What is CVE-2018-20992?

CVE-2018-20992 is a medium-severity security vulnerability in claxon (rust), affecting versions >= 0.4.0, < 0.4.1. It is fixed in 0.4.1, 0.3.2.

How severe is CVE-2018-20992?

CVE-2018-20992 has a CVSS score of 6.5 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Which versions of claxon are affected by CVE-2018-20992?

claxon (rust) versions >= 0.4.0, < 0.4.1 is affected.

Is there a fix for CVE-2018-20992?

Yes. CVE-2018-20992 is fixed in 0.4.1, 0.3.2. Upgrade to this version or later.

Is CVE-2018-20992 exploitable, and should I be worried?

Whether CVE-2018-20992 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether CVE-2018-20992 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

How do I fix CVE-2018-20992?

Upgrade: claxon to 0.4.1 or later, claxon to 0.3.2 or later.

CVE-2018-20992 in claxon

Q: How severe is CVE-2018-20992?

CVE-2018-20992 has a CVSS score of 6.5 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Q: Which versions of claxon are affected by CVE-2018-20992?

claxon (rust) versions >= 0.4.0, < 0.4.1 is affected.

Q: Is there a fix for CVE-2018-20992?

Yes. CVE-2018-20992 is fixed in 0.4.1, 0.3.2. Upgrade to this version or later.

Q: Is CVE-2018-20992 exploitable, and should I be worried?

Whether CVE-2018-20992 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether CVE-2018-20992 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix CVE-2018-20992?

Upgrade: claxon to 0.4.1 or later, claxon to 0.3.2 or later.

Summary

Uninitialized memory exposure in claxon

Affected versions of Claxon made an invalid assumption about the decode buffer size being a multiple of a value read from the bitstream. This could cause parts of the decode buffer to not be overwritten. If the decode buffer was newly allocated and uninitialized, this uninitialized memory could be exposed.

This allows an attacker to observe parts of the uninitialized memory in the decoded audio stream.

The flaw was corrected by checking that the value read from the bitstream divides the decode buffer size, and returning a format error if it does not. If an error is returned, the decode buffer is not exposed. Regression tests and an additional fuzzer have been added to prevent similar flaws in the future.

Impact

CVE-2018-20992 has a CVSS score of 6.5 (Medium). The vector is network-reachable, no privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (0.4.1, 0.3.2); upgrading removes the vulnerable code path.

Affected versions

claxon (>= 0.4.0, < 0.4.1) claxon (< 0.3.2)

Security releases

claxon → 0.4.1 (rust) claxon → 0.3.2 (rust)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

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Remediation advice

Upgrade the following packages to resolve this vulnerability:

claxon to 0.4.1 or later; claxon to 0.3.2 or later

Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.

Frequently Asked Questions

What is CVE-2018-20992? CVE-2018-20992 is a medium-severity security vulnerability in claxon (rust), affecting versions >= 0.4.0, < 0.4.1. It is fixed in 0.4.1, 0.3.2.
How severe is CVE-2018-20992? CVE-2018-20992 has a CVSS score of 6.5 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
Which versions of claxon are affected by CVE-2018-20992? claxon (rust) versions >= 0.4.0, < 0.4.1 is affected.
Is there a fix for CVE-2018-20992? Yes. CVE-2018-20992 is fixed in 0.4.1, 0.3.2. Upgrade to this version or later.
Is CVE-2018-20992 exploitable, and should I be worried? Whether CVE-2018-20992 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether CVE-2018-20992 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix CVE-2018-20992?
- Upgrade claxon to 0.4.1 or later
- Upgrade claxon to 0.3.2 or later