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Security Advisories: GSA_kwCzR0hTQS1ocTh3LTl3OHctcG14N84AA1vi
WireMock Controlled Server Side Request Forgery vulnerability through URL
Impact
WireMock can be configured to only permit proxying (and therefore recording) to certain addresses. This is achieved via a list of allowed address rules and a list of denied address rules, where the allowed list is evaluated first. Documentation.
Until WireMock Webhooks Extension 3.0.0-beta-15, the filtering of target addresses from the proxy mode DID NOT work for Webhooks, so the users were potentially vulnerable regardless of the limitProxyTargets
settings.
Via the WireMock webhooks configuration, POST requests from a webhook might be forwarded to an arbitrary service reachable from WireMock’s instance. For example, If someone is running the WireMock docker Container inside a private cluster, they can trigger internal POST requests against unsecured APIs or even against secure ones by passing a token, discovered using another exploit, via authentication headers.
Affected components
- WireMock Webhooks Extension 2.x versions until 2.35.1 (security patch)
- WireMock 3.x version until 3.0.3 (security patch)
- All versions of WireMock Studio (discontinued). This distribution bundles the WireMock Webhooks Extension and activates it by default
Patches and Mitigation
- For WireMock 2.x and 3.x - upgrade to the versions with the security patches
- Setup network restrictions similarly to https://wiremock.org/docs/configuration/#preventing-proxying-to-and-recording-from-specific-target-addresses
- For WireMock Studio: Stop using discontinued WireMock Studio, migrate to other distributions. The vendor of WireMock Studio recommends migration to WireMock Cloud
NOTE: It was confirmed that WireMock Cloud does not expose sensitive internal APIs and hence not vulnerable to the issue. No action is needed if you use this SaaS distribution.
Workarounds
- Use external firewall rules to define the list of permitted destinations
References
Credits
- @W0rty for reporting CVE-2023-39967 in WireMock Studio
- WireMock Inc. team for discovering similar exploits in Webhooks and the risk in the Proxy mode defaults for WireMock
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1ocTh3LTl3OHctcG14N84AA1vi
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 8 months ago
Updated: 6 months ago
CVSS Score: 4.6
CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
Identifiers: GHSA-hq8w-9w8w-pmx7, CVE-2023-41327
References:
- https://github.com/wiremock/wiremock/security/advisories/GHSA-hq8w-9w8w-pmx7
- https://github.com/wiremock/wiremock/releases/tag/2.35.1
- https://github.com/wiremock/wiremock/releases/tag/3.0.3
- https://nvd.nist.gov/vuln/detail/CVE-2023-41327
- https://github.com/wiremock/wiremock/releases/tag/3.0.0-beta-15
- https://wiremock.org/docs/configuration/#preventing-proxying-to-and-recording-from-specific-target-addresses
- https://github.com/advisories/GHSA-hq8w-9w8w-pmx7
Blast Radius: 2.8
Affected Packages
maven:org.wiremock:wiremock-webhooks-extension
Dependent packages: 0Dependent repositories: 4
Downloads:
Affected Version Ranges: >= 2.0.0, < 2.35.1, >= 3.0.0, < 3.0.3
Fixed in: 2.35.1, 3.0.3
All affected versions: 2.30.0, 2.30.1, 2.31.0, 2.32.0, 2.33.0, 2.33.1, 2.33.2, 2.34.0, 2.35.0, 3.0.0, 3.0.1, 3.0.2
All unaffected versions: 0.0.1, 1.0.0, 2.35.1, 2.35.2, 3.0.3, 3.0.4