gsd-2017-17439
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to the _kdc_as_rep function in kdc/kerberos5.c and the der_length_visible_string function in lib/asn1/der_length.c.
Aliases
Aliases
{ "GSD": { "alias": "CVE-2017-17439", "description": "In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to the _kdc_as_rep function in kdc/kerberos5.c and the der_length_visible_string function in lib/asn1/der_length.c.", "id": "GSD-2017-17439", "references": [ "https://www.suse.com/security/cve/CVE-2017-17439.html", "https://www.debian.org/security/2017/dsa-4055", "https://advisories.mageia.org/CVE-2017-17439.html" ] }, "gsd": { "metadata": { "exploitCode": "unknown", "remediation": "unknown", "reportConfidence": "confirmed", "type": "vulnerability" }, "osvSchema": { "aliases": [ "CVE-2017-17439" ], "details": "In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to the _kdc_as_rep function in kdc/kerberos5.c and the der_length_visible_string function in lib/asn1/der_length.c.", "id": "GSD-2017-17439", "modified": "2023-12-13T01:21:04.708555Z", "schema_version": "1.4.0" } }, "namespaces": { "cve.org": { "CVE_data_meta": { "ASSIGNER": "cve@mitre.org", "ID": "CVE-2017-17439", "STATE": "PUBLIC" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "n/a", "version": { "version_data": [ { "version_value": "n/a" } ] } } ] }, "vendor_name": "n/a" } ] } }, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "value": "In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to the _kdc_as_rep function in kdc/kerberos5.c and the der_length_visible_string function in lib/asn1/der_length.c." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "references": { "reference_data": [ { "name": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878144", "refsource": "CONFIRM", "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878144" }, { "name": "https://github.com/heimdal/heimdal/commit/1a6a6e462dc2ac6111f9e02c6852ddec4849b887", "refsource": "CONFIRM", "url": "https://github.com/heimdal/heimdal/commit/1a6a6e462dc2ac6111f9e02c6852ddec4849b887" }, { "name": "http://www.h5l.org/pipermail/heimdal-announce/2017-December/000008.html", "refsource": "CONFIRM", "url": "http://www.h5l.org/pipermail/heimdal-announce/2017-December/000008.html" }, { "name": "http://www.h5l.org/pipermail/heimdal-discuss/2017-August/000259.html", "refsource": "MISC", "url": "http://www.h5l.org/pipermail/heimdal-discuss/2017-August/000259.html" }, { "name": "https://github.com/heimdal/heimdal/issues/353", "refsource": "CONFIRM", "url": "https://github.com/heimdal/heimdal/issues/353" }, { "name": "http://h5l.org/advisories.html?show=2017-12-08", "refsource": "CONFIRM", "url": "http://h5l.org/advisories.html?show=2017-12-08" }, { "name": "DSA-4055", "refsource": "DEBIAN", "url": "https://www.debian.org/security/2017/dsa-4055" } ] } }, "nvd.nist.gov": { "configurations": { "CVE_data_version": "4.0", "nodes": [ { "children": [], "cpe_match": [ { "cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true } ], "operator": "OR" }, { "children": [], "cpe_match": [ { "cpe23Uri": "cpe:2.3:a:heimdal_project:heimdal:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndIncluding": "7.4.0", "vulnerable": true } ], "operator": "OR" } ] }, "cve": { "CVE_data_meta": { "ASSIGNER": "cve@mitre.org", "ID": "CVE-2017-17439" }, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "en", "value": "In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to the _kdc_as_rep function in kdc/kerberos5.c and the der_length_visible_string function in lib/asn1/der_length.c." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "en", "value": "CWE-476" } ] } ] }, "references": { "reference_data": [ { "name": "https://github.com/heimdal/heimdal/issues/353", "refsource": "CONFIRM", "tags": [ "Patch", "Third Party Advisory" ], "url": "https://github.com/heimdal/heimdal/issues/353" }, { "name": "https://github.com/heimdal/heimdal/commit/1a6a6e462dc2ac6111f9e02c6852ddec4849b887", "refsource": "CONFIRM", "tags": [ "Third Party Advisory" ], "url": "https://github.com/heimdal/heimdal/commit/1a6a6e462dc2ac6111f9e02c6852ddec4849b887" }, { "name": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878144", "refsource": "CONFIRM", "tags": [ "Issue Tracking", "Mailing List", "Third Party Advisory" ], "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878144" }, { "name": "http://www.h5l.org/pipermail/heimdal-discuss/2017-August/000259.html", "refsource": "MISC", "tags": [ "Third Party Advisory" ], "url": "http://www.h5l.org/pipermail/heimdal-discuss/2017-August/000259.html" }, { "name": "DSA-4055", "refsource": "DEBIAN", "tags": [ "Third Party Advisory" ], "url": "https://www.debian.org/security/2017/dsa-4055" }, { "name": "http://www.h5l.org/pipermail/heimdal-announce/2017-December/000008.html", "refsource": "CONFIRM", "tags": [], "url": "http://www.h5l.org/pipermail/heimdal-announce/2017-December/000008.html" }, { "name": "http://h5l.org/advisories.html?show=2017-12-08", "refsource": "CONFIRM", "tags": [], "url": "http://h5l.org/advisories.html?show=2017-12-08" } ] } }, "impact": { "baseMetricV2": { "cvssV2": { "accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0" }, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "severity": "MEDIUM", "userInteractionRequired": false }, "baseMetricV3": { "cvssV3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0" }, "exploitabilityScore": 3.9, "impactScore": 3.6 } }, "lastModifiedDate": "2017-12-30T02:29Z", "publishedDate": "2017-12-06T15:29Z" } } }
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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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