CVE-2020-8623 (GCVE-0-2020-8623)
Vulnerability from cvelistv5 – Published: 2020-08-21 20:50 – Updated: 2024-09-17 03:19
VLAI
EPSS
VEX
Title
A flaw in native PKCS#11 code can lead to a remotely triggerable assertion failure in pk11.c
Summary
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
Severity
7.5 (High)
CWE
- If BIND is built with "--enable-native-pkcs11" then a specially crafted query for a zone signed with RSA can trigger an assertion failure. Affects 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
Assigner
References
11 references
| URL | Tags |
|---|---|
| https://kb.isc.org/docs/cve-2020-8623 | x_refsource_CONFIRM |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://security.netapp.com/advisory/ntap-2020082… | x_refsource_CONFIRM |
| https://usn.ubuntu.com/4468-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://www.debian.org/security/2020/dsa-4752 | vendor-advisoryx_refsource_DEBIAN |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.debian.org/debian-lts-announce/2020… | mailing-listx_refsource_MLIST |
| https://security.gentoo.org/glsa/202008-19 | vendor-advisoryx_refsource_GENTOO |
| https://www.synology.com/security/advisory/Synolo… | x_refsource_CONFIRM |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| ISC | BIND9 |
Affected:
9.10.0 , < unspecified
(custom)
Affected: unspecified , < 9.11.22 (custom) Affected: 9.12.0 , < unspecified (custom) Affected: unspecified , < 9.16.6 (custom) Affected: 9.17.0 , < unspecified (custom) Affected: unspecified , < 9.17.4 (custom) Affected: 9.10.5-S1 , < Supported Preview* (custom) |
guessed |
Date Public
2020-08-20 00:00
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"url": "https://www.debian.org/security/2020/dsa-4752"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://www.synology.com/security/advisory/Synology_SA_20_19"
}
],
"sourceIdentifier": "security-officer@isc.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-617"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2025-11-21T14:51:27+00:00",
"cve": "CVE-2020-8623",
"id": "CVE-2020-8623",
"initial_release_date": "2020-08-20T00:00:00+00:00",
"product_status:fixed": "1739",
"product_status:known_not_affected": "9",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "bind: remotely triggerable assertion failure in pk11.c",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-8623.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-13T00:06:42Z",
"cve": "CVE-2020-8623",
"id": "CVE-2020-8623",
"initial_release_date": "2023-02-15T04:01:09Z",
"product_status:known_affected": "320",
"product_status:known_not_affected": "156",
"product_status:recommended": "989",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2020-8623",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2020-8623.json",
"version": "38"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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
| Author | Source | Type | Date | Other |
|---|
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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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.
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