CVE-2023-27496
Envoy may crash when a redirect url without a state param is received in the oauth filter
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
1Exploited in Wild
-Decision
Descriptions
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, the OAuth filter assumes that a `state` query param is present on any response that looks like an OAuth redirect response. Sending it a request with the URI path equivalent to the redirect path, without the `state` parameter, will lead to abnormal termination of Envoy process. Versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9 contain a patch. The issue can also be mitigated by locking down OAuth traffic, disabling the filter, or by filtering traffic before it reaches the OAuth filter (e.g. via a lua script).
A flaw was found in Envoy. If Envoy is running with the OAuth filter enabled, a malicious actor could construct a request which would cause denial of service, crashing Envoy.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2023-03-01 CVE Reserved
- 2023-04-04 CVE Published
- 2024-08-02 CVE Updated
- 2024-08-02 First Exploit
- 2024-09-14 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-20: Improper Input Validation
CAPEC
References (3)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|---|---|
| https://github.com/envoyproxy/envoy/security/advisories/GHSA-j79q-2g66-2xv5 | 2024-08-02 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2023-27496 | 2023-08-11 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2182155 | 2023-08-11 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Envoyproxy Search vendor "Envoyproxy" | Envoy Search vendor "Envoyproxy" for product "Envoy" | < 1.22.9 Search vendor "Envoyproxy" for product "Envoy" and version " < 1.22.9" | - |
Affected
| ||||||
| Envoyproxy Search vendor "Envoyproxy" | Envoy Search vendor "Envoyproxy" for product "Envoy" | >= 1.23.0 < 1.23.6 Search vendor "Envoyproxy" for product "Envoy" and version " >= 1.23.0 < 1.23.6" | - |
Affected
| ||||||
| Envoyproxy Search vendor "Envoyproxy" | Envoy Search vendor "Envoyproxy" for product "Envoy" | >= 1.24.0 < 1.24.4 Search vendor "Envoyproxy" for product "Envoy" and version " >= 1.24.0 < 1.24.4" | - |
Affected
| ||||||
| Envoyproxy Search vendor "Envoyproxy" | Envoy Search vendor "Envoyproxy" for product "Envoy" | >= 1.25.0 < 1.25.3 Search vendor "Envoyproxy" for product "Envoy" and version " >= 1.25.0 < 1.25.3" | - |
Affected
| ||||||