Improper input validation in Linux kernel

1) Improper input validation

EUVDB-ID: #VU92861

Risk: Low

CVSSv3.1: 3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2008-0009

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a local user to gain access to sensitive information.

The vmsplice_to_user function in fs/splice.c in the Linux kernel 2.6.22 through 2.6.24 does not validate a certain userspace pointer before dereference, which might allow local users to access arbitrary kernel memory locations.

Mitigation

Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://isec.pl/vulnerabilities/isec-0026-vmsplice_to_kernel.txt
http://secunia.com/advisories/28835
http://secunia.com/advisories/28896
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.24.1
http://www.securityfocus.com/archive/1/487982/100/0/threaded
http://www.securityfocus.com/bid/27704
http://www.securityfocus.com/bid/27799
http://www.vupen.com/english/advisories/2008/0487/references
http://bugzilla.redhat.com/show_bug.cgi?id=431206
http://www.redhat.com/archives/fedora-package-announce/2008-February/msg00254.html
http://www.redhat.com/archives/fedora-package-announce/2008-February/msg00255.html

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. However, proof of concept for this vulnerability is available.