VulnerabilityModified

CVE-2021-25215

HIGH 7.5EPSS 11.8%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 11.8%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.

Description

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.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 11.79% probability · 96th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-617
Affected: debian/debian linux · isc/bind · fedoraproject/fedora · netapp/active iq unified manager · netapp/cloud backup · netapp/h300s firmware · netapp/h500s firmware · netapp/h700s firmware · netapp/h300e firmware · netapp/h500e firmware · netapp/h700e firmware · netapp/h410s firmware · netapp/a250 firmware · netapp/500f firmware · oracle/tekelec platform distribution · siemens/sinec infrastructure network services
Source: security-officer@isc.org

EPSS trend

EPSS 11.8% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

http://www.openwall.com/lists/oss-security/2021/04/29/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/04/29/2Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/04/29/3Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/04/29/4Mailing List, Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
https://kb.isc.org/v1/docs/cve-2021-25215Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/05/msg00001.htmlMailing 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-4909Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/04/29/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/04/29/2Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/04/29/3Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/04/29/4Mailing List, Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
https://kb.isc.org/v1/docs/cve-2021-25215Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/05/msg00001.htmlMailing 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-4909Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.