| Revision Date: | 2018-11-16 | Version: | 1 | | Title: | CVE-2018-18955 on Ubuntu 14.04 LTS (trusty) - medium. | | 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. Jann Horn discovered that the Linux kernel mishandles mapping UID or GID ranges inside nested user namespaces in some situations. A local attacker could use this to bypass access controls on resources outside the namespace.
| | Family: | unix | Class: | vulnerability | | Status: | | Reference(s): | CVE-2018-18955
| | Platform(s): | Ubuntu 14.04 LTS
| Product(s): | | | Definition Synopsis | | Ubuntu 14.04 LTS (trusty) is installed. AND Package Information
NOT While related to the CVE in some way, the 'linux' package in trusty is not affected (note: '3.11.0-12.19').
OR NOT While related to the CVE in some way, the 'linux-aws' package in trusty is not affected (note: '4.4.0-1002.2').
OR The 'linux-azure' package in trusty was vulnerable but has been fixed (note: '4.15.0-1035.36~14.04.2').
OR While related to the CVE in some way, a decision has been made to ignore it (note: 'abandoned').
OR While related to the CVE in some way, a decision has been made to ignore it (note: 'abandoned').
OR While related to the CVE in some way, a decision has been made to ignore it (note: 'abandoned').
OR While related to the CVE in some way, a decision has been made to ignore it (note: 'end-of-life').
OR While related to the CVE in some way, a decision has been made to ignore it (note: 'end-of-life').
OR While related to the CVE in some way, a decision has been made to ignore it (note: 'end-of-life').
OR NOT While related to the CVE in some way, the 'linux-lts-xenial' package in trusty is not affected (note: '4.4.0-13.29~14.04.1').
OR While related to the CVE in some way, a decision has been made to ignore it (note: 'abandoned').
OR While related to the CVE in some way, a decision has been made to ignore it (note: 'abandoned').
OR While related to the CVE in some way, a decision has been made to ignore it (note: 'abandoned').
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