CVE-2020-15113

Description

In etcd before versions 3.3.23 and 3.4.10, certain directory paths are created (etcd data directory and the directory path when provided to automatically generate self-signed certificates for TLS connections with clients) with restricted access permissions (700) by using the os.MkdirAll. This function does not perform any permission checks when a given directory path exists already. A possible workaround is to ensure the directories have the desired permission (700).

CVSS Metrics

• v3.1•MEDIUM•Score: 5.7CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
• v3.1•HIGH•Score: 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
• v2.0•LOW•Score: 3.6AV:L/AC:L/Au:N/C:P/I:P/A:N

EPSS Trends

Current EPSS score: 0.02%• Percentile: 7%

Techniques & Countermeasures

• CWE-281•Improper Preservation of Permissions

  The product does not preserve permissions or incorrectly preserves permissions when copying, restoring, or sharing objects, which can cause them to have less restrictive permissions than intended.

Affected Systems

• etcd-io•etcd

  < 3.3.23 | < 3.4.10

• etcd•etcd

  < 3.3.23 | ≥ 3.4.0, < 3.4.10

• fedoraproject•fedora

  32

• github.com/etcd-io•etcd

  ≥ 3.4.0-rc.0, < 3.4.10 | < 3.3.23

References (6)

• https://github.com/etcd-io/etcd/security/advisories/GHSA-chh6-ppwq-jh92
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6B6R43Y7M3DCHWK3L3UVGE2K6WWECMP/
• https://nvd.nist.gov/vuln/detail/CVE-2020-15113
• https://github.com/etcd-io/etcd/commit/6be5c54c94298ae6746a574d2af8227d0c9a998b
• https://github.com/etcd-io/etcd/commit/e5424fc474b274c9e6b5205165015bc2035745f2
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L6B6R43Y7M3DCHWK3L3UVGE2K6WWECMP