Resource management error in etcd - CVE-2020-15112

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Main Vulnerability Database Vulnerabilities #VU41624

Resource management error in etcd - CVE-2020-15112

Published: August 10, 2020


Vulnerability identifier: #VU41624
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-15112
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to improper management of internal resources with the application, as it is possible to have an entry index greater then the number of entries in the ReadAll method in wal/wal.go. This could cause issues when WAL entries are being read during consensus as an arbitrary etcd consensus participant could go down from a runtime panic when reading the entry.


Affected software

etcd
IBM Edge Application Manager
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
openSUSE Leap
Ubuntu
Fedora
Red Hat OpenStack
Red Hat OpenStack for IBM Power
IBM Watson Machine Learning Accelerator
etcd-server (Ubuntu package)
etcd-client (Ubuntu package)
etcd (Ubuntu package)
etcd (Red Hat package)
etcd
etcdctl

How to mitigate CVE-2020-15112

Install updates from vendor's website.

etcd - addressed in versions 3.3.23, 3.4.10
IBM Watson Machine Learning Accelerator - update to 2.3.9
etcd-server (Ubuntu package) - update to 3.2.26+dfsg-6ubuntu0.1
etcd-client (Ubuntu package) - update to 3.2.26+dfsg-6ubuntu0.1
etcd (Ubuntu package) - update to 3.2.26+dfsg-6ubuntu0.1
etcd (Red Hat package) - addressed in versions 3.2.32-1.el7_9, 3.3.23-1.el8ost
etcd - update to 3.4.13-1.fc32
etcdctl - update to 3.5.12-150000.7.6.1
etcd - update to 3.5.12-150000.7.6.1

External References

Related Security Bulletins