CVE-2021-27439

TencentOS-tiny version 3.1.0 is vulnerable to integer wrap-around in function 'tos_mmheap_alloc incorrect calculation of effective memory allocation size. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.

CVSS v3 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

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

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04	Third Party Advisory US Government Resource

Configurations

Configuration 1 (hide)

cpe:2.3:o:tencent:tencentos-tiny:3.1.0:*:*:*:*:*:*:*

History

12 May 2022, 12:27

Type	Values Removed	Values Added
CPE		cpe:2.3:o:tencent:tencentos-tiny:3.1.0:::::::*
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : 7.5 v3 : 9.8
References	~~(CONFIRM) https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04 -~~	(CONFIRM) https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04 - Third Party Advisory, US Government Resource
First Time		Tencent Tencent tencentos-tiny

03 May 2022, 21:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2022-05-03 21:15

Updated : 2023-12-10 14:22

NVD link : CVE-2021-27439

Mitre link : CVE-2021-27439

CVE.ORG link : CVE-2021-27439

JSON object : View

Products Affected

tencent

tencentos-tiny

CWE

CWE-190

Integer Overflow or Wraparound

{"id": "CVE-2021-27439", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "ics-cert@hq.dhs.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.3, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 3.4, "exploitabilityScore": 3.9}]}, "published": "2022-05-03T21:15:08.703", "references": [{"url": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04", "tags": ["Third Party Advisory", "US Government Resource"], "source": "ics-cert@hq.dhs.gov"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "ics-cert@hq.dhs.gov", "description": [{"lang": "en", "value": "CWE-190"}]}], "descriptions": [{"lang": "en", "value": "TencentOS-tiny version 3.1.0 is vulnerable to integer wrap-around in function 'tos_mmheap_alloc incorrect calculation of effective memory allocation size. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution."}, {"lang": "es", "value": "TencentOS-tinyv versi\u00f3n 3.1.0, es vulnerable a una envoltura de enteros en el c\u00e1lculo incorrecto de la funci\u00f3n \"tos_mmheap_alloc del tama\u00f1o efectivo de asignaci\u00f3n de memoria. Esta asignaci\u00f3n de memoria incorrecta puede conllevar a una asignaci\u00f3n de memoria arbitraria, resultando en un comportamiento no esperado como un bloqueo o una inyecci\u00f3n/ejecuci\u00f3n de c\u00f3digo remota"}], "lastModified": "2022-05-12T12:27:38.660", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:tencent:tencentos-tiny:3.1.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3282CF59-3AD7-4FC0-AA46-8C1C222429D4"}], "operator": "OR"}]}], "sourceIdentifier": "ics-cert@hq.dhs.gov"}