CVE-2020-15112: Improper Input Validation in etcd
First published: Wed Aug 05 2020(Updated: )
A flaw was found in etcd, where it is possible to have an entry index greater than the number of entries in the ReadAll method in wal/wal.go. This can cause issues when WAL entries are being read during consensus, as an arbitrary etcd consensus participant can go down from a runtime panic when reading the entry. The highest threat from this vulnerability is to system availability.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/etcd | <0:3.2.32-1.el7_9 | 0:3.2.32-1.el7_9 |
| redhat/etcd | <0:3.3.23-1.el8 | 0:3.3.23-1.el8 |
| redhat/etcd | <3.4.10 | 3.4.10 |
| redhat/etcd | <3.3.23 | 3.3.23 |
| etcd | <3.3.23 | |
| etcd | >=3.4.0<3.4.10 | |
| Fedora | =32 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-15112 https://nvd.nist.gov/vuln/detail/CVE-2020-15112 https://github.com/etcd-io/etcd/security/advisories/GHSA-m332-53r6-2w93
- https://bugzilla.redhat.com/show_bug.cgi?id=1868872
- https://access.redhat.com/errata/RHSA-2021:1407
- https://access.redhat.com/errata/RHSA-2021:2438
- https://access.redhat.com/errata/RHSA-2021:0916
- https://access.redhat.com/security/cve/cve-2020-15112
- https://github.com/etcd-io/etcd/security/advisories/GHSA-m332-53r6-2w93
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L6B6R43Y7M3DCHWK3L3UVGE2K6WWECMP/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1868873
- https://github.com/etcd-io/etcd/commit/4571e528f49625d3de3170f219a45c3b3d38c675
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6B6R43Y7M3DCHWK3L3UVGE2K6WWECMP/
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2020-15112?
CVE-2020-15112 is a vulnerability found in etcd versions 3.3.23 and 3.4.10.
What is the severity of CVE-2020-15112?
The severity of CVE-2020-15112 is medium with a CVSS score of 6.5.
How does CVE-2020-15112 affect etcd?
CVE-2020-15112 affects etcd versions 3.3.23 and 3.4.10.
How can CVE-2020-15112 be fixed?
To fix CVE-2020-15112, update etcd to version 3.4.10 or 3.3.23, depending on your current version.
Where can I find more information about CVE-2020-15112?
More information about CVE-2020-15112 can be found in the following references: - [GitHub Security Advisory](https://github.com/etcd-io/etcd/security/advisories/GHSA-m332-53r6-2w93) - [Red Hat Bugzilla](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1868873) - [etcd GitHub commit](https://github.com/etcd-io/etcd/commit/4571e528f49625d3de3170f219a45c3b3d38c675)
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