CVE-2021-25214 is a denial-of-service vulnerability affecting multiple versions of ISC BIND 9, including Debian, Fedora, NetApp, and Siemens products. A remote attacker can trigger a named process termination by sending a malformed IXFR to a vulnerable server, leading to a failed assertion upon the next zone refresh. Rated Medium severity (CVSS 6.5), this flaw requires low privileges and network access but no user interaction, resulting in high availability impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 9.8.5, <= 9.8.8CPE matchmatch criteria | cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* | ||
>= 9.9.3, < 9.11.31CPE matchmatch criteria | cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* | ||
>= 9.12.0, < 9.16.15CPE matchmatch criteria | cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* | ||
>= 9.17.0, < 9.17.12CPE matchmatch criteria | cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* | ||
9.9.3CPE matchmatch criteria | cpe:2.3:a:isc:bind:9.9.3:s1:*:*:supported_preview:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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CVE-2021-25214
May 11, 2021bind: Broken inbound incremental zone update (IXFR) can cause named to terminate unexpectedly
Apr 28, 2021A broken inbound incremental zone update (IXFR) can cause named to terminate unexpectedly
Apr 13, 2021