CVE-2021-20288
High
Description
An authentication flaw was found in ceph in versions before 14.2.20. When the monitor handles CEPHX_GET_AUTH_SESSION_KEY requests, it doesn't sanitize other_keys, allowing key reuse. An attacker who can request a global_id can exploit the ability of any user to request a global_id previously associated with another user, as ceph does not force the reuse of old keys to generate new ones. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
SeverityHigh
CVSS7.2
Exploit probability—
Product
Linuxfoundation Ceph
PublishedApr 15, 2021
First seenApr 15, 2021
Weakness typeCWE-287Improper authentication
How to fix
Update
- linuxfoundation ceph14.2.21 or later
Vendor advisories
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/362CEPPYF3YMJZBEJQUT3KDE2EHYYIYQ/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5BPIAYTRCWAU4XWCDBK2THEFVXSC4XGK/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JVWUKUUS5BCIFWRV3JCUQMAPJ4HIWSED/
- security.gentoo.org/glsa/202105-39
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linuxfoundation ceph | v < 14.2.21 | 14.2.21 |
| redhat ceph_storage | 4.0 | — |
| fedoraproject fedora | 32, 33, 34 | — |
| debian debian_linux | 10.0 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.