CVE-2021-25214

CWE-617 — Reachable Assertion9 documents8 sources
Severity
6.5MEDIUM
EPSS
0.8%
top 26.82%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
ISC BindSiemens Sinec Infrastructure Network ServicesISC Bind9+2 more
Timeline
PublishedApr 29
Latest updateSep 8

Description

In BIND 9.8.5 -> 9.8.8, 9.9.3 -> 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 9 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 malformed IXFR triggering the flaw described above, the named process will terminate due to a failed assertion the next time the transferred secondary zone is refreshed.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages5 packages

▶NVDisc/bind9.9.3 — 9.11.31+20
▶Debianbind9< 1:9.16.15-1+3
▶Ubuntubind9< 1:9.10.3.dfsg.P4-8ubuntu1.19+2
▶CVEListV5isc/bind96 versions+5

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

Patches

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

🔴Vulnerability Details

4
GHSA
GHSA-pqmv-mqwc-wmr3: In BIND 9↗2022-05-24
▶
OSV
bind9 vulnerabilities↗2021-04-29
▶
CVEList
A broken inbound incremental zone update (IXFR) can cause named to terminate unexpectedly↗2021-04-29
▶
OSV
CVE-2021-25214: In BIND 9↗2021-04-29
▶

📋Vendor Advisories

4
Ubuntu
Bind vulnerabilities↗2025-09-08
▶
Red Hat
bind: Broken inbound incremental zone update (IXFR) can cause named to terminate unexpectedly↗2021-04-28
▶
Microsoft
A broken inbound incremental zone update (IXFR) can cause named to terminate unexpectedly↗2021-04-13
▶
Debian
CVE-2021-25214: bind9 - In BIND 9.8.5 -> 9.8.8, 9.9.3 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9...↗2021
▶
CVE-2021-25214 (MEDIUM CVSS 6.5) | In BIND 9.8.5 -> 9.8.8 | cvebase.io