CVE-2021-25218 A too-strict assertion check could be triggered when responses in BIND 9.16.19 and 9.17.16 require UDP fragmentation if RRL is in use
HighCVSS 7.5
EPSS 3.7%
- Published
- Updated
- Exploit status
- No public exploit known
Description
In BIND 9.16.19, 9.17.16. Also, version 9.16.19-S1 of BIND Supported Preview Edition When a vulnerable version of named receives a query under the circumstances described above, the named process will terminate due to a failed assertion check. The vulnerability affects only BIND 9 releases 9.16.19, 9.17.16, and release 9.16.19-S1 of the BIND Supported Preview Edition.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| isc bind | = 9.16.19 | No fix listed |
| isc bind | = 9.17.16 | No fix listed |
| isc bind | = 9.17.16-s1 | No fix listed |
| fedoraproject fedora | = 34 | No fix listed |
| alpine/bind(Alpine:v3.11) | < 9.16.20-r0 | 9.16.20-r0 |
| alpine/bind(Alpine:v3.12) | < 9.16.20-r0 | 9.16.20-r0 |
| alpine/bind(Alpine:v3.13) | < 9.16.20-r0 | 9.16.20-r0 |
| alpine/bind(Alpine:v3.14) | < 9.16.20-r0 | 9.16.20-r0 |
| alpine/bind(Alpine:v3.15) | < 9.16.20-r0 | 9.16.20-r0 |
| alpine/bind(Alpine:v3.16) | < 9.16.20-r0 | 9.16.20-r0 |
| alpine/bind(Alpine:v3.17) | < 9.16.20-r0 | 9.16.20-r0 |
| alpine/bind(Alpine:v3.18) | < 9.16.20-r0 | 9.16.20-r0 |
| alpine/bind(Alpine:v3.19) | < 9.16.20-r0 | 9.16.20-r0 |
| alpine/bind(Alpine:v3.20) | < 9.16.20-r0 | 9.16.20-r0 |
| alpine/bind(Alpine:v3.21) | < 9.16.20-r0 | 9.16.20-r0 |
| alpine/bind(Alpine:v3.22) | < 9.16.20-r0 | 9.16.20-r0 |
| alpine/bind(Alpine:v3.23) | < 9.16.20-r0 | 9.16.20-r0 |
| alpine/bind(Alpine:v3.24) | < 9.16.20-r0 | 9.16.20-r0 |
| isc BIND9 | = Stable Branch 9.16.19 | No fix listed |
| isc BIND9 | = Development Branch 9.17.16 | No fix listed |
| isc BIND9 | = Supported Preview Edition 9.16.19-S1 | No fix listed |
References
- [oss-security] 20210818 ISC has disclosed a vulnerability in BIND (CVE-2021-25218) mailing-list patch third-party-advisory
- [oss-security] 20210820 August BIND maintenance releases contain a defect affecting servers using the map zone file format (was: A vulnerability in BIND (CVE-2021-25218) will be announced 18 August 2021) mailing-list patch third-party-advisory
- kb.isc.org exploit vendor-advisory
- FEDORA-2021-fbb258debf vendor-advisory
- security.netapp.com third-party-advisory
- security.alpinelinux.org vendor-advisory
- Debian Security Tracker CVE-2021-25218 vendor-advisory