The runc component used by `docker exec` feature of docker allowed additional container processes to be ptraced by the pid 1 of the container. This allows the main processes of the container, if running as root, to gain low-level access to these new processes during initialization. An attacker can, depending on the nature of the incoming process, leverage this to elevate access to the host. This ranges from accessing host content through the file descriptors of the incoming process to, potentially, a complete container escape by leveraging memory access or syscall interception.
Find out more about CVE-2016-9962 from the MITRE CVE dictionary dictionary and NIST NVD.
CVSS3 Base Score | 6.4 |
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CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H |
Attack Vector | Local |
Attack Complexity | High |
Privileges Required | High |
User Interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity Impact | High |
Availability Impact | High |
Platform | Errata | Release Date |
---|---|---|
Red Hat Enterprise Linux 7 Extras (docker-latest) | RHSA-2017:0123 | 2017-01-17 |
Red Hat Enterprise Linux 7 Extras (runc) | RHSA-2017:0127 | 2017-01-17 |
Red Hat Enterprise Linux 7 Extras (docker) | RHSA-2017:0116 | 2017-01-17 |