your requirement allows, raise it in Cargo.toml (for exampleasn1_der = "0.6.2") 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
Affected versions of this crate tried to preallocate a vector for an arbitrary amount of bytes announced by the ASN.1-DER length field without further checks.
This allows an attacker to trigger a SIGABRT by creating length fields that announce more bytes than the allocator can provide.
The flaw was corrected by not preallocating memory.
References
- Package: crates.io/crates/asn1_der
- Advisory: rustsec.org/advisories/RUSTSEC-2019-0007.html
- Report: github.com/KizzyCode/asn1_der/issues/1
From the RustSec Advisory Database (CC0-1.0) via the OSV export, downloaded Oct 24, 2026. Severity score computed from the published CVSS vector.
Up next
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