CVE-2020-8619 (GCVE-0-2020-8619)

Vulnerability from cvelistv5 – Published: 2020-06-17 21:20 – Updated: 2024-09-17 03:28
VLAI
Title
A buffer boundary check assertion in rdataset.c can fail incorrectly during zone transfer
Summary
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.
Severity
4.9 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE
  • The asterisk character ("*") is allowed in DNS zone files, where it is most commonly present as a wildcard at a terminal node of the Domain Name System graph. However, the RFCs do not require and BIND does not enforce that an asterisk character be present only at a terminal node. A problem can occur when an asterisk is present in an empty non-terminal location within the DNS graph. If such a node exists, after a series of queries, named can reach an inconsistent state that results in the failure of an assertion check in rbtdb.c, followed by the program exiting due to the assertion failure. Versions affected: BIND 9.11.14 -> 9.11.19, BIND 9.14.9 -> 9.14.12, BIND 9.16.0 -> 9.16.3. Also, versions 9.11.14-S1 -> 9.11.19-S1 of BIND Supported Preview Edition
Assigner
isc CNA under the mitre root
CNA scorecard A 95/100 over 33 records in the last 180 days details
References
URL Tags
https://kb.isc.org/docs/cve-2020-8619 x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://security.netapp.com/advisory/ntap-2020062… x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://usn.ubuntu.com/4399-1/ vendor-advisoryx_refsource_UBUNTU
https://www.debian.org/security/2020/dsa-4752 vendor-advisoryx_refsource_DEBIAN
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
Impacted products
Vendor Product Version CPE status
ISC BIND9 Affected: 9.11.14 through versions before 9.11.20
Affected: 9.16.0 through versions before 9.16.4
Affected: 9.11.14-S1 through versions before 9.11.20-S1
Affected: 9.14.9 through versions 9.14.12
guessed Create a notification for this product.
Date Public
2020-06-10 00:00
Show details on NVD website
To clipboard 

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          {
            "lang": "es",
            "value": "En las versiones ISC BIND9 BIND 9.11.14 -\u0026gt; 9.11.19, BIND 9.14.9 -\u0026gt; 9.14.12, BIND 9.16.0 -\u0026gt; 9.16.3, BIND Supported Preview Edition 9.11.14-S1 -\u0026gt; 9.11.19-S1: A menos que un servidor de nombres proporcione un servicio autorizado para una o m\u00e1s zonas y al menos una zona contenga una entrada sin terminal vac\u00eda que contenga un car\u00e1cter asterisco (\"*\"), este defecto no puede ser encontrado. Un posible atacante al que se le permite cambiar el contenido de la zona, podr\u00eda introducir te\u00f3ricamente dicho registro para explotar esta condici\u00f3n y causar una denegaci\u00f3n de servicio, aunque consideramos que el uso de este vector es poco probable porque cualquier ataque requerir\u00eda de un nivel de privilegio significativo y que sea f\u00e1cilmente rastreable"
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      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2023/cve-2020-8619.json",
      "version": "38"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.