CVE-2020-8619

A buffer boundary check assertion in rdataset.c can fail incorrectly during zone transfer

Severity Score

4.9

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In ISC BIND9 versions BIND 9.11.14 -> 9.11.19, BIND 9.14.9 -> 9.14.12, BIND 9.16.0 -> 9.16.3, BIND Supported Preview Edition 9.11.14-S1 -> 9.11.19-S1: Unless a nameserver is providing authoritative service for one or more zones and at least one zone contains an empty non-terminal entry containing an asterisk ("*") character, this defect cannot be encountered. A would-be attacker who is allowed to change zone content could theoretically introduce such a record in order to exploit this condition to cause denial of service, though we consider the use of this vector unlikely because any such attack would require a significant privilege level and be easily traceable.

En las versiones ISC BIND9 BIND 9.11.14 -> 9.11.19, BIND 9.14.9 -> 9.14.12, BIND 9.16.0 -> 9.16.3, BIND Supported Preview Edition 9.11.14-S1 -> 9.11.19-S1: A menos que un servidor de nombres proporcione un servicio autorizado para una o más zonas y al menos una zona contenga una entrada sin terminal vacía que contenga un carácter asterisco ("*"), este defecto no puede ser encontrado. Un posible atacante al que se le permite cambiar el contenido de la zona, podría introducir teóricamente dicho registro para explotar esta condición y causar una denegación de servicio, aunque consideramos que el uso de este vector es poco probable porque cualquier ataque requeriría de un nivel de privilegio significativo y que sea fácilmente rastreable

A flaw was found in bind when an asterisk character is present in an empty non-terminal location within the DNS graph. This flaw could trigger an assertion failure, causing bind to crash. The highest threat from this vulnerability is to system availability.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

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
2020-06-17 CVE Published
2024-05-01 EPSS Updated
2024-09-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-404: Improper Resource Shutdown or Release
CWE-617: Reachable Assertion

CAPEC

References (10)

URL	Tag	Source
https://security.netapp.com/advisory/ntap-20200625-0003	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-2020-8619	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNFTTYJ5JJJJ6QG3AHXJGDIIEYMDFWFW	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EIOXMJX4N3LBKC65OXNBE52W4GAS7QEX	2023-11-07
https://usn.ubuntu.com/4399-1	2023-11-07
https://www.debian.org/security/2020/dsa-4752	2023-11-07
https://access.redhat.com/security/cve/CVE-2020-8619	2020-11-04
https://bugzilla.redhat.com/show_bug.cgi?id=1847244	2020-11-04

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"				>= 9.11.14 <= 9.11.19 Search vendor "Isc" for product "Bind" and version " >= 9.11.14 <= 9.11.19"		-		Affected
Isc Search vendor "Isc"		Bind Search vendor "Isc" for product "Bind"				>= 9.11.14-s1 <= 9.11.19-s1 Search vendor "Isc" for product "Bind" and version " >= 9.11.14-s1 <= 9.11.19-s1"		preview		Affected
Isc Search vendor "Isc"		Bind Search vendor "Isc" for product "Bind"				>= 9.14.9 <= 9.14.12 Search vendor "Isc" for product "Bind" and version " >= 9.14.9 <= 9.14.12"		-		Affected
Isc Search vendor "Isc"		Bind Search vendor "Isc" for product "Bind"				>= 9.16.0 <= 9.16.3 Search vendor "Isc" for product "Bind" and version " >= 9.16.0 <= 9.16.3"		-		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"				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"				20.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "20.04"		lts		Affected
Netapp Search vendor "Netapp"		Steelstore Cloud Integrated Storage Search vendor "Netapp" for product "Steelstore Cloud Integrated Storage"				-		-		Affected