Denial of service in Ceph

1) Input validation error

EUVDB-ID: #VU53311

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-3531

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when processing HTTP GET requests. A remote attacker can send a request to the swift URL that ends with two slashes it can cause the rgw to crash.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Ceph: 14.0.0 - 17.0.0

CPE2.3

• cpe:2.3:a:red_hat:ceph:14.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:ceph:14.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:ceph:14.1.0:*:*:*:*:*:*:*

External links

https://seclists.org/oss-sec/2021/q2/141
https://github.com/ceph/ceph/commit/f44a8ae8aa27ecef69528db9aec220f12492810e

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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