Vulnerability in Isc Bind9
CVE-2021-25216
In BIND 9.5.0 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.11.3-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 -> 9.17.1 of the BIND 9.17 development branch, BIND se…
EPSS: 0.277 (96.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Isc Bind9 — versions Open Source Branches 9.5 though 9.11 9.5.0 through versions before 9.11.31, Open Source Branches 9.12 though 9.16 9.12.0 through versions before 9.16.14, Supported Preview Branch 9.11-S 9.11.3-S1 through versions before 9.11.31-S1
Public proof-of-concept exploits
References
- kb.isc.org/v1/docs/cve-2021-25215 (x_refsource_CONFIRM)
- [oss-security] 20210428 ISC discloses three BIND vulnerabilities (CVE-2021-25214, CVE-2021-25215, and CVE-2021-25216) (mailing-list, x_refsource_MLIST)
- [oss-security] 20210429 Re: ISC discloses three BIND vulnerabilities (CVE-2021-25214, CVE-2021-25215, and CVE-2021-25216) (mailing-list, x_refsource_MLIST)
- [oss-security] 20210429 Re: ISC discloses three BIND vulnerabilities (CVE-2021-25214, CVE-2021-25215, and CVE-2021-25216) (mailing-list, x_refsource_MLIST)
- [oss-security] 20210429 Re: ISC discloses three BIND vulnerabilities (CVE-2021-25214, CVE-2021-25215, and CVE-2021-25216) (mailing-list, x_refsource_MLIST)
- DSA-4909 (vendor-advisory, x_refsource_DEBIAN)
- [debian-lts-announce] 20210504 [SECURITY] [DLA 2647-1] bind9 security update (mailing-list, x_refsource_MLIST)
- security.netapp.com/advisory/ntap-20210521-0006/ (x_refsource_CONFIRM)
- www.zerodayinitiative.com/advisories/ZDI-21-657/ (x_refsource_MISC)
- cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2021-25216?
- CVE-2021-25216 is a high-severity vulnerability in Isc Bind9. CVSS score: 8.1/10. Published 2021-04-29.
- How severe is CVE-2021-25216?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2021-25216 known to be exploited?
- 18 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.