CVE-2021-25215

CWE-617 — Reachable Assertion10 documents9 sources
Severity
7.5HIGH
EPSS
1.5%
top 18.93%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
6
ISC BindSiemens Sinec Infrastructure Network ServicesOracle Tekelec Platform Distribution+3 more
Timeline
PublishedApr 29
Latest updateSep 8

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…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages6 packages

▶NVDisc/bind9.0.0 — 9.11.31+19
▶Debianbind9< 1:9.16.15-1+3
▶Ubuntubind9< 1:9.10.3.dfsg.P4-8ubuntu1.19+2
▶CVEListV5isc/bind95 versions+4

Also affects: Debian Linux 10.0, 9.0, Fedora 33, 34

Patches

Patch: cert-portal.siemens.com ↗Patch: www.oracle.com ↗Patch: cert-portal.siemens.com ↗

🔴Vulnerability Details

4
GHSA
GHSA-r4mp-379r-9756: In BIND 9↗2022-05-24
▶
OSV
bind9 vulnerabilities↗2021-04-29
▶
OSV
CVE-2021-25215: In BIND 9↗2021-04-29
▶
CVEList
An assertion check can fail while answering queries for DNAME records that require the DNAME to be processed to resolve itself↗2021-04-29
▶

📋Vendor Advisories

5
Ubuntu
Bind vulnerabilities↗2025-09-08
▶
Oracle
Oracle Oracle Communications Risk Matrix: Storage Management (BIND) — CVE-2021-25215↗2021-10-15
▶
Red Hat
bind: An assertion check can fail while answering queries for DNAME records that require the DNAME to be processed to resolve itself↗2021-04-28
▶
Microsoft
An assertion check can fail while answering queries for DNAME records that require the DNAME to be processed to resolve itself↗2021-04-13
▶
Debian
CVE-2021-25215: bind9 - In BIND 9.0.0 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.9.3-S1 -> 9.11....↗2021
▶
CVE-2021-25215 (HIGH CVSS 7.5) | In BIND 9.0.0 -> 9.11.29 | cvebase.io