CVE-2021-26567

Stack-based buffer overflow vulnerability in frontend/main.c in faad2 before 2.2.7.1 allow local attackers to execute arbitrary code via filename and pathname options.

CVSS v3 7.8 HIGH
CVSS v2.0 6.5 MEDIUM

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.5^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:P/I:P/A:P

Exploitability : 8.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/knik0/faad2/commit/720f7004d6c4aabee19aad16e7c456ed76a3ebfa	Patch
https://www.synology.com/security/advisory/Synology_SA_20_26	Vendor Advisory
https://github.com/knik0/faad2/commit/720f7004d6c4aabee19aad16e7c456ed76a3ebfa	Patch
https://www.synology.com/security/advisory/Synology_SA_20_26	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:synology:diskstation_manager:*:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:synology:vs960hd_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:synology:vs960hd:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:o:synology:skynas_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:synology:skynas:-:*:*:*:*:*:*:*

Configuration 4 (hide)

AND

cpe:2.3:o:synology:diskstation_manager_unified_controller:3.0:*:*:*:*:*:*:*

cpe:2.3:h:synology:uc3200:-:*:*:*:*:*:*:*

Configuration 5 (hide)

cpe:2.3:a:faad2_project:faad2:*:*:*:*:*:*:*:*

History

14 Jan 2025, 19:29

Type	Values Removed	Values Added
CPE	cpe:2.3:a:synology:diskstation_manager::::::::	cpe:2.3:o:synology:diskstation_manager::::::::

Information

Published : 2021-02-26 22:15

Updated : 2025-01-14 19:29

NVD link : CVE-2021-26567

Mitre link : CVE-2021-26567

CVE.ORG link : CVE-2021-26567

JSON object : View

Products Affected

synology

skynas
uc3200
vs960hd_firmware
diskstation_manager_unified_controller
skynas_firmware
vs960hd
diskstation_manager

faad2_project

faad2

CWE

CWE-121

Stack-based Buffer Overflow

CWE-787

Out-of-bounds Write

{"id": "CVE-2021-26567", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 6.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P", "authentication": "SINGLE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2021-02-26T22:15:20.707", "references": [{"url": "https://github.com/knik0/faad2/commit/720f7004d6c4aabee19aad16e7c456ed76a3ebfa", "tags": ["Patch"], "source": "security@synology.com"}, {"url": "https://www.synology.com/security/advisory/Synology_SA_20_26", "tags": ["Vendor Advisory"], "source": "security@synology.com"}, {"url": "https://github.com/knik0/faad2/commit/720f7004d6c4aabee19aad16e7c456ed76a3ebfa", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.synology.com/security/advisory/Synology_SA_20_26", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "security@synology.com", "description": [{"lang": "en", "value": "CWE-121"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "Stack-based buffer overflow vulnerability in frontend/main.c in faad2 before 2.2.7.1 allow local attackers to execute arbitrary code via filename and pathname options."}, {"lang": "es", "value": "La vulnerabilidad de desbordamiento de b\u00fafer basada en la pila en frontend/main.c en faad2 versiones anteriores a 2.2.7.1 permite a los atacantes locales ejecutar c\u00f3digo arbitrario a trav\u00e9s de las opciones de nombre de archivo y ruta."}], "lastModified": "2025-01-14T19:29:55.853", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:synology:diskstation_manager:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1628C07C-CCA7-463C-AA98-BF86C97B0D58", "versionEndExcluding": "6.2.3-25426-3"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:synology:vs960hd_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3D0C5120-B961-440F-B454-584BC54B549C"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:synology:vs960hd:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "1CCBDFF9-AF42-4681-879B-CF789EBAD130"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:synology:skynas_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "53EF087B-D7E9-4F9A-803A-B0260C495C67"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:synology:skynas:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "D0A88A76-CF8A-4D29-B480-E5317219072D"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:synology:diskstation_manager_unified_controller:3.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6B04366E-B5F8-4835-B1FB-106AFD3D3785"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:synology:uc3200:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "1100D972-198E-45F9-8F04-763F6FE88377"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:faad2_project:faad2:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "201E5CDD-7F7D-44BB-80F8-C23DF44C2AAC", "versionEndExcluding": "2.2.7.1"}], "operator": "OR"}]}], "sourceIdentifier": "security@synology.com"}