GSD-2020-25687
Vulnerability from gsd - Updated: 2023-12-13 01:21Details
A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. This flaw allows a remote attacker, who can create valid DNS replies, to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name(), which could be abused to make the code execute memcpy() with a negative size in sort_rrset() and cause a crash in dnsmasq, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2020-25687",
"description": "A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. This flaw allows a remote attacker, who can create valid DNS replies, to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name(), which could be abused to make the code execute memcpy() with a negative size in sort_rrset() and cause a crash in dnsmasq, resulting in a denial of service. The highest threat from this vulnerability is to system availability.",
"id": "GSD-2020-25687",
"references": [
"https://www.suse.com/security/cve/CVE-2020-25687.html",
"https://www.debian.org/security/2021/dsa-4844",
"https://access.redhat.com/errata/RHSA-2021:0152",
"https://access.redhat.com/errata/RHSA-2021:0151",
"https://access.redhat.com/errata/RHSA-2021:0150",
"https://ubuntu.com/security/CVE-2020-25687",
"https://advisories.mageia.org/CVE-2020-25687.html",
"https://security.archlinux.org/CVE-2020-25687",
"https://linux.oracle.com/cve/CVE-2020-25687.html"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
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"id": "GSD-2020-25687",
"modified": "2023-12-13T01:21:56.892188Z",
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"impact": {
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"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 7.1,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:C",
"version": "2.0"
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"exploitabilityScore": 8.6,
"impactScore": 6.9,
"obtainAllPrivilege": false,
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"severity": "HIGH",
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
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},
"lastModifiedDate": "2021-03-26T18:40Z",
"publishedDate": "2021-01-20T17:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date | Other |
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Nomenclature
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vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
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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
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