CVE-2019-8259

UltraVNC revision 1198 contains multiple memory leaks (CWE-655) in VNC client code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1199.

CVSS v3 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf	Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-005-ultravnc-memory-leak/	Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11
https://www.us-cert.gov/ics/advisories/icsa-20-161-06	Third Party Advisory US Government Resource

Configurations

Configuration 1 (hide)

cpe:2.3:a:uvnc:ultravnc:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:a:siemens:sinumerik_access_mymachine\/p2p::::::::
	cpe:2.3:a:siemens:sinumerik_pcu_base_win10_software\/ipc::::::::
	cpe:2.3:a:siemens:sinumerik_pcu_base_win7_software\/ipc::::::::

History

No history.

Information

Published : 2019-03-05 15:29

Updated : 2021-06-28 13:15

NVD link : CVE-2019-8259

Mitre link : CVE-2019-8259

CVE.ORG link : CVE-2019-8259

JSON object : View

Products Affected

siemens

sinumerik_pcu_base_win7_software\/ipc
sinumerik_access_mymachine\/p2p
sinumerik_pcu_base_win10_software\/ipc

uvnc

ultravnc

CWE

CWE-401

Missing Release of Memory after Effective Lifetime

CWE-665

Improper Initialization

{"id": "CVE-2019-8259", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/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": "MEDIUM", "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": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2019-03-05T15:29:00.367", "references": [{"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf", "source": "vulnerability@kaspersky.com"}, {"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf", "tags": ["Third Party Advisory"], "source": "vulnerability@kaspersky.com"}, {"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf", "source": "vulnerability@kaspersky.com"}, {"url": "https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-005-ultravnc-memory-leak/", "tags": ["Third Party Advisory"], "source": "vulnerability@kaspersky.com"}, {"url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11", "source": "vulnerability@kaspersky.com"}, {"url": "https://www.us-cert.gov/ics/advisories/icsa-20-161-06", "tags": ["Third Party Advisory", "US Government Resource"], "source": "vulnerability@kaspersky.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-401"}]}, {"type": "Secondary", "source": "vulnerability@kaspersky.com", "description": [{"lang": "en", "value": "CWE-665"}]}], "descriptions": [{"lang": "en", "value": "UltraVNC revision 1198 contains multiple memory leaks (CWE-655) in VNC client code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1199."}, {"lang": "es", "value": "UltraVNC, en su revisi\u00f3n 1198, contiene m\u00faltiples fugas de memoria (CWE-655) en el c\u00f3digo del cliente VNC, lo que permite que un atacante lea memoria de la pila y puede aprovecharse para divulgar informaci\u00f3n. Si se combina con otra vulnerabilidad, puede emplearse para filtrar memoria de la pila y omitir el ASLR. Este ataque parece ser explotable mediante la conectividad de red. Esto se ha solucionado en la revisi\u00f3n 1199."}], "lastModified": "2021-06-28T13:15:11.677", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:uvnc:ultravnc:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "555D034F-3D64-4ED1-9B63-F8D59199E99C", "versionEndExcluding": "1.2.2.3"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:siemens:sinumerik_access_mymachine\\/p2p:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D9345335-DF62-4472-93CD-E2C85453F91E", "versionEndExcluding": "4.8"}, {"criteria": "cpe:2.3:a:siemens:sinumerik_pcu_base_win10_software\\/ipc:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7498412D-79FD-43FE-AD9B-5820FB5CF7D8", "versionEndExcluding": "14.00"}, {"criteria": "cpe:2.3:a:siemens:sinumerik_pcu_base_win7_software\\/ipc:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1F603341-03C5-46CA-8A74-EC5A50135194", "versionEndIncluding": "12.01"}], "operator": "OR"}]}], "sourceIdentifier": "vulnerability@kaspersky.com"}