GHSA-455w-c45v-86rg

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GHSA-455w-c45v-86rg

Summary: fastify vulnerable to denial of service via malicious Content-Type

Details: ### Impact An attacker can send an invalid `Content-Type` header that can cause the application to crash, leading to a possible Denial of Service attack. Only the v4.x line is affected. (This was updated: upon a close inspection, v3.x is not affected after all). ### Patches Yes, update to `> v4.8.0`. ### Workarounds You can reject the malicious content types before the body parser enters in action. ```js const badNames = Object.getOwnPropertyNames({}.__proto__) fastify.addHook('onRequest', async (req, reply) => { for (const badName of badNames) { if (req.headers['content-type'].indexOf(badName) > -1) { reply.code(415) throw new Error('Content type not supported') } } }) ``` ### References See the HackerOne report [#1715536](https://hackerone.com/bugs?report_id=1715536&subject=fastify) ### For more information [Fastify security policy](https://github.com/fastify/fastify/security/policy)

References: https://github.com/fastify/fastify/security/advisories/GHSA-455w-c45v-86rg, https://nvd.nist.gov/vuln/detail/CVE-2022-39288, https://github.com/fastify/fastify/commit/fbb07e8dfad74c69cd4cd2211aedab87194618e3, https://github.com/fastify/fastify, https://github.com/fastify/fastify/security/policy, https://hackerone.com/bugs?report_id=1715536&subject=fastify