#VU72630 Incorrect default permissions in Ceph - CVE-2022-3650

Vulnerability identifier: #VU72630

Vulnerability risk: Low

CVSSv4.0: 7.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear]

CVE-ID: CVE-2022-3650

CWE-ID: CWE-276

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Ceph
Server applications / Other server solutions

Vendor: Red Hat Inc.

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to ceph-crash.service runs the ceph-crash Python script with root privileges. The script is operating in the directory /var/lib/ceph/crash which is controlled by the unprivileged ceph user. A local user can inject arbitrary data into the crash dump and force the privileged script to write that file into an arbitrary location on the system, resulting in privilege escalation.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Ceph: 16.2.0 - 16.2.10

---

External links
https://bugzilla.redhat.com/show_bug.cgi?id=2136909

---

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.