Important: openvpn

Issue Overview:

OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service when receiving malformed IPv6 packet. (CVE-2017-7508)

OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service by authenticated remote attacker via sending a certificate with an embedded NULL character. (CVE-2017-7522)

OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service due to memory exhaustion caused by memory leaks and double-free issue in extract_x509_extension(). (CVE-2017-7521)

OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service and/or possibly sensitive memory leak triggered by man-in-the-middle attacker. (CVE-2017-7520)

Affected Packages:

openvpn

Issue Correction:
Run yum update openvpn to update your system.

New Packages:

i686:  
    openvpn-devel-2.4.3-1.19.amzn1.i686  
    openvpn-debuginfo-2.4.3-1.19.amzn1.i686  
    openvpn-2.4.3-1.19.amzn1.i686  
  
src:  
    openvpn-2.4.3-1.19.amzn1.src  
  
x86_64:  
    openvpn-2.4.3-1.19.amzn1.x86_64  
    openvpn-debuginfo-2.4.3-1.19.amzn1.x86_64  
    openvpn-devel-2.4.3-1.19.amzn1.x86_64  

Additional References

Red Hat: CVE-2017-7508, CVE-2017-7520, CVE-2017-7521, CVE-2017-7522

Mitre: CVE-2017-7508, CVE-2017-7520, CVE-2017-7521, CVE-2017-7522