QID 239828

Date Published: 2021-11-10

QID 239828: Red Hat Update for libgcrypt (RHSA-2021:4409)

the libgcrypt library provides general-purpose implementations of various cryptographic algorithms.

Security Fix(es):
  • libgcrypt: mishandles elgamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm (cve-2021-33560)

Affected Products:

  • Red Hat enterprise linux for x86_64 8 x86_64
  • Red Hat enterprise linux for ibm z systems 8 s390x
  • Red Hat enterprise linux for power, little endian 8 ppc64le
  • Red Hat enterprise linux for arm 64 8 aarch64



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

On successful exploitation, it could allow an attacker to execute code.

  • CVSS V3 rated as High - 7.5 severity.
  • CVSS V2 rated as Medium - 5 severity.
    • Solution
    Upgrade to the latest packages which contain a patch.

    Refer to Refer to :
    Applying Package Updates to RHEL system     for details.

    Refer to Red Hat security advisory RHSA-2021:4409 Update to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239828

    CVE-2021-33560 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:4409 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:4409
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