medium
6.5
CWE
306 287
Advisory Published
CVE Published
Advisory Published
Updated

CVE-2020-15136: Improper authentication in etcd

First published: Wed Aug 05 2020(Updated: )

### Vulnerability type Cryptography ### Workarounds Refer to the [gateway documentation](https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/gateway.md). The vulnerability was spotted due to unclear documentation of how the gateway handles endpoints validation. ### Detail When starting a gateway, TLS authentication will only be attempted on endpoints identified in DNS SRV records for a given domain, which occurs in the discoverEndpoints function. No authentication is performed against endpoints provided in the --endpoints flag. The auditors has noted that appropriate documentation of this validation functionality plus deprecation of this misleading functionality is an acceptable path forward. ### References Find out more on this vulnerability in the [security audit report](https://github.com/etcd-io/etcd/blob/master/security/SECURITY_AUDIT.pdf) ### For more information If you have any questions or comments about this advisory: * Contact the [etcd security committee](https://github.com/etcd-io/etcd/blob/master/security/security-release-process.md#product-security-committee-psc)

Credit: security-advisories@github.com security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
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
go/go.etcd.io/etcd<3.3.23
3.3.23
go/go.etcd.io/etcd>=3.4.0-rc.0<=3.4.9
3.4.10
etcd>=3.3.0<3.3.23
etcd>=3.4.0<3.4.10
Fedora=32

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2020-15136?

    CVE-2020-15136 is considered a moderate severity vulnerability due to its impact on cryptographic operations.

  • How do I fix CVE-2020-15136?

    To mitigate CVE-2020-15136, upgrade etcd to version 3.4.10 or later, or ensure you are using a version lower than 3.3.23.

  • What software is affected by CVE-2020-15136?

    CVE-2020-15136 affects various versions of the etcd software, specifically those above 3.3.0 and lower than or equal to 3.3.23 and 3.4.10.

  • What are the potential consequences of CVE-2020-15136?

    Exploitation of CVE-2020-15136 can lead to improper validation of endpoint security, which may compromise cryptographic operations.

  • Is there a workaround for CVE-2020-15136?

    There are no specific workarounds for CVE-2020-15136; the recommended action is to upgrade to a secure version of etcd.

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