CVE-2016-9952

The verify_certificate function in lib/vtls/schannel.c in libcurl 7.30.0 through 7.51.0, when built for Windows CE using the schannel TLS backend, makes it easier for remote attackers to conduct man-in-the-middle attacks via a crafted wildcard SAN in a server certificate, as demonstrated by "*.com."

CVSS v3 8.1 HIGH
CVSS v2.0 6.8 MEDIUM

8.1^/10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:P

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://curl.haxx.se/CVE-2016-9952.patch	Vendor Advisory
https://curl.haxx.se/docs/adv_20161221B.html	Vendor Advisory
https://curl.haxx.se/CVE-2016-9952.patch	Vendor Advisory
https://curl.haxx.se/docs/adv_20161221B.html	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows_embedded_compact:-:*:*:*:*:*:*:*

History

21 Nov 2024, 03:02

Type	Values Removed	Values Added
References	~~() https://curl.haxx.se/CVE-2016-9952.patch - Vendor Advisory~~	() https://curl.haxx.se/CVE-2016-9952.patch - Vendor Advisory
References	~~() https://curl.haxx.se/docs/adv_20161221B.html - Vendor Advisory~~	() https://curl.haxx.se/docs/adv_20161221B.html - Vendor Advisory

15 Dec 2023, 19:06

Type	Values Removed	Values Added
CPE	cpe:2.3:o:microsoft:windows_ce:-:::::::*	cpe:2.3:o:microsoft:windows_embedded_compact:-:::::::*

Information

Published : 2018-03-12 21:29

Updated : 2024-11-21 03:02

NVD link : CVE-2016-9952

Mitre link : CVE-2016-9952

CVE.ORG link : CVE-2016-9952

JSON object : View

Products Affected

haxx

curl

microsoft

windows_embedded_compact

CWE

CWE-295

Improper Certificate Validation

{"id": "CVE-2016-9952", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 6.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV30": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.2}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.2}]}, "published": "2018-03-12T21:29:00.500", "references": [{"url": "https://curl.haxx.se/CVE-2016-9952.patch", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://curl.haxx.se/docs/adv_20161221B.html", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://curl.haxx.se/CVE-2016-9952.patch", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://curl.haxx.se/docs/adv_20161221B.html", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-295"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-295"}]}], "descriptions": [{"lang": "en", "value": "The verify_certificate function in lib/vtls/schannel.c in libcurl 7.30.0 through 7.51.0, when built for Windows CE using the schannel TLS backend, makes it easier for remote attackers to conduct man-in-the-middle attacks via a crafted wildcard SAN in a server certificate, as demonstrated by \"*.com.\""}, {"lang": "es", "value": "La funci\u00f3n verify_certificate en lib/vtls/schannel.c en libcurl, desde la versi\u00f3n 7.30.0 hasta la 7.51.0, cuando se construye para Windows CE usando el backend TLS schannel, facilita la ejecuci\u00f3n de ataques Man-in-the-Middle (MitM) por parte de atacantes remotos mediante un wildcard SAN manipulado en un certificado de servidor, tal y como demuestra \"*.com\"."}], "lastModified": "2024-11-21T03:02:03.960", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "25ACEC30-625F-46E6-8F95-5550CEA47EF8", "versionEndIncluding": "7.51.0", "versionStartIncluding": "7.30.0"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows_embedded_compact:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "48927A5E-B938-4D59-84E1-4C05AA80F69C"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "cve@mitre.org"}

8.1 /10