CVE-2021-29932 — Parse Duration
HIGHCVE-2021-29932 is a high-severity (CVSS 7.5) CWE-770 vulnerability in parse_duration_project parse duration. No vendor fix is recorded yet; mitigation options are listed below.
An issue was discovered in the parse_duration crate through 2021-03-18 for Rust. It allows attackers to cause a denial of service (CPU and memory consumption) via a duration string…
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2021-29932 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 385,987 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Description
An issue was discovered in the parse_duration crate through 2021-03-18 for Rust. It allows attackers to cause a denial of service (CPU and memory consumption) via a duration string with a large exponent.
Affected Products
parse durationparse_duration_projectDetection & mitigation playbook
Vendor / applianceDetect
Inventory every parse_duration_project parse duration deployment and check each version against the affected-products list above.
Remediation status
No patch has shipped for CVE-2021-29932 yet — track the parse_duration_project parse duration advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2021-29932 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.