curl 7.61.0 through 7.76.1 suffers from exposure of data element to wrong session due to a mistake in the code for CURLOPT_SSL_CIPHER_LIST when libcurl is built to use the Schannel TLS library. The selected cipher set was stored in a single "static" variable in the library, which has the surprising side-effect that if an application sets up multiple concurrent transfers, the last one that sets the ciphers will accidentally control the set used by all transfers. In a worst-case scenario, this weakens transport security significantly.
総合評価: CVE-2021-22897 は悪用リスクが高い(68.3/100)。CVSS 深刻度は中。悪用される可能性が高い(EPSS 2.98%、85 パーセンタイル) 根拠: 公開エクスプロイトが 1 件参照されています(Exploit-DB)。 直近 1 日で EPSS が +2.19% 上昇。悪用への関心が高まっている可能性があります。 推奨対応: 公開エクスプロイトが確認されています。影響範囲の確認、緩和策の適用、パッチ適用を優先してください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
| EDB-ID | ソース | 種別 | 公開 | リンク |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置(高いほど相対的に深刻)を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ(新 − 旧) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.79% | 2.98% | +2.19% |
| 2 | 2026-03-21 | 1.12% | 0.79% | -0.33% |
| 3 | 2026-03-20 | — | 1.12% | — |
EPSS の全履歴 (全 50 件)
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 5.3 | 3.1 | MEDIUM |
|
3.9 | 1.4 | [email protected] |
| 5.3 | 3.1 | MEDIUM |
|
3.9 | 1.4 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2021-22897: 1 source package rows (curl); 51 state rows across 5 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 51, open 0. | https://security.alpinelinux.org/vuln/CVE-2021-22897 |
debian
|
unimportant | CVE-2021-22897 unimportant priority: Debian including 1 source packages (curl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2021-22897 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2021-22897 |
ubuntu
|
negligible | CVE-2021-22897 negligible priority: Ubuntu including 1 source packages (curl), 9 status rows across 9 suites (bionic, focal, groovy, hirsute, impish, jammy, trusty, upstream, xenial): not-affected 8, released 1. | https://ubuntu.com/security/CVE-2021-22897 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| haxx | curl | >= 7.61.0, <= 7.76.1 | cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* |
| oracle | communications_cloud_native_core_binding_support_function | 1.11.0 | cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:*:*:*:*:*:*:* |
| oracle | communications_cloud_native_core_network_function_cloud_native_environment | 1.10.0 | cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:* |
| oracle | communications_cloud_native_core_network_repository_function | 1.15.0 | cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.0:*:*:*:*:*:*:* |
| oracle | communications_cloud_native_core_network_repository_function | 1.15.1 | cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.1:*:*:*:*:*:*:* |
| oracle | communications_cloud_native_core_network_slice_selection_function | 1.8.0 | cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.8.0:*:*:*:*:*:*:* |
| oracle | communications_cloud_native_core_service_communication_proxy | 1.15.0 | cpe:2.3:a:oracle:communications_cloud_native_core_service_communication_proxy:1.15.0:*:*:*:*:*:*:* |
| oracle | essbase | < 11.1.2.4.047 | cpe:2.3:a:oracle:essbase:*:*:*:*:*:*:*:* |
| oracle | essbase | >= 21.0, < 21.3 | cpe:2.3:a:oracle:essbase:*:*:*:*:*:*:*:* |
| oracle | mysql_server | <= 5.7.34 | cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* |
| oracle | mysql_server | >= 8.0.0, <= 8.0.25 | cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* |
| netapp | cloud_backup | — | cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* |
| netapp | solidfire\,_enterprise_sds_\&_hci_storage_node | — | cpe:2.3:a:netapp:solidfire\,_enterprise_sds_\&_hci_storage_node:-:*:*:*:*:*:*:* |
| netapp | solidfire_\&_hci_management_node | — | cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:* |
| netapp | solidfire_baseboard_management_controller_firmware | — | cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:* |
| netapp | hci_compute_node_firmware | — | cpe:2.3:o:netapp:hci_compute_node_firmware:-:*:*:*:*:*:*:* |
| netapp | h300e_firmware | — | cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:* |
| netapp | h300s_firmware | — | cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* |
| netapp | h410s_firmware | — | cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* |
| netapp | h500e_firmware | — | cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:* |
| netapp | h500s_firmware | — | cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* |
| netapp | h700e_firmware | — | cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:* |
| netapp | h700s_firmware | — | cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* |
| siemens | sinec_infrastructure_network_services | < 1.0.1.1 | cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:* |
| splunk | universal_forwarder | >= 8.2.0, < 8.2.12 | cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:* |
| splunk | universal_forwarder | >= 9.0.0, < 9.0.6 | cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:* |
| splunk | universal_forwarder | 9.1.0 | cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf | Patch Third Party Advisory |
| https://curl.se/docs/CVE-2021-22897.html | Patch Vendor Advisory |
| https://github.com/curl/curl/commit/bbb71507b7bab52002f9b1e0880bed6a32834511 | Patch Third Party Advisory |
| https://hackerone.com/reports/1172857 | Exploit Issue Tracking Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20210727-0007/ | Third Party Advisory |
| https://www.oracle.com//security-alerts/cpujul2021.html | Patch Third Party Advisory |
| https://www.oracle.com/security-alerts/cpuapr2022.html | Patch Third Party Advisory |
| https://www.oracle.com/security-alerts/cpujan2022.html | Patch Third Party Advisory |