CVE-2020-8943

An arbitrary memory read vulnerability in Asylo versions up to 0.6.0 allows an untrusted attacker to make a call to enc_untrusted_recvfrom whose return size was not validated against the requested size. The parameter size is unchecked allowing the attacker to read memory locations outside of the intended buffer size including memory addresses within the secure enclave. We recommend upgrading past commit 6e158d558abd3c29a0208e30c97c9a8c5bd4230f

CVSS v3 5.3 MEDIUM
CVSS v2.0 2.1 LOW

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.0 / Impact : 4.2

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

2.1^/10

CVSS v2.0 : LOW

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

Exploitability : 3.9 / Impact : 2.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://github.com/google/asylo/commit/6e158d558abd3c29a0208e30c97c9a8c5bd4230f	Patch Third Party Advisory
https://github.com/google/asylo/commit/6e158d558abd3c29a0208e30c97c9a8c5bd4230f	Patch Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:google:asylo:*:*:*:*:*:*:*:*

History

21 Nov 2024, 05:39

Type	Values Removed	Values Added
References	~~() https://github.com/google/asylo/commit/6e158d558abd3c29a0208e30c97c9a8c5bd4230f - Patch, Third Party Advisory~~	() https://github.com/google/asylo/commit/6e158d558abd3c29a0208e30c97c9a8c5bd4230f - Patch, Third Party Advisory
CVSS	v2 : ~~2.1~~ v3 : ~~5.5~~	v2 : 2.1 v3 : 5.3

Information

Published : 2020-12-15 15:15

Updated : 2024-11-21 05:39

NVD link : CVE-2020-8943

Mitre link : CVE-2020-8943

CVE.ORG link : CVE-2020-8943

JSON object : View

Products Affected

google

asylo

CWE

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CWE-125

Out-of-bounds Read

{"id": "CVE-2020-8943", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 2.1, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "LOW", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Secondary", "source": "cve-coordination@google.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 4.2, "exploitabilityScore": 1.0}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2020-12-15T15:15:13.643", "references": [{"url": "https://github.com/google/asylo/commit/6e158d558abd3c29a0208e30c97c9a8c5bd4230f", "tags": ["Patch", "Third Party Advisory"], "source": "cve-coordination@google.com"}, {"url": "https://github.com/google/asylo/commit/6e158d558abd3c29a0208e30c97c9a8c5bd4230f", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "cve-coordination@google.com", "description": [{"lang": "en", "value": "CWE-120"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "An arbitrary memory read vulnerability in Asylo versions up to 0.6.0 allows an untrusted attacker to make a call to enc_untrusted_recvfrom whose return size was not validated against the requested size. The parameter size is unchecked allowing the attacker to read memory locations outside of the intended buffer size including memory addresses within the secure enclave. We recommend upgrading past commit 6e158d558abd3c29a0208e30c97c9a8c5bd4230f"}, {"lang": "es", "value": "Una vulnerabilidad de lectura de memoria arbitraria en Asylo versiones hasta 0.6.0, permite a un atacante que no es confiable realizar una llamada a la funci\u00f3n enc_untrusted_recvfrom cuyo tama\u00f1o de retorno no se comprob\u00f3 contra el tama\u00f1o solicitado. El tama\u00f1o del par\u00e1metro no es comprobado, permitiendo al atacante leer ubicaciones de memoria fuera del tama\u00f1o de b\u00fafer previsto, incluyendo unas direcciones de memoria dentro del enclave seguro. Recomendamos actualizar m\u00e1s all\u00e1 del commit 6e158d558abd3c29a0208e30c97c9a8c5bd4230f"}], "lastModified": "2024-11-21T05:39:42.733", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:google:asylo:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D4356338-A28E-442E-BD14-1A927E3824E9", "versionEndIncluding": "0.6.0"}], "operator": "OR"}]}], "sourceIdentifier": "cve-coordination@google.com"}