Use of uninitialized resource in Linux kernel fs

1) Use of uninitialized resource

EUVDB-ID: #VU92424

Risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-10732

CWE-ID: CWE-908 - Use of Uninitialized Resource

Exploit availability: No

Description

The vulnerability allows a local user to read memory contents or crash the application.

The vulnerability exists due to use of uninitialized resource error within the fill_thread_core_info() function in fs/binfmt_elf.c. A local user can read memory contents or crash the application.

Mitigation

Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10732
http://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=aca969cacf07f41070d788ce2b8ca71f09d5207d
http://github.com/google/kmsan/issues/76
http://github.com/ruscur/linux/commit/a95cdec9fa0c08e6eeb410d461c03af8fd1fef0a
http://twitter.com/grsecurity/status/1252558055629299712
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html
http://usn.ubuntu.com/4411-1/
http://usn.ubuntu.com/4427-1/
http://usn.ubuntu.com/4439-1/
http://usn.ubuntu.com/4440-1/
http://usn.ubuntu.com/4485-1/
http://security.netapp.com/advisory/ntap-20210129-0005/
http://lore.kernel.org/lkml/CAG_fn=VZZ7yUxtOGzuTLkr7wmfXWtKK9BHHYawj=rt9XWnCYvg%40mail.gmail.com/

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.