{"containers": {"cna": {"affected": [{"product": "xrdp", "vendor": "neutrinolabs", "versions": [{"status": "affected", "version": "< 0.9.13.1"}]}], "descriptions": [{"lang": "en", "value": "The xrdp-sesman service before version 0.9.13.1 can be crashed by connecting over port 3350 and supplying a malicious payload. Once the xrdp-sesman process is dead, an unprivileged attacker on the server could then proceed to start their own imposter sesman service listening on port 3350. This will allow them to capture any user credentials that are submitted to XRDP and approve or reject arbitrary login credentials. For xorgxrdp sessions in particular, this allows an unauthorized user to hijack an existing session. 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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:*", "matchCriteriaId": "AB124086-296A-4B17-A012-556DDF1E7E12", "versionEndExcluding": "0.9.13.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The xrdp-sesman service before version 0.9.13.1 can be crashed by connecting over port 3350 and supplying a malicious payload. Once the xrdp-sesman process is dead, an unprivileged attacker on the server could then proceed to start their own imposter sesman service listening on port 3350. This will allow them to capture any user credentials that are submitted to XRDP and approve or reject arbitrary login credentials. For xorgxrdp sessions in particular, this allows an unauthorized user to hijack an existing session. This is a buffer overflow attack, so there may be a risk of arbitrary code execution as well."}, {"lang": "es", "value": "El servicio xrdp-sesman versiones anteriores a 0.9.13.1 puede ser bloqueado al conectarse a trav\u00e9s del puerto 3350 y suministrando una carga maliciosa. Una vez que el proceso xrdp-sesman est\u00e1 inactivo, un atacante sin privilegios en el servidor podr\u00eda comenzar a iniciar su propio servicio impostor sesman escuchando en el puerto 3350. Esto les permitir\u00e1 capturar cualquier credencial de usuario que sea enviada a XRDP y aprobar o rechazar credenciales de inicio de sesi\u00f3n arbitrarias. Para las sesiones xorgxrdp en particular, esto permite a un usuario no autorizado secuestrar una sesi\u00f3n existente. Este es un ataque de desbordamiento del b\u00fafer, por lo que tambi\u00e9n puede existir un riesgo de ejecuci\u00f3n de c\u00f3digo arbitraria"}], "id": "CVE-2020-4044", "lastModified": "2020-08-14T21:15:14.397", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.6, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2020-06-30T16:15:16.203", "references": [{"source": "security-advisories@github.com", "url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00036.html"}, {"source": "security-advisories@github.com", "url": "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00037.html"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/neutrinolabs/xrdp/commit/0c791d073d0eb344ee7aaafd221513dc9226762c"}, {"source": "security-advisories@github.com", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/neutrinolabs/xrdp/releases/tag/v0.9.13.1"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-j9fv-6fwf-p3g4"}, {"source": "security-advisories@github.com", "url": "https://lists.debian.org/debian-lts-announce/2020/08/msg00015.html"}, {"source": "security-advisories@github.com", "url": "https://www.debian.org/security/2020/dsa-4737"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-121"}], "source": "security-advisories@github.com", "type": "Primary"}]}

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