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CVE-2019-9901

UnknownEPSS 2.68%

Last modified

CVE-2019-9901 is a vulnerability of currently unknown severity. Envoy 1.9.0 and before does not normalize HTTP URL paths. A remote attacker may craft a relative path, e.g., something/../admin, to bypass access control, e.g., a block on /admin. EPSS estimates a 2.68% chance of exploitation in the next 30 days.

Description

Envoy 1.9.0 and before does not normalize HTTP URL paths. A remote attacker may craft a relative path, e.g., something/../admin, to bypass access control, e.g., a block on /admin. A backend server could then interpret the non-normalized path and provide an attacker access beyond the scope provided for by the access control policy.

Metrics

EPSS Probability
2.68%

83.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
EnvoyproxyEnvoy<= 1.9.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-9901?
Envoy 1.9.0 and before does not normalize HTTP URL paths. A remote attacker may craft a relative path, e.g., something/../admin, to bypass access control, e.g., a block on /admin. A backend server could then interpret the non-normalized path and provide an attacker access beyond the scope provided for by the access control policy.
How severe is CVE-2019-9901?
Severity scoring for CVE-2019-9901 is pending analysis. The EPSS model estimates a 2.68% probability of exploitation in the next 30 days.
How do I fix CVE-2019-9901?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-9901?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST