CVE-2026-55162— Netflix Lemur 服务端请求伪造漏洞

Lemur: Post-authentication SSRF via certificate verification - attacker-controlled CRL and OCSP URLs in uploaded certificates

Lemur manages TLS certificate creation. Prior to 1.9.2, lemur/certificates/verify.py accepted CRL Distribution Point and OCSP responder URLs from uploaded certificate extensions and used them in crl_verify and ocsp_verify without adequate destination validation. An authenticated operator could submit a certificate through POST /api/1/certificates/upload and cause verify_string to reach loopback, RFC1918, link-local, or instance-metadata destinations such as 169.254.169.254. The requests could probe internal services and create side effects from the Lemur host network position. The CRL path also used an unbounded cache, allowing attacker-controlled entries to persist and consume memory. The fix validates destinations, supports explicit trusted-host allowlists, and bounds the CRL cache. This issue is fixed in version 1.9.2.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

服务端请求伪造(SSRF)

Netflix Lemur 服务端请求伪造漏洞

Netflix lemur是美国Netflix公司开源的一个证书管理工具。 Netflix Lemur 1.9.2之前版本存在服务端请求伪造漏洞，该漏洞源于对CRL分发点和OCSP响应程序URL的目标验证不足，可能导致服务端请求伪造，访问回环地址、内网地址、链路本地地址或实例元数据地址，并导致内存消耗。

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