CVE-2021-33560

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Summary

CVECVE-2021-33560
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-06-08 11:15:07 UTC
Updated2026-10-14 12:17:12 UTC
DescriptionLibgcrypt 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

Problem Types: CWE-203 | CWE-325 | n/a | CWE-325 CWE-325 Missing Cryptographic Step

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1ADPDECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
2.0[email protected]Primary5AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Gnupg Libgcrypt All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
Oracle Critical Patch Update Advisory - April 2022 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
Oracle Critical Patch Update Advisory - October 2021 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Third Party Advisory
[SECURITY] Fedora 33 Update: libgcrypt-1.8.8-1.fc33 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
Oracle Critical Patch Update Advisory - January 2022 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
Oracle Critical Patch Update Advisory - July 2022 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
⚓ T5328 On the (in)security of Elgamal in OpenPGP af854a3a-2127-422b-91ae-364da2661108 dev.gnupg.org Vendor Advisory
⚓ T5305 Release Libgcrypt 1.9.3 af854a3a-2127-422b-91ae-364da2661108 dev.gnupg.org Release Notes, Vendor Advisory
[SECURITY] Fedora 34 Update: libgcrypt-1.9.3-3.fc34 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
libgcrypt: Multiple Vulnerabilities (GLSA 202210-13) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
[SECURITY] [DLA 2691-1] libgcrypt20 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
⚓ T5466 Release Libgcrypt 1.8.8 af854a3a-2127-422b-91ae-364da2661108 dev.gnupg.org Release Notes, Vendor Advisory
rCe8b7f10be275 af854a3a-2127-422b-91ae-364da2661108 dev.gnupg.org Patch, Vendor Advisory
[SECURITY] Fedora 33 Update: libgcrypt-1.8.8-1.fc33 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 34 Update: libgcrypt-1.9.3-3.fc34 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159510 Oracle Enterprise Linux Security Update for libgcrypt (ELSA-2021-4409)
  • 159742 Oracle Enterprise Linux Security Update for libgcrypt (ELSA-2022-9263)
  • 178682 Debian Security Update for libgcrypt20 (DLA 2691-1)
  • 183602 Debian Security Update for libgcrypt20 (CVE-2021-33560)
  • 198503 Ubuntu Security Notification for Libgcrypt Vulnerabilities (USN-5080-1)
  • 239828 Red Hat Update for libgcrypt (RHSA-2021:4409)
  • 281670 Fedora Security Update for libgcrypt (FEDORA-2021-24d4e06195)
  • 281672 Fedora Security Update for libgcrypt (FEDORA-2021-31fdc84207)
  • 296059 Oracle Solaris 11.4 Support Repository Update (SRU) 36.0.1.101.2 Missing (CPUJUL2021)
  • 296060 Oracle Solaris 11.4 Support Repository Update (SRU) 37.0.1.101.1 Missing (CPUJUL2021)
  • 353205 Amazon Linux Security Advisory for libgcrypt : ALAS-2022-1578
  • 353209 Amazon Linux Security Advisory for libgcrypt : ALAS2-2022-1769
  • 354634 Amazon Linux Security Advisory for libgcrypt : AL2012-2022-366
  • 500295 Alpine Linux Security Update for libgcrypt
  • 501746 Alpine Linux Security Update for libgcrypt
  • 504061 Alpine Linux Security Update for libgcrypt
  • 591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)
  • 670637 EulerOS Security Update for libgcrypt (EulerOS-SA-2021-2395)
  • 670711 EulerOS Security Update for libgcrypt (EulerOS-SA-2021-2469)
  • 670745 EulerOS Security Update for libgcrypt (EulerOS-SA-2021-2503)
  • 670774 EulerOS Security Update for libgcrypt (EulerOS-SA-2021-2532)
  • 670798 EulerOS Security Update for libgcrypt (EulerOS-SA-2021-2556)
  • 670963 EulerOS Security Update for libgcrypt (EulerOS-SA-2021-2590)
  • 671182 EulerOS Security Update for libgcrypt (EulerOS-SA-2021-2935)
  • 671236 EulerOS Security Update for libgcrypt (EulerOS-SA-2022-1173)
  • 710653 Gentoo Linux libgcrypt Multiple Vulnerabilities (GLSA 202210-13)
  • 750708 SUSE Enterprise Linux Security Update for libgcrypt (SUSE-SU-2021:2155-1)
  • 750709 SUSE Enterprise Linux Security Update for libgcrypt (SUSE-SU-2021:2157-1)
  • 750711 SUSE Enterprise Linux Security Update for libgcrypt (SUSE-SU-2021:2156-1)
  • 750728 OpenSUSE Security Update for libgcrypt (openSUSE-SU-2021:0919-1)
  • 750778 OpenSUSE Security Update for libgcrypt (openSUSE-SU-2021:2157-1)
  • 900144 CBL-Mariner Linux Security Update for libgcrypt 1.8.7
  • 903176 Common Base Linux Mariner (CBL-Mariner) Security Update for libgcrypt (4347)
  • 940222 AlmaLinux Security Update for libgcrypt (ALSA-2021:4409)
  • 960079 Rocky Linux Security Update for libgcrypt (RLSA-2021:4409)

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