When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it *again*.
総合評価: CVE-2021-22945 は悪用リスクが高い(88.8/100)。CVSS 深刻度は重大。悪用される可能性が高い(EPSS 6.22%、93 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 +5.86% 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 | 0.35% | 6.22% | +5.86% |
| 2 | 2026-03-04 | 0.26% | 0.35% | +0.10% |
| 3 | 2026-03-01 | — | 0.26% | — |
EPSS の全履歴 (全 59 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 |
|---|---|---|---|---|---|---|
| 9.1 | 3.1 | CRITICAL |
|
3.9 | 5.2 | [email protected] |
| 9.1 | 3.1 | CRITICAL |
|
3.9 | 5.2 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| 5.8 | 2.0 | MEDIUM |
|
8.6 | 4.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2021-22945: 1 source package rows (curl); 9 state rows across 9 repos (3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 9, open 0. | https://security.alpinelinux.org/vuln/CVE-2021-22945 |
debian
|
not yet assigned | CVE-2021-22945 not yet assigned 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-2021-22945 |
gentoo
|
high | CVE-2021-22945: 1 GLSA(s) (202212-01), 1 atom(s) (net-misc/curl); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2021-22945 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2021-22945 |
suse
|
medium | CVE-2021-22945 severity moderate: SUSE including 272 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 355 product×package rows across 45 product lines (HPE Helion OpenStack 8, SUSE CaaS Platform 4.0, … (45 product lines)): Known Affected 231, Known Not Affected 84, Fixed 40. | https://www.suse.com/security/cve/CVE-2021-22945/ |
ubuntu
|
medium | CVE-2021-22945 medium priority: Ubuntu including 1 source packages (curl), 8 status rows across 8 suites (bionic, focal, hirsute, impish, jammy, trusty, upstream, xenial): not-affected 4, released 4. | https://ubuntu.com/security/CVE-2021-22945 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| haxx | libcurl | >= 7.73.0, <= 7.78.0 | cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:* |
| fedoraproject | fedora | 33 | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* |
| fedoraproject | fedora | 35 | cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* |
| netapp | cloud_backup | — | cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* |
| netapp | clustered_data_ontap | — | cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* |
| oracle | mysql_server | >= 5.7.0, <= 5.7.35 | cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* |
| oracle | mysql_server | >= 8.0.0, <= 8.0.26 | cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* |
| netapp | h300s_firmware | — | cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* |
| netapp | h500s_firmware | — | cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* |
| netapp | h700s_firmware | — | cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* |
| netapp | h300e_firmware | — | cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:* |
| netapp | h500e_firmware | — | cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:* |
| netapp | h700e_firmware | — | cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:* |
| netapp | h410s_firmware | — | cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* |
| netapp | solidfire_baseboard_management_controller_firmware | — | cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:* |
| apple | macos | >= 12.0.0, < 12.3 | cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* |
| siemens | sinec_ins | < 1.0.1.1 | cpe:2.3:a:siemens:sinec_ins:*:*:*:*:*:*:*:* |
| debian | debian_linux | 11.0 | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* |
| 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 |
|---|---|
| http://seclists.org/fulldisclosure/2022/Mar/29 | Mailing List Third Party Advisory |
| https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf | Patch Third Party Advisory |
| https://hackerone.com/reports/1269242 | Exploit Patch Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/ | Mailing List Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/ | Mailing List Third Party Advisory |
| https://security.gentoo.org/glsa/202212-01 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20211029-0003/ | Third Party Advisory |
| https://support.apple.com/kb/HT213183 | Third Party Advisory |
| https://www.debian.org/security/2022/dsa-5197 | Third Party Advisory |
| https://www.oracle.com/security-alerts/cpuoct2021.html | Patch Third Party Advisory |