Medium: libgcrypt

Issue Overview:

A side-channel attack flaw was found in the way libgcrypt implemented Elgamal encryption. This flaw allows an attacker to decrypt parts of ciphertext encrypted using Elgamal, for example, when using OpenPGP. The highest threat from this vulnerability is to confidentiality. (CVE-2021-33560)

Affected Packages:

libgcrypt

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

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

New Packages:

aarch64:  
    libgcrypt-1.5.3-14.amzn2.0.3.aarch64  
    libgcrypt-devel-1.5.3-14.amzn2.0.3.aarch64  
    libgcrypt-debuginfo-1.5.3-14.amzn2.0.3.aarch64  
  
i686:  
    libgcrypt-1.5.3-14.amzn2.0.3.i686  
    libgcrypt-devel-1.5.3-14.amzn2.0.3.i686  
    libgcrypt-debuginfo-1.5.3-14.amzn2.0.3.i686  
  
src:  
    libgcrypt-1.5.3-14.amzn2.0.3.src  
  
x86_64:  
    libgcrypt-1.5.3-14.amzn2.0.3.x86_64  
    libgcrypt-devel-1.5.3-14.amzn2.0.3.x86_64  
    libgcrypt-debuginfo-1.5.3-14.amzn2.0.3.x86_64  

Additional References

Red Hat: CVE-2021-33560

Mitre: CVE-2021-33560