ALAS2-2022-1769

Related Vulnerabilities: CVE-2021-33560  

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)

ALAS2-2022-1769


Amazon Linux 2 Security Advisory: ALAS-2022-1769
Advisory Release Date: 2022-04-04 23:22 Pacific
Advisory Updated Date: 2022-04-06 23:12 Pacific
Severity: Medium
References: CVE-2021-33560 

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


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