CVE-2019-11503

snap-confine as included in snapd before 2.39 did not guard against symlink races when performing the chdir() to the current working directory of the calling user, aka a "cwd restore permission bypass."

CVSS v3 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3 : HIGH

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

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
http://www.openwall.com/lists/oss-security/2019/04/25/7	Third Party Advisory
https://github.com/snapcore/snapd/pull/6642	Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6VACEKVQ7UAZ32WO4ZKCFW6YOBSYJ76L/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VPU6APEZHAA7N2AI57OT4J2P7NKHFOLM/
https://www.openwall.com/lists/oss-security/2019/04/18/4	Exploit Mailing List Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2019/04/25/7	Third Party Advisory
https://github.com/snapcore/snapd/pull/6642	Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6VACEKVQ7UAZ32WO4ZKCFW6YOBSYJ76L/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VPU6APEZHAA7N2AI57OT4J2P7NKHFOLM/
https://www.openwall.com/lists/oss-security/2019/04/18/4	Exploit Mailing List Patch Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2019-04-24 21:29

Updated : 2024-11-21 04:21

NVD link : CVE-2019-11503

Mitre link : CVE-2019-11503

CVE.ORG link : CVE-2019-11503

JSON object : View

Products Affected

canonical

snapd

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

{"id": "CVE-2019-11503", "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:N/I:P/A:N", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV30": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2019-04-24T21:29:00.820", "references": [{"url": "http://www.openwall.com/lists/oss-security/2019/04/25/7", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/snapcore/snapd/pull/6642", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6VACEKVQ7UAZ32WO4ZKCFW6YOBSYJ76L/", "source": "cve@mitre.org"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VPU6APEZHAA7N2AI57OT4J2P7NKHFOLM/", "source": "cve@mitre.org"}, {"url": "https://www.openwall.com/lists/oss-security/2019/04/18/4", "tags": ["Exploit", "Mailing List", "Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "http://www.openwall.com/lists/oss-security/2019/04/25/7", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/snapcore/snapd/pull/6642", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6VACEKVQ7UAZ32WO4ZKCFW6YOBSYJ76L/", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VPU6APEZHAA7N2AI57OT4J2P7NKHFOLM/", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.openwall.com/lists/oss-security/2019/04/18/4", "tags": ["Exploit", "Mailing List", "Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-59"}]}], "descriptions": [{"lang": "en", "value": "snap-confine as included in snapd before 2.39 did not guard against symlink races when performing the chdir() to the current working directory of the calling user, aka a \"cwd restore permission bypass.\""}, {"lang": "es", "value": "snap-confine, como se inclu\u00eda en snap antes de la versi\u00f3n 2.39, no proteg\u00eda contra condiciones de carrera en enlaces simb\u00f3licos al realizar el chdir() al directorio de trabajo actual del usuario que realiza la llamada, tambi\u00e9n conocido como \"cwd restore permission bypass\"."}], "lastModified": "2024-11-21T04:21:13.123", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DC2D8991-F30D-41F7-8C6C-7A6A3947FFDE", "versionEndExcluding": "2.39"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}