CVE-ID |
CVE-2018-18955
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• CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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Description |
In the Linux kernel 4.15.x through 4.19.x before 4.19.2, map_write()
in kernel/user_namespace.c allows privilege escalation because it
mishandles nested user namespaces with more than 5 UID or GID ranges.
A user who has CAP_SYS_ADMIN in an affected user namespace can bypass
access controls on resources outside the namespace, as demonstrated by
reading /etc/shadow. This occurs because an ID transformation takes
place properly for the namespaced-to-kernel direction but not for the
kernel-to-namespaced direction.
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References |
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
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Assigning CNA |
MITRE Corporation |
Date Entry Created |
20181105 |
Disclaimer: The entry creation date may reflect when
the CVE ID was allocated or reserved, and does not
necessarily indicate when this vulnerability was
discovered, shared with the affected vendor, publicly
disclosed, or updated in CVE.
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Phase (Legacy) |
Assigned (20181105) |
Votes (Legacy) |
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Comments (Legacy) |
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Proposed (Legacy) |
N/A |
This is an entry on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities. |
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For More Information: cve@mitre.org
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