Vulnerabilities affecting this package (0)
| Vulnerability |
Summary |
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This package is not known to be affected by vulnerabilities.
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Vulnerabilities fixed by this package (6)
| Vulnerability |
Summary |
Aliases |
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VCID-88zm-3r8x-uucc
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envoyproxy/envoy: excessive CPU usage when handling a large number of HTTP/2 requests
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CVE-2021-32778
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VCID-9m6a-v8jm-d3da
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Istio Fragments in Path May Lead to Authorization Policy Bypass
### Impact
Istio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio’s URI path based authorization policies.
### Patches
* Istio 1.11.1 and above
* Istio 1.10.4 and above
* Istio 1.9.8 and above
### Workarounds
A Lua filter may be written to normalize the path. This is similar to the Path normalization presented in the [Security Best Practices](https://istio.io/latest/docs/ops/best-practices/security/#case-normalization) guide.
### References
More details can be found in the [Istio Security Bulletin](https://istio.io/latest/news/security/istio-security-2021-008)
### For more information
If you have any questions or comments about this advisory, please email us at istio-security-vulnerability-reports@googlegroups.com
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CVE-2021-39156
GHSA-hqxw-mm44-gc4r
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VCID-bkgs-gvbv-aqcy
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envoyproxy/envoy: denial of service when using extensions that modify request or response sizes
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CVE-2021-32781
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VCID-bu8w-z79j-c3dh
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Authorization Policy Bypass Due to Case Insensitive Host Comparison
### Impact
According to [RFC 4343](https://datatracker.ietf.org/doc/html/rfc4343), Istio authorization policy should compare the hostname in the HTTP Host header in a case insensitive way, but currently the comparison is case sensitive. The Envoy proxy will route the request hostname in a case-insensitive way which means the authorization policy could be bypassed.
As an example, the user may have an authorization policy that rejects request with hostname "httpbin.foo" for some source IPs, but the attacker can bypass this by sending the request with hostname "Httpbin.Foo".
### Patches
* Istio 1.11.1 and above
* Istio 1.10.4 and above
* Istio 1.9.8 and above
### Workarounds
A Lua filter may be written to normalize Host header before the authorization check. This is similar to the Path normalization presented in the [Security Best Practices](https://istio.io/latest/docs/ops/best-practices/security/#case-normalization) guide.
### References
More details can be found in the [Istio Security Bulletin](https://istio.io/latest/news/security/istio-security-2021-008).
### For more information
If you have any questions or comments about this advisory, please email us at istio-security-vulnerability-reports@googlegroups.com
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CVE-2021-39155
GHSA-7774-7vr3-cc8j
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VCID-vard-hwsg-ukex
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envoyproxy/envoy: HTTP request with multiple value headers can bypass authorization policies
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CVE-2021-32777
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VCID-zp2r-e3z8-7qc3
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envoyproxy/envoy: denial of service when receiving a GOAWAY frame followed by a SETTINGS frame
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CVE-2021-32780
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