QID 354634

Date Published: 2023-01-02

QID 354634: Amazon Linux Security Advisory for libgcrypt : AL2012-2022-366

Package updates are available for Amazon Linux that fix the following vulnerabilities:
CVE-2021-33560:
1970096: CVE-2021-33560 libgcrypt: mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm 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.

Successful exploitation of this vulnerability could lead to a security breach or could affect integrity, availability, and confidentiality.

CVSS V3 rated as High - 7.5 severity.

CVSS V2 rated as Medium - 5 severity.

Solution

Administrators are advised to apply the appropriate software updates.

Vendor References

CVEs related to QID 354634

CVE-2021-33560 |

Software Advisories

Advisory ID	Software	Component	Link
AL2012-2022-366	Amazon Linux Bare Metal		docs.aws.amazon.com/AWSEC2/latest/UserGuide/install-updates.html

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