CVE-2021-25215 | An assertion check can fail while answering queries for DNAME records that require the DNAME to be processed to resolve itself

In BIND 9.0.0 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.9.3-S1 -> 9.11.29-S1 and 9.16.8-S1 -> 9.16.13-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.11 of the BIND 9.17 development branch, when a vulnerable version of named receives a query for a record triggering the flaw described above, the named process will terminate due to a failed assertion check. The vulnerability affects all currently maintained BIND 9 branches (9.11, 9.11-S, 9.16, 9.16-S, 9.17) as well as all other versions of BIND 9.

公開: 2021-04-28 最後更新: 2026-06-16 指派方: [email protected] 來源: [email protected]

結論預警: CVE-2021-25215 綜合評估為中等風險(63.3/100):CVSS 技術影響為高級,利用機率偏高(EPSS 11.30%,百分位 95%) 核心證據: EPSS 顯示該漏洞近期被利用的可能性處於高位。 強制指令: 被利用機率偏高—請盤點暴露面並優先安排修補。

風險隨態勢動態變化;本站持續評估並同步更新本頁展示內容。

CVE-2021-25215 的 EPSS(利用預測評分)

EPSS 日更估計相對被利用可能性;百分位表示該 CVE 在已評分漏洞中的相對排名(越高表示相對更嚴重)。

# 日期 舊 EPSS 分數 新 EPSS 分數 變化(新 − 舊)
1 2026-06-19 11.39% 11.30% -0.09%
2 2026-06-15 2.25% 11.39% +9.14%
3 2026-06-08 2.25%

完整 EPSS 歷史 (共 47 筆)

CVE-2021-25215 的 CVSS 指標

該 CVE 的 CVSS 指標。

底座分 版本 嚴重度 向量 可利用性 影響 分數來源
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 點擊展開
攻擊向量 (AV:N)
可經網際網路或企業內可路由網段從遠端觸達,攻擊者不必在裝置旁邊。
攻擊複雜度 (AC:L)
前置條件清楚,成功路徑穩定,不必仰賴罕見競態或極端環境。
權限需求 (PR:N)
不必事先登入或提權,匿名工作階段也可能成為跳板。
使用者互動 (UI:N)
不必受害者點連結、放行巨集或安裝軟體,攻擊鏈可自動走完。
作用域 (S:U)
破壞局限在脆弱元件原本的安全權限與信任域之內。
機密性影響 (C:N)
幾乎談不上實質的敏感資料外洩。
完整性影響 (I:N)
對紀錄真實性與不可否認性的破壞可忽略。
可用性影響 (A:H)
可造成長時間中斷、關鍵交易無法完成,或伴隨資料毀損導致難以自癒。
3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 點擊展開
攻擊向量 (AV:N)
可經網際網路或企業內可路由網段從遠端觸達,攻擊者不必在裝置旁邊。
攻擊複雜度 (AC:L)
前置條件清楚,成功路徑穩定,不必仰賴罕見競態或極端環境。
權限需求 (PR:N)
不必事先登入或提權,匿名工作階段也可能成為跳板。
使用者互動 (UI:N)
不必受害者點連結、放行巨集或安裝軟體,攻擊鏈可自動走完。
作用域 (S:U)
破壞局限在脆弱元件原本的安全權限與信任域之內。
機密性影響 (C:N)
幾乎談不上實質的敏感資料外洩。
完整性影響 (I:N)
對紀錄真實性與不可否認性的破壞可忽略。
可用性影響 (A:H)
可造成長時間中斷、關鍵交易無法完成,或伴隨資料毀損導致難以自癒。
3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P 點擊展開
存取路徑 (AV:N)
只要路由可達,即可從遠端發動利用。
存取複雜度 (AC:L)
步驟短、路徑清楚,重現成本低。
認證 (AU:N)
全程無需有效身分。
機密性影響 (C:N)
對機密性無影響。
完整性影響 (I:N)
對完整性無影響。
可用性影響 (A:P)
可用性受到部分損害。
10.0 2.9 [email protected]

CVE-2021-25215 的弱點列舉

CVE-2021-25215 的 OS 追蹤

vendor priority summary link
alpine high CVE-2021-25215: 1 source package rows (bind); 10 state rows across 10 repos (3.10-main, 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 10, open 0. https://security.alpinelinux.org/vuln/CVE-2021-25215
debian not yet assigned CVE-2021-25215 not yet assigned priority: Debian including 1 source packages (bind9), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2021-25215
redhat high https://access.redhat.com/security/cve/CVE-2021-25215
suse high CVE-2021-25215 severity important: SUSE including 379 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, …), 1261 product×package rows across 109 product lines (HPE Helion OpenStack 8, Image SLES12-SP5-Azure-BYOS, … (109 product lines)): Fixed 1122, Known Affected 137, Known Not Affected 2. https://www.suse.com/security/cve/CVE-2021-25215/
ubuntu medium CVE-2021-25215 medium priority: Ubuntu including 1 source packages (bind9), 15 status rows across 15 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, trusty, upstream, xenial): released 15. https://ubuntu.com/security/CVE-2021-25215

