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redhatRedHatRHSA-2021:4409
HistoryNov 09, 2021 - 9:18 a.m.

(RHSA-2021:4409) Moderate: libgcrypt security and bug fix update

2021-11-0909:18:49
access.redhat.com
28
libgcrypt
security fix
elgamal encryption
side-channel attack
cve-2021-33560
red hat enterprise linux 8.5

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

0.002

Percentile

61.1%

JSON

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)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.

OSVersionArchitecturePackageVersionFilename
RedHat8s390xlibgcrypt-devel-debuginfo< 1.8.5-6.el8libgcrypt-devel-debuginfo-1.8.5-6.el8.s390x.rpm
RedHat8s390xlibgcrypt< 1.8.5-6.el8libgcrypt-1.8.5-6.el8.s390x.rpm
RedHat8aarch64libgcrypt-debuginfo< 1.8.5-6.el8libgcrypt-debuginfo-1.8.5-6.el8.aarch64.rpm
RedHat8ppc64lelibgcrypt-devel< 1.8.5-6.el8libgcrypt-devel-1.8.5-6.el8.ppc64le.rpm
RedHat8ppc64lelibgcrypt-devel-debuginfo< 1.8.5-6.el8libgcrypt-devel-debuginfo-1.8.5-6.el8.ppc64le.rpm
RedHat8aarch64libgcrypt-debugsource< 1.8.5-6.el8libgcrypt-debugsource-1.8.5-6.el8.aarch64.rpm
RedHat8x86_64libgcrypt-devel< 1.8.5-6.el8libgcrypt-devel-1.8.5-6.el8.x86_64.rpm
RedHat8i686libgcrypt< 1.8.5-6.el8libgcrypt-1.8.5-6.el8.i686.rpm
RedHat8i686libgcrypt-debugsource< 1.8.5-6.el8libgcrypt-debugsource-1.8.5-6.el8.i686.rpm
RedHat8ppc64lelibgcrypt-debuginfo< 1.8.5-6.el8libgcrypt-debuginfo-1.8.5-6.el8.ppc64le.rpm
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1-10 of 251

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CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

0.002

Percentile

61.1%

JSON
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