High severity7.5NVD Advisory· Published Jun 8, 2021· Updated Jun 17, 2026

CVE-2021-33560

Description

Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for example, affects use of ElGamal in OpenPGP.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

osv-coords37 versions
pkg:rpm/almalinux/libgcrypt-devel pkg:rpm/opensuse/libgcrypt&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/libgcrypt&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/libgcrypt&distro=openSUSE%20Tumbleweed pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3 pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/libgcrypt&distro=SUSE%20OpenStack%20Cloud%209 pkg:rpm/suse/libgcrypt&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/libgcrypt&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209 pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5 pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSS pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCL pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSS pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2 pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3 pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/libgcrypt&distro=SUSE%20Manager%20Proxy%204.0 pkg:rpm/suse/libgcrypt&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0 pkg:rpm/suse/libgcrypt&distro=SUSE%20Manager%20Server%204.0 pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Micro%205.0 pkg:rpm/almalinux/libgcrypt pkg:rpm/suse/libgcrypt&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/libgcrypt&distro=SUSE%20Enterprise%20Storage%206 pkg:rpm/suse/libgcrypt&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/libgcrypt&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL
< 1.8.5-6.el8+ 36 more
- (no CPE)range: < 1.8.5-6.el8
- (no CPE)range: < 1.8.2-8.39.1
- (no CPE)range: < 1.8.2-lp152.17.3.1
- (no CPE)range: < 1.9.4-1.2
- (no CPE)range: < 1.5.0-0.26.6.1
- (no CPE)range: < 1.5.0-0.26.6.1
- (no CPE)range: < 1.8.2-6.52.1
- (no CPE)range: < 1.8.2-6.52.1
- (no CPE)range: < 1.8.2-6.52.1
- (no CPE)range: < 1.6.1-16.77.1
- (no CPE)range: < 1.6.1-16.77.1
- (no CPE)range: < 1.6.1-16.77.1
- (no CPE)range: < 1.6.1-16.77.1
- (no CPE)range: < 1.6.1-16.77.1
- (no CPE)range: < 1.6.1-16.77.1
- (no CPE)range: < 1.6.1-16.77.1
- (no CPE)range: < 1.6.1-16.77.1
- (no CPE)range: < 1.6.1-16.77.1
- (no CPE)range: < 1.6.1-16.77.1
- (no CPE)range: < 1.6.1-16.77.1
- (no CPE)range: < 1.8.2-8.39.1
- (no CPE)range: < 1.8.2-8.39.1
- (no CPE)range: < 1.8.2-8.39.1
- (no CPE)range: < 1.8.2-8.39.1
- (no CPE)range: < 1.8.2-8.39.1
- (no CPE)range: < 1.8.2-8.39.1
- (no CPE)range: < 1.8.2-8.39.1
- (no CPE)range: < 1.8.2-8.39.1
- (no CPE)range: < 1.8.2-8.39.1
- (no CPE)range: < 1.8.2-8.39.1
- (no CPE)range: < 1.8.5-6.el8
- (no CPE)range: < 1.6.1-16.77.1
- (no CPE)range: < 1.8.2-8.39.1
- (no CPE)range: < 1.6.1-16.77.1
- (no CPE)range: < 1.8.2-6.52.1
- (no CPE)range: < 1.6.1-16.77.1
- (no CPE)range: < 1.8.2-8.39.1
Libgcrypt/Libgcryptdescription
Gnupg/Libgcryptllm-fuzzy2 versions
<1.8.8 and >=1.9.0 <1.9.3+ 1 more
- (no CPE)range: <1.8.8 and >=1.9.0 <1.9.3
- cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:*range: <1.8.8
Debian/linux
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Fedoraproject/Fedora2 versions
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Oracle Corporation/Communications Cloud Native Core Binding Support Function
cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:*:*:*:*:*:*:*
Oracle Corporation/Communications Cloud Native Core Network Function Cloud Native Environment2 versions
cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.9.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.9.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*
Oracle Corporation/Communications Cloud Native Core Network Repository Function3 versions
cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.14.0:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.14.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.1:*:*:*:*:*:*:*
Oracle Corporation/Communications Cloud Native Core Network Slice Selection Function
cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.8.0:*:*:*:*:*:*:*
Oracle Corporation/Communications Cloud Native Core Service Communication Proxy
cpe:2.3:a:oracle:communications_cloud_native_core_service_communication_proxy:1.15.0:*:*:*:*:*:*:*

Patches

Vulnerability mechanics

References

dev.gnupg.org/rCe8b7f10be275bcedb5fc05ed4837a89bfd605c61nvdPatchVendor Advisory
www.oracle.com/security-alerts/cpuapr2022.htmlnvdPatchThird Party Advisory
www.oracle.com/security-alerts/cpujan2022.htmlnvdPatchThird Party Advisory
www.oracle.com/security-alerts/cpujul2022.htmlnvdPatchThird Party Advisory
dev.gnupg.org/T5305nvdRelease NotesVendor Advisory
dev.gnupg.org/T5328nvdVendor Advisory
dev.gnupg.org/T5466nvdRelease NotesVendor Advisory
lists.debian.org/debian-lts-announce/2021/06/msg00021.htmlnvdMailing ListThird Party Advisory
security.gentoo.org/glsa/202210-13nvdThird Party Advisory
www.oracle.com/security-alerts/cpuoct2021.htmlnvdThird Party Advisory
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BKKTOIGFW2SGN3DO2UHHVZ7MJSYN4AAB/nvd
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R7OAPCUGPF3VLA7QAJUQSL255D4ITVTL/nvd

News mentions

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