CVE-2020-35877 — OZONE
CRITICALCVE-2020-35877 is a critical-severity (CVSS 9.8) Buffer Overflow vulnerability in ozone_project ozone. No vendor fix is recorded yet; mitigation options are listed below.
An issue was discovered in the ozone crate through 2020-07-04 for Rust. Memory safety is violated because of out-of-bounds access.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2020-35877 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 385,738 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 ozone crate through 2020-07-04 for Rust. Memory safety is violated because of out-of-bounds access.
Affected Products
ozoneozone_projectDetection & mitigation playbook
Vendor / applianceDetect
Inventory every ozone_project ozone deployment and check each version against the affected-products list above.
Remediation status
No patch has shipped for CVE-2020-35877 yet — track the ozone_project ozone advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2020-35877 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.