CVE-2021-25218 : In BIND 9.16.19, 9.17.16. Also, version 9.16.19-S1 of BIND Supported Preview Edi

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.

Published 2021-08-18 19:15:07

Updated 2021-09-16 12:30:54

Source Internet Systems Consortium (ISC)

View at NVD, CVE.org

Products affected by CVE-2021-25218

ISC » Bind » Version: 9.16.19
cpe:2.3:a:isc:bind:9.16.19:*:*:*:-:*:*:*
Matching versions
ISC » Bind » Version: 9.17.16
cpe:2.3:a:isc:bind:9.17.16:*:*:*:-:*:*:*
Matching versions
ISC » Bind » Version: 9.17.16 Update S1 Supported Preview Edition
cpe:2.3:a:isc:bind:9.17.16:s1:*:*:supported_preview:*:*:*
Matching versions
Fedoraproject » Fedora » Version: 34
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2021-25218

Top countries where our scanners detected CVE-2021-25218

Top open port discovered on systems with this issue 53

IPs affected by CVE-2021-25218 1,612

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2021-25218!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-25218

EPSS FAQ

0.24%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 61 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-25218

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	Internet Systems Consortium (ISC)
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2021-25218

CWE-617 Reachable Assertion

The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-25218

https://kb.isc.org/v1/docs/cve-2021-25218

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 - Security Advisories
Exploit;Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZPJCLGSR4BTGFLBLGIE5TEQP2SNJKGVL/

[SECURITY] Fedora 34 Update: bind-dyndb-ldap-11.9-4.fc34 - package-announce - Fedora Mailing-Lists
Mailing List;Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/08/20/2

oss-security - 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
https://security.netapp.com/advisory/ntap-20210909-0002/

CVE-2021-25218 ISC BIND Vulnerability in NetApp Products | NetApp Product Security
Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/08/18/3

oss-security - ISC has disclosed a vulnerability in BIND (CVE-2021-25218)
Mailing List;Patch;Third Party Advisory