MGASA-2021-0412 Updated opencontainers-runc packages fix security vulnerability

runc before 1.0.0-rc95 allows a Container Filesystem Breakout via Directory Traversal. To exploit the vulnerability, an attacker must be able to create multiple containers with a fairly specific mount configuration. The problem occurs via a symlink-exchange attack that relies on a race condition...

opencontainers runc contains procfs race condition with a shared volume mount

Impact By crafting a malicious root filesystem with /proc being a symlink to a directory which was inside a volume shared with another running container, an attacker in control of both containers can trick runc into not correctly configuring the container's security labels and not correctly maski...

Symlink Attack

github.com/opencontainers/runc is vulnerable to symlink attack. An attacker, with the ability to start containers using some kind of custom volume configuration, can request a seemingly-innocuous container configuration that results in the host file system being bind-mounted into the container,...

GO-2021-0070 Privilege escalation in github.com/opencontainers/runc

GetExecUser in the github.com/opencontainers/runc/libcontainer/user package will improperly interpret numeric UIDs as usernames. If the method is used without verifying that usernames are formatted as expected, it may allow a user to gain unexpected privileges...

Insecure Authorization

github.com/opencontainers/runc does not provide secure authorization. Users who have created their config.json objects and did not prefix a deny-all rule "allow": false, "permissions": "rwm" or equivalent were not provided protection by the devices cgroup. This would allow malicious containers wi...

Updated opencontainers-runc packages fix security vulnerability

Updated opencontainers-runc package fixes security vulnerability: An attacker who controls the container image for two containers that share a volume can race volume mounts during container initialization, by adding a symlink to the rootfs that points to a directory on the volume CVE-2019-19921...

MGASA-2020-0103 Updated opencontainers-runc packages fix security vulnerability

Updated opencontainers-runc package fixes security vulnerability: An attacker who controls the container image for two containers that share a volume can race volume mounts during container initialization, by adding a symlink to the rootfs that points to a directory on the volume CVE-2019-19921...

MGASA-2020-0050 Updated opencontainers-runc packages fix security vulnerability

runc through 1.0.0-rc8, as used in Docker through 19.03.2-ce and other products, allows AppArmor restriction bypass because libcontainer/rootfslinux.go incorrectly checks mount targets, and thus a malicious Docker image can mount over a /proc directory CVE-2019-16884...

RancherOS < 1.5.1 Local Command Execution

The remote host is running a version of RancherOS prior to v1.5.1, hence it is vulnerable to a Local Command Execution Vulnerability. Opencontainers runc is prone to a local command-execution vulnerability. A local attacker can exploit this issue to execute arbitrary commands with root privileges...

Arbitrary File Read

github.com/opencontainers/runc is vulnerable to arbitrary file read. The vulnerability exists as the AppAmor restrictions can be bypassed due to incorrect mount targets check, allowing a malicious Docker image to be mounted over a /proc directory...

Updated opencontainers-runc packages fix security vulnerability

Not using pivotroot2 leaves the host /proc around in the mount namespace so that it is possible to mount another /proc without any other submount, even if /proc in the container is not fully visible. This flaw allows an attacker to read and modify some parts of the Linux kernel memory rhbz1663068...

Information Disclosure

github.com/opencontainers/runc is vulnerable to information disclosure attacks. These attacks are possible because a run exec command can be ptraced by the pid 1 of the container. Using this, it allows attackers to gain access to the file-descriptors of new processes during initialization. It may...

Updated docker packages fix security vulnerabilities

Updated docker packages fix security vulnerabilities: Lack of content verification in docker allowed a remote attacker to cause a Denial of Service via a crafted image layer payload, aka gzip bombing CVE-2017-14992. The DefaultLinuxSpec function in oci/defaults.go docker did not block /proc/scsi...

Privilege Escalation

github.com/opencontainers/runc is vulnerable to privilege escalation attacks. These attacks are possible because github.com/opencontainers/runc treats a numeric UID as a potential username. This allows local users to gain privileges though a numeric username in the password file. This transitivel...