GHSA-hq8w-9w8w-pmx7 WireMock Controlled Server Side Request Forgery vulnerability through URL

• Maven org.wiremock:wiremock-webhooks-extension: >= 3.0.0, < 3.0.3 → fixed in 3.0.3 • Maven org.wiremock:wiremock-webhooks-extension: >= 2.0.0, < 2.35.1 → fixed in 2.35.1

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 • CVE-2023-39967 • Preventing proxying to and recording from specific target addresses 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