Input validation error in Linux kernel

1) Input validation error

EUVDB-ID: #VU41283

Risk: High

CVSSv4.0: 7.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2014-3631

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

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

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via multiple "keyctl newring" operations followed by a "keyctl timeout" operation.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Linux kernel: 3.16.0 - 3.16.1

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:3.16.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.16.1:*:*:*:*:*:*:*

External links

https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=95389b08d93d5c06ec63ab49bd732b0069b7c35e
https://osvdb.org/show/osvdb/111298
https://www.exploit-db.com/exploits/36268
https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.16.3
https://www.securityfocus.com/bid/70095
https://www.ubuntu.com/usn/USN-2378-1
https://www.ubuntu.com/usn/USN-2379-1
https://bugzilla.redhat.com/show_bug.cgi?id=1140325
https://github.com/torvalds/linux/commit/95389b08d93d5c06ec63ab49bd732b0069b7c35e

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.