NULL pointer dereference in Linux kernel

1) NULL pointer dereference

EUVDB-ID: #VU20490

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-2019-12614

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dreference error in dlpar_parse_cc_property in arch/powerpc/platforms/pseries/dlpar.c due to  kstrdup of prop->name. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.1.1 - 5.1.6

External links

http://www.securityfocus.com/bid/108550
http://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id=efa9ace68e487ddd29c2b4d6dd23242158f1f607
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MDURACJVGIBIYBSGDZJTRDPX46H5WPZW/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OBJHGQXA4PQ5EOGCOXEH3KFDNVZ2I4X7/
http://lkml.org/lkml/2019/6/3/526

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.