Tectonic XdvApplication · Tectonic Xdv Project
CVE-2021-45703
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn issue was discovered in the tectonic_xdv crate before 0.1.12 for Rust. XdvParser::<T>::process may read from uninitialized memory locations.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceThe tectonic_xdv crate versions before 0.1.12 contain a memory safety vulnerability in the XdvParser<T>::process method, which may read from uninitialized memory locations. This could allow an attacker to obtain sensitive information from heap/stack remnants or cause undefined behavior.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
Tectonic XdvApplication
< 0.1.12CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Locate tectonic_xdv dependencySearch your project files (Cargo.toml, Cargo.lock) for 'tectonic_xdv' and note the version number specified next to itAffected if The version is missing or shows a version lower than 0.1.12 (e.g., 0.1.11, 0.1.10, etc.)
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Identify usage of vulnerable methodSearch your codebase for calls to XdvParser<T>::process or any usage of the XdvParser struct from the tectonic_xdv crateAffected if The XdvParser<T>::process method is being called in your code
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Check transitive dependenciesRun 'cargo tree -p tectonic_xdv' or inspect Cargo.lock to confirm the exact version of tectonic_xdv being compiled, including any transitive dependenciesAffected if The resolved version in Cargo.lock is lower than 0.1.12
Your environment is affected if the tectonic_xdv crate version resolved in your dependency tree is any version before 0.1.12 and your code calls the XdvParser<T>::process method.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped0.1.12
Upgrade the tectonic_xdv crate to version 0.1.12 or later to obtain the patch for the uninitialized memory read vulnerability.
0.1.12
- Update the tectonic_xdv dependency in Cargo.toml to version 0.1.12 or later (e.g., tectonic_xdv = "0.1.12")
- Run `cargo update tectonic_xdv` to fetch the fixed version
- Run `cargo build` to verify the upgrade compiles successfully
- Test the application to ensure the upgrade does not introduce regressions
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Tectonic Xdv
Scoped from the published advisory
- Consultation4.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,544.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-45703 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-45703 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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