Vulnerability identifier: #VU63840

Vulnerability risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-38300

CWE-ID: CWE-94

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation in the arch/mips/net/bpf_jit.c in the Linux kernel. A local user can send a specially crafted request and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel:

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External links
http://www.openwall.com/lists/oss-security/2021/09/15/5
http://security.netapp.com/advisory/ntap-20211008-0003/
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=37cb28ec7d3a36a5bace7063a3dba633ab110f8b
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10
http://bugzilla.redhat.com/show_bug.cgi?id=2002750

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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.