Red Hat Enterprise Linux 7 Extras update for docker

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU22482

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-16884

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The 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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

docker (Red Hat package): 1.13.1-74.git6e3bb8e.el7 - 1.13.1-104.git4ef4b30.el7

Red Hat Enterprise Linux for Power, little endian: 7

Red Hat Enterprise Linux for IBM z Systems: 7

Red Hat Enterprise Linux Server: 7

External links

http://access.redhat.com/errata/RHSA-2020:1234

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Use-after-free

EUVDB-ID: #VU25501

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8945

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error, as demonstrated by use for container image pulls by Docker or CRI-O. A remote attacker can crash the target system, or cause potential code execution for Go applications that use this library under certain conditions during GPG signature verification.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

docker (Red Hat package): 1.13.1-74.git6e3bb8e.el7 - 1.13.1-104.git4ef4b30.el7

Red Hat Enterprise Linux for Power, little endian: 7

Red Hat Enterprise Linux for IBM z Systems: 7

Red Hat Enterprise Linux Server: 7

External links

http://access.redhat.com/errata/RHSA-2020:1234

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Resource exhaustion

EUVDB-ID: #VU26514

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-1702

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application reads the entire image manifest file into memory. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack by supplying a huge manifest file.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

docker (Red Hat package): 1.13.1-74.git6e3bb8e.el7 - 1.13.1-104.git4ef4b30.el7

Red Hat Enterprise Linux for Power, little endian: 7

Red Hat Enterprise Linux for IBM z Systems: 7

Red Hat Enterprise Linux Server: 7

External links

http://access.redhat.com/errata/RHSA-2020:1234

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.