CVE-2021-33560

CVSS V2 Medium 5 CVSS V3 High 7.5

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.

Overview

CVE ID
CVE-2021-33560

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2021-06-08T11:15:07

Last Modified Date
2022-12-07T01:20:42

Weakness Enumerations

CWE	URL
CWE-203	http://cwe.mitre.org/data/definitions/203.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:gnupg:libgcrypt::::::::	1	OR		1.8.8
cpe:2.3:a:gnupg:libgcrypt::::::::	1	OR	1.9.0	1.9.3
cpe:2.3:o:debian:debian_linux:9.0:::::::*	1	OR
cpe:2.3:o:fedoraproject:fedora:33:::::::*	1	OR
cpe:2.3:o:fedoraproject:fedora:34:::::::*	1	OR
cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:::::::*	1	OR
cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.9.0:::::::*	1	OR
cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:::::::*	1	OR
cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.14.0:::::::*	1	OR
cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.0:::::::*	1	OR
cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.1:::::::*	1	OR
cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.8.0:::::::*	1	OR
cpe:2.3:a:oracle:communications_cloud_native_core_service_communication_proxy:1.15.0:::::::*	1	OR

CVSS Version 2

Version
2.0

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

Access Vector
NETWORK

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
NONE

Availability Impact
NONE

Base Score
5

Severity
MEDIUM

Exploitability Score
10

Impact Score
2.9

CVSS Version 3

Version
3.1

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

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
NONE

Base Score
7.5

Base Severity
HIGH

Exploitability Score
3.9

Impact Score
3.6

References

Reference URL	Reference Tags
https://dev.gnupg.org/T5305	Release Notes Vendor Advisory
https://dev.gnupg.org/T5328	Vendor Advisory
https://dev.gnupg.org/T5466	Release Notes Vendor Advisory
https://dev.gnupg.org/rCe8b7f10be275bcedb5fc05ed4837a89bfd605c61	Patch Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00021.html	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BKKTOIGFW2SGN3DO2UHHVZ7MJSYN4AAB/	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R7OAPCUGPF3VLA7QAJUQSL255D4ITVTL/	Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202210-13
https://www.oracle.com/security-alerts/cpuapr2022.html	Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html	Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html
https://www.oracle.com/security-alerts/cpuoct2021.html	Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-33560
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33560

History

Created	Old Value	New Value	Data Type	Notes
2022-04-20 16:59:09				Added to TrackCVE
2022-12-05 03:42:09	2021-06-08T11:15Z	2021-06-08T11:15:07	CVE Published Date	updated
2022-12-05 03:42:09		2022-10-31T04:15:15	CVE Modified Date	updated
2022-12-05 03:42:09		Undergoing Analysis	Vulnerability Status	updated
2022-12-05 03:42:13			References	updated
2022-12-07 02:12:02		2022-12-07T01:20:42	CVE Modified Date	updated
2022-12-07 02:12:02	Undergoing Analysis	Analyzed	Vulnerability Status	updated