CVE-2020-8623

A flaw in native PKCS#11 code can lead to a remotely triggerable assertion failure in pk11.c

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In BIND 9.10.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.10.5-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker that can reach a vulnerable system with a specially crafted query packet can trigger a crash. To be vulnerable, the system must: * be running BIND that was built with "--enable-native-pkcs11" * be signing one or more zones with an RSA key * be able to receive queries from a possible attacker

En BIND versiones 9.10.0 -) 9.11.21, 9.12.0 -) 9.16.5, 9.17.0 -) 9.17.3, también afecta a versiones 9.10.5-S1 -) 9.11.21-S1 de BIND 9 Supported Preview Edition, un atacante que puede llegar a un sistema vulnerable con un paquete de consulta especialmente diseñado puede desencadenar un bloqueo. Para ser vulnerable, el sistema debe: * estar ejecutando BIND que fue creado con "--enable-native-pkcs11" * estar firmando una o más zonas con una clave RSA * ser capaz de recibir consultas de un posible atacante

A flaw was found in bind. An assertion failure can occur when a specially crafted query for a zone signed with an RSA key. BIND must be compiled with "--enable-native-pkcs11" for the system to be affected. The highest threat from this vulnerability is to system availability.

*Credits: ISC would like to thank Lyu Chiy for bringing this vulnerability to our attention.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-02-05 CVE Reserved
2020-08-21 CVE Published
2024-07-27 EPSS Updated
2024-09-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption
CWE-617: Reachable Assertion

CAPEC

References (13)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2020/08/msg00053.html	Mailing List
https://security.netapp.com/advisory/ntap-20200827-0003	Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_20_19	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html	2023-11-07
https://kb.isc.org/docs/cve-2020-8623	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DQN62GBMCIC5AY4KYADGXNKVY6AJKSJE	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZKAMJZXR66P6S5LEU4SN7USSNCWTXEXP	2023-11-07
https://security.gentoo.org/glsa/202008-19	2023-11-07
https://usn.ubuntu.com/4468-1	2023-11-07
https://www.debian.org/security/2020/dsa-4752	2023-11-07
https://access.redhat.com/security/cve/CVE-2020-8623	2020-11-24
https://bugzilla.redhat.com/show_bug.cgi?id=1869477	2020-11-24

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Isc Search vendor "Isc"		Bind Search vendor "Isc" for product "Bind"				>= 9.10.0 <= 9.11.21 Search vendor "Isc" for product "Bind" and version " >= 9.10.0 <= 9.11.21"		-		Affected
Isc Search vendor "Isc"		Bind Search vendor "Isc" for product "Bind"				>= 9.12.1 <= 9.16.5 Search vendor "Isc" for product "Bind" and version " >= 9.12.1 <= 9.16.5"		-		Affected
Isc Search vendor "Isc"		Bind Search vendor "Isc" for product "Bind"				>= 9.17.0 <= 9.17.3 Search vendor "Isc" for product "Bind" and version " >= 9.17.0 <= 9.17.3"		-		Affected
Isc Search vendor "Isc"		Bind Search vendor "Isc" for product "Bind"				9.10.5 Search vendor "Isc" for product "Bind" and version "9.10.5"		s1, supported_preview		Affected
Isc Search vendor "Isc"		Bind Search vendor "Isc" for product "Bind"				9.11.21 Search vendor "Isc" for product "Bind" and version "9.11.21"		s1, supported_preview		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				31 Search vendor "Fedoraproject" for product "Fedora" and version "31"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				32 Search vendor "Fedoraproject" for product "Fedora" and version "32"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				15.1 Search vendor "Opensuse" for product "Leap" and version "15.1"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				15.2 Search vendor "Opensuse" for product "Leap" and version "15.2"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"		esm		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				20.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "20.04"		lts		Affected
Synology Search vendor "Synology"		Dns Server Search vendor "Synology" for product "Dns Server"				< 2.2.2-5027 Search vendor "Synology" for product "Dns Server" and version " < 2.2.2-5027"		-		Affected
Netapp Search vendor "Netapp"		Steelstore Cloud Integrated Storage Search vendor "Netapp" for product "Steelstore Cloud Integrated Storage"				-		-		Affected