isc bind CVE-2020-8623 vulnerability in ISC and Other Products
Published on August 21, 2020

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

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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

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Vulnerability Analysis

CVE-2020-8623 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Products Associated with CVE-2020-8623

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2020-8623 are published in these products:

ISC BIND
 
Fedora Project Fedora
 
OpenSuse Leap
 
Debian Linux
 
Canonical Ubuntu Linux
 
Synology Dns Server
 
NetApp Steelstore Cloud Integrated Storage
 

Affected Versions

ISC BIND9:

Exploit Probability

EPSS
18.13%
Percentile
95.04%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.