Input validation error in Linux kernel sunrpc xprtrdma

1) Input validation error

EUVDB-ID: #VU94145

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-47001

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation within the rpcrdma_xprt_connect() and rpcrdma_post_sends() functions in net/sunrpc/xprtrdma/verbs.c, within the rpcrdma_reply_handler() function in net/sunrpc/xprtrdma/rpc_rdma.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://git.kernel.org/stable/c/eddae8be7944096419c2ae29477a45f767d0fcd4
http://git.kernel.org/stable/c/8834ecb5df22b7ff3c9b0deba7726579bb613f95
http://git.kernel.org/stable/c/19b5fa9489b5706bc878c3a522a7f771079e2fa0
http://git.kernel.org/stable/c/35d8b10a25884050bb3b0149b62c3818ec59f77c

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.