ISC BIND 9.11.0 < 9.16.42 / 9.11.3-S1 < 9.16.42-S1 / 9.18.0 < 9.18.16 / 9.18.11-S1 < 9.18.16-S1 / 9.19.0 < 9.19.14 Vulnerability (cve-2023-2828)

high Nessus Plugin ID 177464


The remote name server is affected by a vulnerability vulnerability.


The version of ISC BIND installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the cve-2023-2828 advisory.

- Every named instance configured to run as a recursive resolver maintains a cache database holding the responses to the queries it has recently sent to authoritative servers. The size limit for that cache database can be configured using the max-cache-size statement in the configuration file; it defaults to 90% of the total amount of memory available on the host. When the size of the cache reaches 7/8 of the configured limit, a cache-cleaning algorithm starts to remove expired and/or least-recently used RRsets from the cache, to keep memory use below the configured limit. It has been discovered that the effectiveness of the cache-cleaning algorithm used in named can be severely diminished by querying the resolver for specific RRsets in a certain order, effectively allowing the configured max-cache-size limit to be significantly exceeded.By exploiting this flaw, an attacker can cause the amount of memory used by a named resolver to go well beyond the configured max-cache-size limit. The effectiveness of the attack depends on a number of factors (e.g. query load, query patterns), but since the default value of the max-cache-size statement is 90% , in the worst case the attacker can exhaust all available memory on the host running named , leading to a denial-of-service condition. (CVE-2023-2828)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Upgrade to ISC BIND version 9.16.42 / 9.16.42-S1 / 9.18.16 / 9.18.16-S1 / 9.19.14 or later.

See Also

Plugin Details

Severity: High

ID: 177464

File Name: bind9_91914_cve-2023-2828.nasl

Version: 1.4

Type: remote

Family: DNS

Published: 6/21/2023

Updated: 9/29/2023

Configuration: Enable paranoid mode

Risk Information


Risk Factor: Medium

Score: 4.4


Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2023-2828


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:isc:bind

Required KB Items: Settings/ParanoidReport, bind/version

Exploit Ease: No known exploits are available

Patch Publication Date: 6/21/2023

Vulnerability Publication Date: 6/21/2023

Reference Information

CVE: CVE-2023-2828

IAVA: 2023-A-0320-S, 2023-A-0500