OpenSSL backend: X509 peer certificate not freed in ossl_get_channel_binding causes per-request memory leak (DoS risk for long-lived clients)
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原文摘录
摘自原文（3277 字符中的一小部分）
Summary: In curl’s OpenSSL backend, `ossl_get_channel_binding` retains a new reference to the server’s X509 certificate via `SSL_get1_peer_certificate` and never releases it. When Negotiate (SPNEGO) over TLS is in use, this path is invoked and leaks one X509 object per trigger. Over many requests …
原文中的代码
cert = SSL_get1_peer_certificate(octx->ssl);
if(!cert) {
/* No server certificate, don't do channel binding */
return CURLE_OK;
}
if(!OBJ_find_sigid_algs(X509_get_signature_nid(cert), &algo_nid, NULL)) {
failf(data,
"Unable to find digest NID for certificate signature …默认不展示报告全文。以上为简短摘录，完整复现过程请阅读原文。版权归研究员与 curl 所有。
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阅读 HackerOne 原文 ↗作者 @giant_anteater · 版权归作者与 curl 所有