CVE-2018-6480

A type confusion issue was discovered in CCN-lite 2, leading to a memory access violation and a failure of the nonce feature (which, for example, helped with loop prevention). ccnl_fwd_handleInterest assumes that the union member s is of type ccnl_pktdetail_ndntlv_s. However, if the type is in fact struct ccnl_pktdetail_ccntlv_s or struct ccnl_pktdetail_iottlv_s, the memory at that point is either uninitialised or points to data that is not a nonce, which renders the code using the local variable nonce pointless. A later nonce check is insufficient.

CVSS v3 8.8 HIGH
CVSS v2.0 6.8 MEDIUM

8.8^/10

CVSS v3 : HIGH

Vector : AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

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://github.com/cn-uofbasel/ccn-lite/issues/159	Third Party Advisory
https://github.com/cn-uofbasel/ccn-lite/issues/159	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:ccn-lite:ccn-lite:2.0.0:*:*:*:*:*:*:*

History

21 Nov 2024, 04:10

Type	Values Removed	Values Added
References	~~() https://github.com/cn-uofbasel/ccn-lite/issues/159 - Third Party Advisory~~	() https://github.com/cn-uofbasel/ccn-lite/issues/159 - Third Party Advisory

Information

Published : 2018-01-31 20:29

Updated : 2024-11-21 04:10

NVD link : CVE-2018-6480

Mitre link : CVE-2018-6480

CVE.ORG link : CVE-2018-6480

JSON object : View

Products Affected

ccn-lite

ccn-lite

CWE

CWE-704

Incorrect Type Conversion or Cast

{"id": "CVE-2018-6480", "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": true}], "cvssMetricV30": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "published": "2018-01-31T20:29:00.790", "references": [{"url": "https://github.com/cn-uofbasel/ccn-lite/issues/159", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/cn-uofbasel/ccn-lite/issues/159", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-704"}]}], "descriptions": [{"lang": "en", "value": "A type confusion issue was discovered in CCN-lite 2, leading to a memory access violation and a failure of the nonce feature (which, for example, helped with loop prevention). ccnl_fwd_handleInterest assumes that the union member s is of type ccnl_pktdetail_ndntlv_s. However, if the type is in fact struct ccnl_pktdetail_ccntlv_s or struct ccnl_pktdetail_iottlv_s, the memory at that point is either uninitialised or points to data that is not a nonce, which renders the code using the local variable nonce pointless. A later nonce check is insufficient."}, {"lang": "es", "value": "Se ha descubierto un problema de confusi\u00f3n de tipos en CCN-lite 2 que conduce a una violaci\u00f3n de acceso a la memoria y un fallo de la caracter\u00edstica nonce (que, por ejemplo, ayudaba con la prevenci\u00f3n de bucles). ccnl_fwd_handleInterest asume que el miembro de uni\u00f3n s es de tipo ccnl_pktdetail_ndntlv_s. Sin embargo, si el tipo es en realidad es el struct ccnl_pktdetail_ccntlv_s o el struct ccnl_pktdetail_iottlv_s, la memoria en ese punto o no est\u00e1 inicializado o se\u00f1ala a datos que no son nonce, que representan el c\u00f3digo empleando la variable local nonce sin punto. La comprobaci\u00f3n nonce posterior es insuficiente."}], "lastModified": "2024-11-21T04:10:44.793", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:ccn-lite:ccn-lite:2.0.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "83C4FA31-E39A-4AE2-8F60-BBC51D874467"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}