CVE-2021-33560
Libgcrypt ElGamal Side-channel Attack
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.
INFO
Published Date :
June 8, 2021, 11:15 a.m.
Last Modified :
Nov. 21, 2024, 6:09 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2021-33560 has a 13 public PoC/Exploit
available at Github.
Go to the Public Exploits
tab to see the list.
Affected Products
The following products are affected by CVE-2021-33560
vulnerability.
Even if cvefeed.io
is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-33560
.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Dockerfile Roff Java
None
Dockerfile Python
None
asp-net-core csharp docker dockerfile javascript react webapi docker-compose
C# Dockerfile HTML JavaScript CSS
None
HTML
None
HTML
None
TypeScript
None
a test code repository
Dockerfile HCL
Helm chart for MarkLogic Server
Smarty Makefile Go Mustache Shell
Scan a list of container images using Aqua Security's trivy CLI tool
Shell
demo stuff
Dockerfile Rust Shell HCL
Tool to check whether a PGP client is affected by CVE-2021-33560
Python
Automatic monitor github cve using Github Actions
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-33560
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-33560
vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://dev.gnupg.org/rCe8b7f10be275bcedb5fc05ed4837a89bfd605c61 Added Reference https://dev.gnupg.org/T5305 Added Reference https://dev.gnupg.org/T5328 Added Reference https://dev.gnupg.org/T5466 Added Reference https://lists.debian.org/debian-lts-announce/2021/06/msg00021.html Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BKKTOIGFW2SGN3DO2UHHVZ7MJSYN4AAB/ Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R7OAPCUGPF3VLA7QAJUQSL255D4ITVTL/ Added Reference https://security.gentoo.org/glsa/202210-13 Added Reference https://www.oracle.com/security-alerts/cpuapr2022.html Added Reference https://www.oracle.com/security-alerts/cpujan2022.html Added Reference https://www.oracle.com/security-alerts/cpujul2022.html Added Reference https://www.oracle.com/security-alerts/cpuoct2021.html -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R7OAPCUGPF3VLA7QAJUQSL255D4ITVTL/ [No types assigned] Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BKKTOIGFW2SGN3DO2UHHVZ7MJSYN4AAB/ [No types assigned] Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/R7OAPCUGPF3VLA7QAJUQSL255D4ITVTL/ Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/BKKTOIGFW2SGN3DO2UHHVZ7MJSYN4AAB/ -
Modified Analysis by [email protected]
Dec. 07, 2022
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202210-13 No Types Assigned https://security.gentoo.org/glsa/202210-13 Third Party Advisory Changed Reference Type https://www.oracle.com/security-alerts/cpujul2022.html No Types Assigned https://www.oracle.com/security-alerts/cpujul2022.html Patch, Third Party Advisory -
CVE Modified by [email protected]
Oct. 31, 2022
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202210-13 [No Types Assigned] -
CVE Modified by [email protected]
Jul. 25, 2022
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpujul2022.html [No Types Assigned] -
Modified Analysis by [email protected]
May. 13, 2022
Action Type Old Value New Value Changed Reference Type https://www.oracle.com/security-alerts/cpuapr2022.html No Types Assigned https://www.oracle.com/security-alerts/cpuapr2022.html Patch, Third Party Advisory Changed CPE Configuration OR *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_repository_function:1.14.0:*:*:*:*:*:*:* OR *cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:*:*:*:*:*:*:* *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:*:*:*:*:*:*:* *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:*:*:*:*:*:*:* *cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.8.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:communications_cloud_native_core_service_communication_proxy:1.15.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Apr. 20, 2022
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpuapr2022.html [No Types Assigned] -
Modified Analysis by [email protected]
Mar. 01, 2022
Action Type Old Value New Value Changed Reference Type https://www.oracle.com/security-alerts/cpujan2022.html No Types Assigned https://www.oracle.com/security-alerts/cpujan2022.html Patch, Third Party Advisory Changed CPE Configuration OR *cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.14.0:*:*:*:*:*:*:* OR *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_repository_function:1.14.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Feb. 07, 2022
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpujan2022.html [No Types Assigned] -
Modified Analysis by [email protected]
Dec. 01, 2021
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/BKKTOIGFW2SGN3DO2UHHVZ7MJSYN4AAB/ Third Party Advisory https://lists.fedoraproject.org/archives/list/[email protected]/message/BKKTOIGFW2SGN3DO2UHHVZ7MJSYN4AAB/ Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/R7OAPCUGPF3VLA7QAJUQSL255D4ITVTL/ Third Party Advisory https://lists.fedoraproject.org/archives/list/[email protected]/message/R7OAPCUGPF3VLA7QAJUQSL255D4ITVTL/ Mailing List, Third Party Advisory Changed Reference Type https://www.oracle.com/security-alerts/cpuoct2021.html No Types Assigned https://www.oracle.com/security-alerts/cpuoct2021.html Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.14.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 20, 2021
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpuoct2021.html [No Types Assigned] -
Modified Analysis by [email protected]
Sep. 13, 2021
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/06/msg00021.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/06/msg00021.html Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/BKKTOIGFW2SGN3DO2UHHVZ7MJSYN4AAB/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/BKKTOIGFW2SGN3DO2UHHVZ7MJSYN4AAB/ Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/R7OAPCUGPF3VLA7QAJUQSL255D4ITVTL/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/R7OAPCUGPF3VLA7QAJUQSL255D4ITVTL/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Sep. 06, 2021
Action Type Old Value New Value Changed 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. (There is also an interoperability problem because the selection of the k integer value does not properly consider the differences between basic ElGamal encryption and generalized ElGamal encryption.) This, for example, affects use of ElGamal in OpenPGP. 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. -
CVE Modified by [email protected]
Jul. 01, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/BKKTOIGFW2SGN3DO2UHHVZ7MJSYN4AAB/ [No Types Assigned] -
CVE Modified by [email protected]
Jun. 30, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/R7OAPCUGPF3VLA7QAJUQSL255D4ITVTL/ [No Types Assigned] -
CVE Modified by [email protected]
Jun. 25, 2021
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2021/06/msg00021.html [No Types Assigned] -
Initial Analysis by [email protected]
Jun. 15, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://dev.gnupg.org/rCe8b7f10be275bcedb5fc05ed4837a89bfd605c61 No Types Assigned https://dev.gnupg.org/rCe8b7f10be275bcedb5fc05ed4837a89bfd605c61 Patch, Vendor Advisory Changed Reference Type https://dev.gnupg.org/T5305 No Types Assigned https://dev.gnupg.org/T5305 Release Notes, Vendor Advisory Changed Reference Type https://dev.gnupg.org/T5328 No Types Assigned https://dev.gnupg.org/T5328 Vendor Advisory Changed Reference Type https://dev.gnupg.org/T5466 No Types Assigned https://dev.gnupg.org/T5466 Release Notes, Vendor Advisory Added CWE NIST CWE-203 Added CPE Configuration OR *cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:* versions up to (excluding) 1.8.8 *cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:* versions from (including) 1.9.0 up to (excluding) 1.9.3
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-33560
is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-33560
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.19 }} -0.04%
score
0.56455
percentile