Description
Plone CMS 3.x uses invariant data (a client username and a server secret) when calculating an HMAC-SHA1 value for an authentication cookie, which makes it easier for remote attackers to gain permanent access to an account by sniffing the network.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | plone | <= 3.1.7 | — | GHSA-hjp5-hv33-q58g |
References
- 3754 third-party-advisory
- plone-hmacsha1-mitm(41421) vdb-entry
- 20080313 PR08-02: Plone CMS Security Research - the Art of Plowning mailing-list
- http://www.procheckup.com/Hacking_Plone_CMS.pdf