Amazon Linux AMI update for openvpn

1) Buffer overflow

EUVDB-ID: #VU8637

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-12166

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to boundary error in the read_key() function when "Key Method 1" is used. A remote unauthenticated attacker can send a specially crafted key, trigger buffer overflow and cause denial of service or execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages.

i686:
    openvpn-debuginfo-2.4.4-1.21.amzn1.i686
    openvpn-2.4.4-1.21.amzn1.i686
    openvpn-devel-2.4.4-1.21.amzn1.i686

src:
    openvpn-2.4.4-1.21.amzn1.src

x86_64:
    openvpn-debuginfo-2.4.4-1.21.amzn1.x86_64
    openvpn-devel-2.4.4-1.21.amzn1.x86_64
    openvpn-2.4.4-1.21.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*

External links

https://alas.aws.amazon.com/ALAS-2017-920.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.