RHSA-2019:0741

Vulnerability from csaf_redhat - Published: 2019-04-10 20:29 - Updated: 2026-03-18 01:46
Summary
Red Hat Security Advisory: Istio-Proxy Security Update
Severity
Important
Notes
Topic: An update for Istio-Proxy is now available for Red Hat OpenShift Service Mesh Tech Preview 0.9.0. Red Hat Product Security has rated this update as having a security impact of important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Red Hat OpenShift Service Mesh is Red Hat's distribution of the Istio service mesh project, tailored for installation into an on-premise OpenShift Container Platform installation. Security fix(es): * istio-proxy: CVE-2019-9901 istio/envoy: Path traversal via URL Patch manipulation in HTTP/1.x header. (CVE-2019-9900) * istio-proxy: CVE-2019-9900 istio/envoy: Authorization bypass via null characters injection in HTTP/1.x (CVE-2019-9901) For more details about the security issue(s), including the impact, a CVSS score,acknowledgements, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2019-9900

A flaw was found in Envoy version 1.9.0 and older, where Envoy does not reject embedded zero characters (NUL, ASCII 0x0) when processing HTTP/1.x header values. This flaw allows remote attackers crafting header values containing embedded NUL characters to potentially bypass header matching rules, gaining access to unauthorized resources.

8.3 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
CWE-20 - Improper Input Validation
Affected products
Product Identifier Version Remediation
Unresolved product id: 7Server-RH7-RHOSSM-0:servicemesh-proxy-0:0.9.1-1.el7.src —
Vendor Fix fix
Unresolved product id: 7Server-RH7-RHOSSM-0:servicemesh-proxy-0:0.9.1-1.el7.x86_64 —
Vendor Fix fix
Threats
Impact Important
CVE-2019-9901

A flaw was found in Envoy version 1.9.0 and older, where Envoy does not normalize HTTP URL paths. This flaw allows a remote attacker to craft a path with a relative path and to bypass access control. This issue results in a backend server with the ability to interpret the unnormalized path.

8.3 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
CWE-20 - Improper Input Validation
Affected products
Product Identifier Version Remediation
Unresolved product id: 7Server-RH7-RHOSSM-0:servicemesh-proxy-0:0.9.1-1.el7.src —
Vendor Fix fix
Unresolved product id: 7Server-RH7-RHOSSM-0:servicemesh-proxy-0:0.9.1-1.el7.x86_64 —
Vendor Fix fix
Threats
Impact Important
References
Acknowledgments
the Envoy security team
To clipboard 

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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.