Gentoo update for runC
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2019-16884 CVE-2019-19921 CVE-2019-5736 |
| CWE-ID | CWE-264 CWE-284 |
| Exploitation vector | Local |
| Public exploit |
Public exploit code for vulnerability #2 is available. Public exploit code for vulnerability #3 is available. |
| Vulnerable software Subscribe |
Gentoo Linux Operating systems & Components / Operating system |
| Vendor | Gentoo |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Permissions, Privileges, and Access Controls
EUVDB-ID: #VU22482
Risk: Low
CVSSv3.1:
CVE-ID: CVE-2019-16884
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to incorrect checking of the mount targets in libcontainer/rootfs_linux.go in runc. A local user can bypass AppArmor restrictions and perform unauthorized actions on the system, as demonstrated by overwriting the /proc directory with a malicious Doker image.
MitigationUpdate the affected packages.
app-emulation/runc to version:
Gentoo Linux: All versions
CPE2.3 External links
http://security.gentoo.org/
http://security.gentoo.org/glsa/202003-21
Q & A
Can this vulnerability be exploited remotely?
Is there known malware, which exploits this vulnerability?
2) Improper access control
EUVDB-ID: #VU25847
Risk: Low
CVSSv3.1:
CVE-ID: CVE-2019-19921
CWE-ID:
CWE-284 - Improper Access Control
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain unauthorized access to sensitive information.
The vulnerability exists due to improper access restrictions, related to libcontainer/rootfs_linux.go in runc. A local user with ability to spawn two containers with custom volume-mount configurations, and run custom images can escalate privileges on the system.
Update the affected packages.
app-emulation/runc to version:
Gentoo Linux: All versions
CPE2.3 External links
http://security.gentoo.org/
http://security.gentoo.org/glsa/202003-21
Q & A
Can this vulnerability be exploited remotely?
Is there known malware, which exploits this vulnerability?
3) Privilege escalation
EUVDB-ID: #VU17474
Risk: Medium
CVSSv3.1:
CVE-ID: CVE-2019-5736
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to gain elevated privileges.
The weakness exists in the runc container runtime due to file-descriptor mishandling, related to /proc/self/exe. A remote attacker can leverage the ability to execute a command as root within one of these types of containers: (1) a new container with an attacker-controlled image, or (2) an existing container, to which the attacker previously had write access, that can be attached with docker exec, overwrite the host runc binary with minimal user interaction and execute arbitrary code with root privileges.
Successful exploitation of the vulnerability may result in system compromise.
Update the affected packages.
app-emulation/runc to version:
Gentoo Linux: All versions
CPE2.3 External links
http://security.gentoo.org/
http://security.gentoo.org/glsa/202003-21
Q & A
Can this vulnerability be exploited remotely?
Is there known malware, which exploits this vulnerability?
