diff options
Diffstat (limited to 'meta/recipes-support/curl/curl/CVE-2020-8286.patch')
| -rw-r--r-- | meta/recipes-support/curl/curl/CVE-2020-8286.patch | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/meta/recipes-support/curl/curl/CVE-2020-8286.patch b/meta/recipes-support/curl/curl/CVE-2020-8286.patch new file mode 100644 index 0000000000..8c75cba844 --- /dev/null +++ b/meta/recipes-support/curl/curl/CVE-2020-8286.patch @@ -0,0 +1,131 @@ +From 5d3b28deac44c19e4d73fc80e4917d42ee43adfe Mon Sep 17 00:00:00 2001 +From: Daniel Stenberg <daniel@haxx.se> +Date: Wed, 2 Dec 2020 23:01:11 +0100 +Subject: [PATCH] openssl: make the OCSP verification verify the certificate id + +CVE-2020-8286 + +Reported by anonymous + +Bug: https://curl.se/docs/CVE-2020-8286.html + +Upstream-Status: Backport [https://github.com/curl/curl/commit/d9d01672785b] + +CVE: CVE-2020-8286 + +Signed-off-by: Daniel Stenberg <daniel@haxx.se> +Signed-off-by: Khairul Rohaizzat Jamaluddin <khairul.rohaizzat.jamaluddin@intel.com> + +--- + lib/vtls/openssl.c | 83 +++++++++++++++++++++++++++++++++++------------------- + 1 file changed, 54 insertions(+), 29 deletions(-) + +diff --git a/lib/vtls/openssl.c b/lib/vtls/openssl.c +index 1685a4a..22cbfe7 100644 +--- a/lib/vtls/openssl.c ++++ b/lib/vtls/openssl.c +@@ -1777,6 +1777,11 @@ static CURLcode verifystatus(struct connectdata *conn, + X509_STORE *st = NULL; + STACK_OF(X509) *ch = NULL; + struct ssl_backend_data *backend = connssl->backend; ++ X509 *cert; ++ OCSP_CERTID *id = NULL; ++ int cert_status, crl_reason; ++ ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd; ++ int ret; + + long len = SSL_get_tlsext_status_ocsp_resp(backend->handle, &status); + +@@ -1845,43 +1850,63 @@ static CURLcode verifystatus(struct connectdata *conn, + goto end; + } + +- for(i = 0; i < OCSP_resp_count(br); i++) { +- int cert_status, crl_reason; +- OCSP_SINGLERESP *single = NULL; +- +- ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd; ++ /* Compute the certificate's ID */ ++ cert = SSL_get_peer_certificate(backend->handle); ++ if(!cert) { ++ failf(data, "Error getting peer certficate"); ++ result = CURLE_SSL_INVALIDCERTSTATUS; ++ goto end; ++ } + +- single = OCSP_resp_get0(br, i); +- if(!single) +- continue; ++ for(i = 0; i < sk_X509_num(ch); i++) { ++ X509 *issuer = sk_X509_value(ch, i); ++ if(X509_check_issued(issuer, cert) == X509_V_OK) { ++ id = OCSP_cert_to_id(EVP_sha1(), cert, issuer); ++ break; ++ } ++ } ++ X509_free(cert); + +- cert_status = OCSP_single_get0_status(single, &crl_reason, &rev, +- &thisupd, &nextupd); ++ if(!id) { ++ failf(data, "Error computing OCSP ID"); ++ result = CURLE_SSL_INVALIDCERTSTATUS; ++ goto end; ++ } + +- if(!OCSP_check_validity(thisupd, nextupd, 300L, -1L)) { +- failf(data, "OCSP response has expired"); +- result = CURLE_SSL_INVALIDCERTSTATUS; +- goto end; +- } ++ /* Find the single OCSP response corresponding to the certificate ID */ ++ ret = OCSP_resp_find_status(br, id, &cert_status, &crl_reason, &rev, ++ &thisupd, &nextupd); ++ OCSP_CERTID_free(id); ++ if(ret != 1) { ++ failf(data, "Could not find certificate ID in OCSP response"); ++ result = CURLE_SSL_INVALIDCERTSTATUS; ++ goto end; ++ } + +- infof(data, "SSL certificate status: %s (%d)\n", +- OCSP_cert_status_str(cert_status), cert_status); ++ /* Validate the corresponding single OCSP response */ ++ if(!OCSP_check_validity(thisupd, nextupd, 300L, -1L)) { ++ failf(data, "OCSP response has expired"); ++ result = CURLE_SSL_INVALIDCERTSTATUS; ++ goto end; ++ } + +- switch(cert_status) { +- case V_OCSP_CERTSTATUS_GOOD: +- break; ++ infof(data, "SSL certificate status: %s (%d)\n", ++ OCSP_cert_status_str(cert_status), cert_status); + +- case V_OCSP_CERTSTATUS_REVOKED: +- result = CURLE_SSL_INVALIDCERTSTATUS; ++ switch(cert_status) { ++ case V_OCSP_CERTSTATUS_GOOD: ++ break; + +- failf(data, "SSL certificate revocation reason: %s (%d)", +- OCSP_crl_reason_str(crl_reason), crl_reason); +- goto end; ++ case V_OCSP_CERTSTATUS_REVOKED: ++ result = CURLE_SSL_INVALIDCERTSTATUS; ++ failf(data, "SSL certificate revocation reason: %s (%d)", ++ OCSP_crl_reason_str(crl_reason), crl_reason); ++ goto end; + +- case V_OCSP_CERTSTATUS_UNKNOWN: +- result = CURLE_SSL_INVALIDCERTSTATUS; +- goto end; +- } ++ case V_OCSP_CERTSTATUS_UNKNOWN: ++ default: ++ result = CURLE_SSL_INVALIDCERTSTATUS; ++ goto end; + } + + end: |