CVE-2021-25215 的影響軟體 / 設定

廠商 產品 版本 原始 CPE
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
isc bind >= 9.0.0, < 9.11.31 cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*
isc bind >= 9.12.0, < 9.16.15 cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*
isc bind >= 9.17.0, < 9.17.12 cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*
isc bind 9.9.3 cpe:2.3:a:isc:bind:9.9.3:s1:*:*:supported_preview:*:*:*
isc bind 9.9.12 cpe:2.3:a:isc:bind:9.9.12:s1:*:*:supported_preview:*:*:*
isc bind 9.9.13 cpe:2.3:a:isc:bind:9.9.13:s1:*:*:supported_preview:*:*:*
isc bind 9.10.5 cpe:2.3:a:isc:bind:9.10.5:s1:*:*:supported_preview:*:*:*
isc bind 9.10.7 cpe:2.3:a:isc:bind:9.10.7:s1:*:*:supported_preview:*:*:*
isc bind 9.11.3 cpe:2.3:a:isc:bind:9.11.3:s1:*:*:supported_preview:*:*:*
isc bind 9.11.5 cpe:2.3:a:isc:bind:9.11.5:s3:*:*:supported_preview:*:*:*
isc bind 9.11.5 cpe:2.3:a:isc:bind:9.11.5:s5:*:*:supported_preview:*:*:*
isc bind 9.11.5 cpe:2.3:a:isc:bind:9.11.5:s6:*:*:supported_preview:*:*:*
isc bind 9.11.6 cpe:2.3:a:isc:bind:9.11.6:s1:*:*:supported_preview:*:*:*
isc bind 9.11.7 cpe:2.3:a:isc:bind:9.11.7:s1:*:*:supported_preview:*:*:*
isc bind 9.11.8 cpe:2.3:a:isc:bind:9.11.8:s1:*:*:supported_preview:*:*:*
isc bind 9.11.12 cpe:2.3:a:isc:bind:9.11.12:s1:*:*:supported_preview:*:*:*
isc bind 9.11.21 cpe:2.3:a:isc:bind:9.11.21:s1:*:*:supported_preview:*:*:*
isc bind 9.11.27 cpe:2.3:a:isc:bind:9.11.27:s1:*:*:supported_preview:*:*:*
isc bind 9.11.29 cpe:2.3:a:isc:bind:9.11.29:s1:*:*:supported_preview:*:*:*
isc bind 9.16.8 cpe:2.3:a:isc:bind:9.16.8:s1:*:*:supported_preview:*:*:*
isc bind 9.16.11 cpe:2.3:a:isc:bind:9.16.11:s1:*:*:supported_preview:*:*:*
isc bind 9.16.13 cpe:2.3:a:isc:bind:9.16.13:s1:*:*:supported_preview:*:*:*
fedoraproject fedora 33 cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
fedoraproject fedora 34 cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
netapp active_iq_unified_manager cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
netapp cloud_backup cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
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 a250_firmware cpe:2.3:o:netapp:a250_firmware:-:*:*:*:*:*:*:*
netapp 500f_firmware cpe:2.3:o:netapp:500f_firmware:-:*:*:*:*:*:*:*
oracle tekelec_platform_distribution >= 7.4.0, <= 7.7.1 cpe:2.3:a:oracle:tekelec_platform_distribution:*:*:*:*:*:*:*:*
siemens sinec_infrastructure_network_services < 1.0.1.1 cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*

CVE-2021-25215 的參考連結

URL 標籤
http://www.openwall.com/lists/oss-security/2021/04/29/1 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/04/29/2 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/04/29/3 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/04/29/4 Mailing List Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf Patch Third Party Advisory
https://kb.isc.org/v1/docs/cve-2021-25215 Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/05/msg00001.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VEC2XG4Q2ODTN2C4CGXEIXU3EUTBMK7L/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZDSRPCJQ7MZC6CENH5PO3VQOFI7VSWBE/
https://security.netapp.com/advisory/ntap-20210521-0006/ Third Party Advisory
https://www.debian.org/security/2021/dsa-4909 Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html Patch Third Party Advisory
cvelogic Threat Intelligence