CVE-2023-27493
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- CVE-2023-27493
CVE Details
| Release Date: | 2023-04-04 |
Description
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, Envoy does not sanitize or escape request properties when generating request headers. This can lead to characters that are illegal in header values to be sent to the upstream service. In the worst case, it can cause upstream service to interpret the original request as two pipelined requests, possibly bypassing the intent of Envoy's security policy. Versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9 contain a patch. As a workaround, disable adding request headers based on the downstream request properties, such as downstream certificate properties.
See more information about CVE-2023-27493 from MITRE CVE dictionary and NIST NVD
CVSS v3.0 metrics
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
| Base Score: | 9.1 | Base Metrics: | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| Access Vector: | Network | Attack Complexity: | Low |
| Privileges Required: | None | User Interaction: | None |
| Scope: | Unchanged | Confidentiality Impact: | High |
| Integrity Impact: | High | Availability Impact: | None |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 7 (istio) | ELSA-2023-12355 | 2023-06-02 |
| Oracle Linux version 7 (istio) | ELSA-2023-12357 | 2023-06-02 |
| Oracle Linux version 7 (kubernetes) | ELSA-2023-12355 | 2023-06-02 |
| Oracle Linux version 7 (kubernetes) | ELSA-2023-12357 | 2023-06-02 |
| Oracle Linux version 7 (olcne) | ELSA-2023-12355 | 2023-06-02 |
| Oracle Linux version 7 (olcne) | ELSA-2023-12357 | 2023-06-02 |
| Oracle Linux version 7 (olcne) | ELSA-2023-23649 | 2023-06-02 |
| Oracle Linux version 8 (istio) | ELSA-2023-12354 | 2023-06-02 |
| Oracle Linux version 8 (istio) | ELSA-2023-12356 | 2023-06-02 |
| Oracle Linux version 8 (kubernetes) | ELSA-2023-12354 | 2023-06-02 |
| Oracle Linux version 8 (kubernetes) | ELSA-2023-12356 | 2023-06-02 |
| Oracle Linux version 8 (olcne) | ELSA-2023-12354 | 2023-06-02 |
| Oracle Linux version 8 (olcne) | ELSA-2023-12356 | 2023-06-02 |
| Oracle Linux version 8 (olcne) | ELSA-2023-23648 | 2023-06-02 |
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