PT-2021-6565 · Isc+1 · Bind+1

Michael Mcnally · Published 2021-08-18 · Updated 2024-06-15 · CVE-2021-25218

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions BIND versions 9.16.19 through 9.17.16 BIND Supported Preview Edition version 9.16.19-S1

Description The issue is related to insufficient use of the assert() function in the named component of the DNS server BIND. When a vulnerable version of named receives a query, the named process will terminate due to a failed assertion check. This allows a remote attacker to cause a denial of service.

Recommendations For BIND versions 9.16.19 through 9.17.16, update to version 9.17.17 or 9.16.20 to resolve the issue. For BIND Supported Preview Edition version 9.16.19-S1, update to a version that includes the security patches, such as version 9.16.20.

Exploit

Fix

Assertion Failure

Weakness Enumeration

CWE-617

Related Identifiers

BDU:2022-01831

CVE-2021-25218

OPENSUSE-SU-2024:10650-1

Affected Products

Bind

Bind Server

References · 50

• 🔥 https://kb.isc.org/v1/docs/cve-2021-25218 · Exploit
• https://osv.dev/vulnerability/CVE-2021-25218 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-25218 · Security Note
• http://openwall.com/lists/oss-security/2021/08/20/2 · Patch
• https://osv.dev/vulnerability/ALPINE-CVE-2021-25218 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-01831 · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZPJCLGSR4BTGFLBLGIE5TEQP2SNJKGVL · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-25218 · Vendor Advisory
• http://openwall.com/lists/oss-security/2021/08/18/3 · Patch
• https://osv.dev/vulnerability/openSUSE-SU-2024:10650-1 · Vendor Advisory
• https://suse.com/security/cve/CVE-2016-9778 · Note
• https://suse.com/security/cve/CVE-2021-25216 · Note
• https://suse.com/security/cve/CVE-2018-5745 · Note
• https://suse.com/security/cve/CVE-2006-4339 · Note
• https://suse.com/security/cve/CVE-2016-2775 · Note