danschultzer/pow · Security
Session fixation
- GHSA ID
- GHSA-v2wf-c3j6-wpvw
- CVE ID
- CVE-2020-5205
- Severity
- medium
- Published
- Updated
- CVSS
- 6.5 · CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N
- CVSS v3
- 6.5 · CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N
Description
Impact
The use of Plug.Session in Pow.Plug.Session is susceptible to session fixation attacks if a persistent session store is used for Plug.Session, such as Redis or a database. Cookie store, which is used in most Phoenix apps, doesn't have this vulnerability.
Workarounds
Call Plug.Conn.configure_session(conn, renew: true) periodically and after privilege change. A custom authorization plug can be written where the create/3 method should return the conn only after Plug.Conn.configure_session/2 have been called on it.
References
https://github.com/danschultzer/pow/commit/578ffd3d8bb8e8a26077b644222186b108da474f
https://www.owasp.org/index.php/Session_fixation
CWEs
- CWE-384 · Session Fixation
References
- https://github.com/danschultzer/pow/security/advisories/GHSA-v2wf-c3j6-wpvw ↗
- https://nvd.nist.gov/vuln/detail/CVE-2020-5205 ↗
- https://github.com/danschultzer/pow/commit/578ffd3d8bb8e8a26077b644222186b108da474f ↗
- https://github.com/danschultzer/pow/blob/master/CHANGELOG.md#v1016-2020-01-07 ↗
- https://github.com/advisories/GHSA-v2wf-c3j6-wpvw ↗