Medium: libgcrypt

Issue Overview:

Fix a side-channel attack on data-dependent timing variations in modular exponentiation, which can potentially lead to an information leak. (CVE-2015-0837)

Fix a side-channel attack which can potentially lead to an information leak. (CVE-2014-3591)

Libgcrypt before 1.5.4, as used in GnuPG and other products, does not properly perform ciphertext normalization and ciphertext randomization, which makes it easier for physically proximate attackers to conduct key-extraction attacks by leveraging the ability to collect voltage data from exposed metal, a different vector than CVE-2013-4576, which was fixed in ALAS-2014-278 (https://alas.aws.amazon.com/ALAS-2014-278.html). (CVE-2014-5270)

Affected Packages:

libgcrypt

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

New Packages:

i686:  
    libgcrypt-debuginfo-1.5.3-12.18.amzn1.i686  
    libgcrypt-devel-1.5.3-12.18.amzn1.i686  
    libgcrypt-1.5.3-12.18.amzn1.i686  
  
src:  
    libgcrypt-1.5.3-12.18.amzn1.src  
  
x86_64:  
    libgcrypt-devel-1.5.3-12.18.amzn1.x86_64  
    libgcrypt-debuginfo-1.5.3-12.18.amzn1.x86_64  
    libgcrypt-1.5.3-12.18.amzn1.x86_64  

Additional References

Red Hat: CVE-2014-3591, CVE-2014-5270, CVE-2015-0837

Mitre: CVE-2014-3591, CVE-2014-5270, CVE-2015-0837