Medium: openssl

Issue Overview:

Libgcrypt allows a memory-cache side-channel attack on ECDSA signatures that can be mitigated through the use of blinding during the signing process in the _gcry_ecc_ecdsa_sign function in cipher/ecc-ecdsa.c, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.(CVE-2018-0495)

While parsing an IPAddressFamily extension in an X.509 certificate, it is possible to do a one-byte overread. This would result in an incorrect text display of the certificate. This bug has been present since 2006.(CVE-2017-3735)

Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe.(CVE-2018-0739)

Affected Packages:

openssl

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

New Packages:

i686:  
    openssl-static-1.0.2k-16.146.amzn1.i686  
    openssl-1.0.2k-16.146.amzn1.i686  
    openssl-devel-1.0.2k-16.146.amzn1.i686  
    openssl-perl-1.0.2k-16.146.amzn1.i686  
    openssl-debuginfo-1.0.2k-16.146.amzn1.i686  
  
src:  
    openssl-1.0.2k-16.146.amzn1.src  
  
x86_64:  
    openssl-perl-1.0.2k-16.146.amzn1.x86_64  
    openssl-devel-1.0.2k-16.146.amzn1.x86_64  
    openssl-1.0.2k-16.146.amzn1.x86_64  
    openssl-static-1.0.2k-16.146.amzn1.x86_64  
    openssl-debuginfo-1.0.2k-16.146.amzn1.x86_64  

Additional References

Red Hat: CVE-2017-3735, CVE-2018-0495, CVE-2018-0739

Mitre: CVE-2017-3735, CVE-2018-0495, CVE-2018-0739