CVE-2020-11934

{"containers": {"cna": {"affected": [{"product": "snapd", "vendor": "Canonical", "versions": [{"changes": [{"at": "2.45.1+18.04.2", "status": "unaffected"}, {"at": "2.45.1+20.04.2", "status": "unaffected"}], "lessThan": "2.45.1ubuntu0.2", "status": "affected", "version": "2.45.1", "versionType": "custom"}]}], "credits": [{"lang": "en", "value": "James Henstridge"}], "datePublic": "2020-05-22T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "It was discovered that snapctl user-open allowed altering the $XDG_DATA_DIRS environment variable when calling the system xdg-open. OpenURL() in usersession/userd/launcher.go would alter $XDG_DATA_DIRS to append a path to a directory controlled by the calling snap. A malicious snap could exploit this to bypass intended access restrictions to control how the host system xdg-open script opens the URL and, for example, execute a script shipped with the snap without confinement. This issue did not affect Ubuntu Core systems. Fixed in snapd versions 2.45.1ubuntu0.2, 2.45.1+18.04.2 and 2.45.1+20.04.2."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"description": "Sandbox escape vulnerability", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2020-07-29T16:25:26.000Z", "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "shortName": "canonical"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://ubuntu.com/USN-4424-1"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://launchpad.net/bugs/1880085"}], "source": {"advisory": "https://ubuntu.com/USN-4424-1", "defect": ["https://launchpad.net/bugs/1880085"], "discovery": "INTERNAL"}, "title": "Sandbox escape vulnerability via snapctl user-open (xdg-open)", "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"AKA": "", "ASSIGNER": "security@ubuntu.com", "DATE_PUBLIC": "2020-05-22T05:55:00.000Z", "ID": "CVE-2020-11934", "STATE": "PUBLIC", "TITLE": "Sandbox escape vulnerability via snapctl user-open (xdg-open)"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "snapd", "version": {"version_data": [{"platform": "", "version_affected": "<", "version_name": "2.45.1", "version_value": "2.45.1ubuntu0.2"}, {"platform": "", "version_affected": "<", "version_name": "2.45.1", "version_value": "2.45.1+18.04.2"}, {"platform": "", "version_affected": "<", "version_name": "2.45.1", "version_value": "2.45.1+20.04.2"}]}}]}, "vendor_name": "Canonical"}]}}, "configuration": [], "credit": [{"lang": "eng", "value": "James Henstridge"}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "It was discovered that snapctl user-open allowed altering the $XDG_DATA_DIRS environment variable when calling the system xdg-open. OpenURL() in usersession/userd/launcher.go would alter $XDG_DATA_DIRS to append a path to a directory controlled by the calling snap. A malicious snap could exploit this to bypass intended access restrictions to control how the host system xdg-open script opens the URL and, for example, execute a script shipped with the snap without confinement. This issue did not affect Ubuntu Core systems. 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